HT 134 - Uncategorized STIHL - Free user manual and instructions

Product Type	Pole Pruner
Brand	STIHL
Model	HT 134
Weight (without cutting attachment)	6.0 kg (13.2 lbs)
Engine Displacement	36.3 cm³ (2.22 cu. in.)
Power Output	1.4 kW (1.90 bhp) at 8500 rpm
Fuel Type	Unleaded gasoline + 2-stroke oil (50:1 mix)
Fuel Tank Capacity	0.53 L (17.9 oz.)
Chain Oil Tank Capacity	0.22 L (7.4 oz.)
Chain Pitch	3/8" P (9.32 mm)
Drive Link Gauge	1.1 mm (0.043 in.)
Guide Bar Lengths	25, 30, 35 cm (10, 12, 14 in.)
Cutting Attachment Type	Rollomatic E Mini / Rollo Light 01 (low kickback)
Saw Chain	Picco Micro Mini 3 (61 PMM3), low kickback
Chain Sprocket	7-tooth for 3/8" P
Idle Speed	2800 ± 50 rpm
Cut-off Speed	9500 rpm
Ignition	Electronic magneto
Spark Plug	NGK CMR 6H or Bosch USR 4AC (gap 0.5 mm)
Chain Lubrication	Automatic, speed-controlled oil pump
Shaft Type	Fixed drive tube (non-telescoping)
Handle	Handle hose on shaft
Carrying System	Shoulder strap
Safety Features	Stop switch, throttle trigger lockout, chain scabbard, anti-vibration system

Frequently Asked Questions - HT 134 STIHL

What type of fuel should I use for the STIHL HT 134?

Use unleaded gasoline with a minimum octane rating of 89 (R+M)/2 and no more than 10% ethanol. Mix with STIHL two-stroke engine oil at a ratio of 50:1.

How do I adjust the chain tension on the HT 134?

Shut off the engine. Loosen the nut on the chain sprocket cover. Hold the bar nose up and turn the tensioning screw clockwise until the chain fits snugly against the underside of the bar. Tighten the nut firmly. Check that the chain can still be pulled along the bar by hand.

What should I do if the saw chain becomes dull?

Sharpen the chain using a proper file and file holder. Maintain a filing angle of 30° and a side plate angle of 75° for standard chains. Check depth gauge setting and file if necessary. Alternatively, have the chain sharpened by a STIHL servicing dealer.

How do I start the engine on the HT 134?

Press the manual fuel pump bulb at least five times. Set the choke knob to the appropriate position (cold or warm start). Place the unit on firm ground, hold it securely, and pull the starter grip briskly. Once the engine runs, press the throttle trigger to release the starting throttle.

What safety precautions should I take when using the pole pruner?

Always read the instruction manual. Wear protective gear including goggles, gloves, sturdy boots, and hearing protection. Keep bystanders at least 50 feet away. Never operate above shoulder height or from a ladder. Ensure the chain stops moving when idling.

How often should I check the chain lubrication?

Check chain lubrication before each use. The saw chain should throw off a small amount of oil. Never operate without chain lubrication as it can damage the cutting attachment. Refill the chain oil tank with environmentally compatible oil like STIHL BioPlus.

Can I use the HT 134 for cutting other materials besides wood?

No. The pole pruner is designed for limbing and cutting wood only. Using it on other materials can cause personal injury or damage to the machine.

How do I store the HT 134 for a long period?

Empty the fuel tank and run the engine until it stops. Clean the machine, especially the chain and bar. Store in a dry, locked place out of reach of children. Slacken the chain tension to prevent damage.

What is the correct mix ratio for fuel?

Use a 50:1 mix ratio: 50 parts unleaded gasoline to 1 part STIHL two-stroke engine oil. For example, 20 ml of oil per 1 liter of gasoline (or 2.6 fl. oz. per 1 US gallon). Use only high-quality oils recommended for air-cooled engines.

Why does the saw chain move when the engine is idling?

If the chain moves at idle, the idle speed is too high. Turn the idle speed screw counterclockwise until the chain stops. If the problem persists, have the carburetor adjusted by a STIHL servicing dealer.

USER MANUAL HT 134 STIHL

STIHL HT 105, 134, 135 Owners Instruction Manual

Instruction Manual Manual de instrucciones

Three identical mechanical linkages with black and silver components, shown against a white background (no text or symbols visible)

WARNING

Read Instruction Manual thoroughly before use and follow all safety precautions – improper use can cause serious or fatal injury.

ADVERTENCIA

Two black-and-white icons: a triangular warning triangle with an exclamation mark and a person reading a book (no text or symbols present)

Instruction Manual

1 - 48

Guide to Using this Manual 2
Safety Precautions and Working Techniques 3
Using the Unit 14
Assembling the Unit 16
Cutting Attachment 17
Mounting the Bar and Chain 18
Tensioning the Chain 19
Checking Chain Tension 19
Adjusting the Throttle Cable 19
Fitting the Clip 20
Fuel 20
Fueling 21
Chain Lubricant 23
Filling Chain Oil Tank 23
Checking Chain Lubrication 25
Adjusting the Telescoping Shaft 25
Fitting the Harness 26
Backpack Carrying System 26
Starting / Stopping the Engine 28
Maintaining and Sharpening the Saw Chain 30
Operating Instructions 33
Taking Care of the Guide Bar 33
Replacing the Air Filter 34
Engine Management 34
Adjusting the Carburetor 35
Spark Arresting Screen in Muffler 35
Spark Plug 36
Storing the Machine 37
Checking and Replacing the Chain Sprocket 37

HT 105, HT 134, HT 135

Maintenance and Care 39
Main Parts 41
Specifications 43
Maintenance and Repairs 44
Disposal 44
Limited Warranty 45
STIHL Incorporated Federal
Emission Control Warranty
Statement 45
Trademarks 47

Allow only persons who fully understand this manual to operate your pole pruner.
To receive maximum performance and satisfaction from your STIHL pole pruner, it is important that you read, understand and follow the safety precautions and the operating and maintenance instructions in chapter "Safety Precautions and Working Techniques" before using your pole pruner. For further information you can go to www.stihlusa.com.

Contact your STIHL dealer or the STIHL distributor for your area if you do not understand any of the instructions in this manual.

WARNING

Because a pole pruner is a high-speed, fast-cutting power tool with an extended reach, special safety precautions must be observed to reduce the risk of personal injury. Careless or improper use may cause serious or even fatal injury.

This instruction manual is protected by copyright. All rights reserved, especially the rights to reproduce, translate and process with electronic systems.

English

Guide to Using this Manual

Pictograms

The meanings of the pictograms attached to or embossed on the machine are explained in this manual.

Depending on the model concerned, the following pictograms may be on your machine.

Fuel tank for gasoline and engine oil mixture

Tank for bar and chain oil

Direction of chain rotation

Press to operate manual fuel pump

Manual fuel pump

Symbols in Text

Many operating and safety instructions are supported by illustrations.

The individual steps or procedures described in the manual may be shown in different ways:

●A bullet indicates a step or procedure.
A description of a step or procedure that refers directly to an illustration may contain item numbers that appear in the illustration. For example:
- Remove the screw (1)
●Pull the spark arresting screen (2) upwards out of the muffler

In addition to the operating instructions, this manual may contain paragraphs that require your special attention. Such paragraphs are indicated with the symbols and signal words described below:

DANGER

Indicates a hazardous situation that, if not avoided, will result in death or serious injury.

WARNING

Indicates a hazardous situation that, if not avoided, could result in death or serious injury.

NOTICE

Indicates a risk of property damage, including damage to the machine or its individual components.

Engineering Improvements

STIHL's philosophy is to continually improve all of its products. As a result, engineering changes and improvements are made from time to time. Therefore, some changes, modifications and improvements may not be covered in

this manual. If the operating characteristics or the appearance of your machine differs from those described in this manual, please contact your STIHL dealer or the STIHL distributor for your area for assistance.

Safety Precautions and Working Techniques

Because a pole pruner is a high-speed, fast-cutting power tool with an extended reach, special safety precautions must be observed to reduce the risk of personal injury.

It is important that you read, fully understand and observe the following safety precautions and warnings. Read the instruction manual and the safety precautions periodically. Careless or improper use may cause serious or fatal injury.

Have your STIHL dealer show you how to operate your power tool. Observe all applicable national, state and local laws, safety regulations, standards and ordinances.

WARNING

Do not lend or rent your power tool without the instruction manual. Be sure that anyone using it understands the information contained in this manual.

WARNING

The use of this machine may be hazardous. The pole pruner chain has many sharp cutters. If the cutters contact your flesh, they will cut you, even if the chain is not moving.

WARNING

Do not cut any material other than wood or wooden objects. Use your pole pruner for limbing only.

Do not use it for other purposes, since misuse may result in personal injury or property damage, including damage to the machine.

WARNING

Minors should never be allowed to use this power tool. Bystanders, especially children, and animals should not be allowed in the area where it is in use.

WARNING

To reduce the risk of injury to bystanders and damage to property, never let your power tool run unattended. When it is not in use (e.g. during a work break), shut it off and make sure that unauthorized persons do not use it.

Most of these safety precautions and warnings apply to the use of all STIHL pole pruners. Different models may have different parts and controls. See the appropriate section of your instruction manual for a description of the controls and the function of the parts of your model.

Safe use of a pole pruner involves

1. the operator
2. the power tool
3. the use of the power tool.

THE OPERATOR

Physical Condition

You must be in good physical condition and mental health and not under the influence of any substance (drugs, alcohol, etc.) which might impair vision, dexterity or judgment. Do not operate this machine when you are fatigued.

WARNING

Be alert – if you get tired, take a break. Tiredness may result in loss of control. Working with any power tool can be strenuous. If you have any condition that might be aggravated by strenuous work, check with your doctor before operating this machine.

WARNING

Prolonged use of a power tool (or other machines) exposing the operator to vibrations may produce whitefinger disease (Raynaud's phenomenon) or carpal tunnel syndrome.

These conditions reduce the hand's ability to feel and regulate temperature, produce numbness and burning sensations and may cause nerve and circulation damage and tissue necrosis.

All factors which contribute to whitefinger disease are not known, but cold weather, smoking and diseases or physical conditions that affect blood vessels and blood transport, as well as high vibration levels and long periods of

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exposure to vibration are mentioned as factors in the development of whitefinger disease. In order to reduce the risk of whitefinger disease and carpal tunnel syndrome, please note the following:

• Most STIHL power tools are available with an anti-vibration ("AV") system designed to reduce the transmission of vibrations created by the machine to the operator's hands. An AV system is recommended for those persons using power tools on a regular or sustained basis.
• Wear gloves and keep your hands warm.
• Keep the AV system well maintained. A power tool with loose components or with damaged or worn AV elements will tend to have higher vibration levels.
• Maintain a firm grip at all times, but do not squeeze the handles with constant, excessive pressure. Take frequent breaks.

All the above-mentioned precautions do not guarantee that you will not sustain whitefinger disease or carpal tunnel syndrome. Therefore, continual and regular users should closely monitor the condition of their hands and fingers. If any of the above symptoms appear, seek medical advice immediately.

WARNING

The ignition system of the STIHL unit produces an electromagnetic field of a very low intensity. This field may interfere with some pacemakers. To reduce the risk of serious or fatal injury, persons with a pacemaker should

consult their physician and the pacemaker manufacturer before operating this tool.

Proper Clothing

WARNING

To reduce the risk of injury, the operator should wear proper protective apparel.

WARNING

To reduce the risk of injury to your eyes never operate your power tool unless wearing goggles or properly fitted protective glasses with adequate top and side protection complying with ANSI Z 87.1 "+" (or your applicable national standard). To reduce the risk of injury to your face STIHL recommends that you also wear a face shield or face screen over your goggles or protective glasses.

Wear an approved safety hard hat to reduce the risk of injury to your head.

Power tool noise may damage your hearing. Wear sound barriers (ear plugs or ear mufflers) to protect your hearing. Continual and regular users should have their hearing checked regularly.

Be particularly alert and cautious when wearing hearing protection because your ability to hear warnings (shouts, alarms, etc.) is restricted.

Always wear heavy-duty work gloves (e.g. made of leather or other wear resistant material) when handling the machine and the cutting tool. Heavy-duty, nonslip gloves improve your grip and help to protect your hands.

Clothing must be sturdy and snug-fitting, but allow complete freedom of movement. Wear long pants made of heavy material to help protect your legs. Do not wear shorts, sandals or go barefoot.

Avoid loose-fitting jackets, scarfs, neckties, jewelry, flared or cuffed pants, unconfined long hair or anything that could become caught on branches, brush or the moving parts of the unit. Secure hair so it is above shoulder level.

Good footing is very important. Wear sturdy boots with nonslip soles. Steel-toed safety boots with cut retardant inserts are recommended.

THE POWER TOOL

For illustrations and definitions of the power tool parts see the chapter on "Main Parts."

WARNING

Never modify this power tool in any way. Only attachments supplied by STIHL or expressly approved by STIHL for use with the specific STIHL model are authorized. Although certain unauthorized attachments are useable with STIHL power tools, their use may, in fact, be extremely dangerous.

If this tool is subjected to unusually high loads for which it was not designed (e.g. heavy impact or a fall), always check that it is in good condition before continuing work. Check in particular that the fuel system is tight (no leaks) and that the controls and safety devices are working properly. Do not continue operating this machine if it is damaged. In case of doubt, have it checked by your STIHL servicing dealer.

Transporting the Power Tool

Line drawing of a person walking with a long tool, no text or symbols present

This power tool should be carried only in a horizontal position. Grip the shaft in a manner that the machine is balanced horizontally. Keep the hot muffler away from your body and the cutting attachment behind you.

WARNING

Accidental acceleration of the engine can cause the chain to rotate and cause serious injuries.

Always switch off the engine and fit the scabbard over the cutting attachment before transporting the power tool over long distances. When transporting it in a vehicle, properly secure it to prevent turnover, fuel spillage and damage to the unit.

Fuel

Your STIHL power tool uses an oil-gasoline mixture for fuel (see the "Fuel" chapter in this instruction manual).

WARNING

Gasoline is an extremely flammable fuel. If spilled and ignited by a spark or other ignition source, it can cause fire and serious burn injury or property damage. Use extreme caution when handling gasoline or fuel mix. Do not smoke or bring any fire or flame near the fuel or the power tool. Note that combustible fuel vapor may escape from the fuel system.

Fueling Instructions

WARNING

To reduce the risk of fire and serious personal injury, always place the power tool on the ground before attempting to fuel the machine.

WARNING

Pick a Safe Location

To reduce the risk of fire and explosion, fuel your power tool in a well-ventilated area, outdoors away from flames, pilot lights, heaters, electric motors, and other sources of ignition. Vapors can be ignited by a spark or flame many feet away. Select bare ground for fueling and move at least 10 feet (3 m) from the fueling spot before starting the engine. Wipe off any spilled fuel before starting your power tool. Take care not to get fuel on your clothing. If this happens, change your clothing immediately.

Allow the Power Tool to Cool Before Removing the Fuel Cap

WARNING

Gasoline vapor pressure may build up inside the fuel tank. The amount of pressure depends on a number of factors such as the fuel used, altitude and temperature. To reduce the risk of burns and other personal injury from

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escaping gas, vapor and fumes, always shut off the engine and allow it to cool before removing the fuel cap.

The engine is air cooled. When it is shut off, cooling air is no longer drawn across the cylinder and engine temperatures will rise for several minutes before starting to cool. In hot environments, cooling will take longer. To reduce the risk of burns and other personal injury from escaping gas, vapor and fumes, allow the power tool to cool. If you need to refuel before completing a job, turn off the machine and allow the engine to cool before opening the fuel tank.

Fuel Spraying or "Geysering"

WARNING

Removing the cap on a pressurized fuel tank can result in gasoline, vapors and fumes being forcefully sprayed out from the fuel tank in all directions. The escaping gasoline, vapors or fumes can cause serious personal injury, including fire and burn injury, or property damage.

Sometimes also referred to as "fuel geysering," fuel spraying is an expulsion of fuel, vapors and fumes which can occur in hot conditions, or when the engine is hot, and the tank is opened without allowing the power tool to cool adequately. It is more likely to occur when the fuel tank is half full or more.

Pressure is caused by fuel and heat and can occur even if the engine has not been running. When gasoline in the fuel tank is heated (by ambient temperatures, heat from the engine, or other sources), vapor pressure will increase inside the fuel tank.

Some blends of gasoline, particularly those designed for use in winter, are more volatile and may cause tanks to pressurize more quickly or create greater pressure. At higher altitudes, fuel tank pressurization is more likely.

How to Avoid Fuel Spraying

Removing the fuel cap on a pressurized tank can result in gasoline, vapors and fumes being forcefully sprayed out from the fuel tank in all directions. To reduce the risk of burns, serious injuries or property damage from fuel spraying:

– Follow the fueling instructions in this chapter.
- Always assume your fuel tank is pressurized.
- Allow the power tool to cool before removing the fuel cap.
- In hot environments, cooling will take longer.
- The engine is air cooled. When it is shut off, cooling air is no longer drawn across the cylinder and the engine temperature will rise for several minutes before starting to cool.

After the power tool has cooled appropriately, follow the safety instructions in this chapter for removing the cap.

Never remove the fuel filler cap by turning it directly to the open position. First check for residual pressure in the tank by slowly turning the cap approximately 1/2 turn counterclockwise. The cap should be held in place by the threads while allowing residual vapor/pressure to be relieved.

Once the fumes or vapor have been relieved, turn the cap further until it can be removed from the tank opening.

Use only good quality fuel that is appropriate for the season (summer v. winter blends). Some blends of gasoline, particularly winter blends, are more volatile and can contribute to fuel spraying.

Removing the Threaded Fuel Filler Cap

WARNING

After allowing the power tool to cool, remove the fuel filler cap slowly and carefully to allow any remaining pressure build-up in the tank to release:

• While maintaining steady, downward pressure, slowly turn the cap approximately 1/2 turn counterclockwise.
• If any significant venting occurs, immediately re-seal the tank by turning the cap clockwise to the closed position. Allow the power tool to cool further before attempting to open the tank.
• Turn the cap to the open position only after the contents of the tank are no longer under pressure.
• Never remove the cap by turning it directly to the open position. First allow the power tool to cool adequately and then release any residual pressure by slowly turning it approximately 1/2 turn counterclockwise.
• Never attempt to remove the cap while the engine is still hot or running.

Installing the Threaded Fuel Filler Cap

WARNING

Unit vibrations can cause an improperly tightened fuel filler cap to loosen or come off and spill quantities of fuel. To reduce the risk of fuel spillage and fire, tighten the fuel filler cap by hand with as much force as possible.

Damaged or Broken Cap

If your fuel cap does not tighten properly, it may be damaged or broken. Stop using the power tool and take it to your authorized STIHL dealer for repair.

Vapor Lock

WARNING

Vapor lock occurs when fuel in the fuel line or carburetor vaporizes, causing bubbles to block the free flow of liquid fuel into the carburetor. Vapor lock cannot be relieved or affected by opening the fuel tank. Removing the fuel filler cap without first allowing the power tool to cool adequately can result in fuel spraying. Always follow the instructions in this section when removing the fuel cap.

To relieve vapor lock:

• Press the manual fuel pump bulb at least 20 to 30 times – even if the bulb is already filled with fuel – to clear the vapor and send liquid fuel into the carburetor. Then start the power tool. For specific starting instructions, see the appropriate section of your instruction manual.
• If the manual fuel pump bulb will not be filled, place the choke knob to the starting throttle position and pull the starter cord until the engine runs.
• If your power tool will not restart, or if vapor lock occurs again, the power tool is being used in conditions too extreme for the fuel being used. Discontinue use and let the engine cool completely before attempting to start the power tool.

Before Operation

Take off the chain guard (scabbard) and inspect the pole pruner for proper condition and operation. (See the maintenance chart near the end of the instruction manual.)

WARNING

Always check your power tool for proper condition and operation before starting, particularly the throttle trigger, throttle trigger lockout, stop switch and cutting attachment. The throttle trigger must move freely and always spring back to the idle position. Never attempt to modify the controls or safety devices.

WARNING

Check fuel system for leaks, especially the visible parts, e.g., filler cap, hose connections, manual fuel pump (only for power tools equipped with a manual fuel pump). Do not start the engine if there are leaks or damage – risk of fire. Have the power tool repaired by a STIHL servicing dealer before using it.

WARNING

Never operate your power tool if it is damaged, improperly adjusted or maintained, or not completely and securely assembled.

WARNING

Check that the spark plug boot is securely mounted on the spark plug – a loose boot may cause arcing that could ignite combustible fumes and cause a fire.

Keep the handles clean and dry at all times; it is particularly important to keep them free of moisture, pitch, oil, fuel mix, grease or resin in order for you to maintain a firm grip and properly control your power tool.

For proper assembly of the bar and chain follow the procedure described in the chapter "Mounting the Bar and Chain" of this instruction manual.

STIHL Oilomatic chain, guide bar and sprocket must match each other in gauge and pitch.

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WARNING

Proper chain tension is extremely important. In order to avoid improper setting, the tensioning procedure must be followed as described in your manual. Always make sure the hex nut(s) for the sprocket cover is (are) tightened securely after tensioning the chain. Check chain tension once more after having tightened the nut(s). Never start the pole pruner with the sprocket cover loose.

Adjust carrying harness and hand grip to suit your size before starting work.

For specific starting instructions, see the appropriate section of your instruction manual.

Starting

To reduce the risk of serious personal injury from fire, start the engine at least 10 feet (3 m) from the fueling spot, outdoors only.

Start and operate your pole pruner without assistance.

Your power tool is a one-person machine. Do not allow other persons in the general work area, even when starting.

For specific starting instructions, see the appropriate section of your manual.

Line drawing of a person using a power tool to cut a tree in a field (no text or symbols)

Place the pole pruner on firm ground or other solid surface in an open area or, in the alternative, as shown in the above picture. Maintain good balance and secure footing.

WARNING

To reduce the risk of injury from loss of control, do not attempt to "drop start" your power tool. Drop starting means pushing the machine away from the operator, or allowing it to drop toward the ground, while pulling on the starter grip. This method is very dangerous because you may lose control of the machine.

WARNING

To reduce the risk of injury from loss of control be absolutely sure that the guide bar and chain are clear of you and all other obstructions and objects, including the ground, because when the engine starts at starting-throttle, engine speed will be fast enough for the clutch to engage the sprocket and turn the chain.

Once the engine has started, immediately blip the throttle trigger, which should release the starting throttle and allow the engine to slow down to idle.

With the engine running only at idle, attach the power tool to the spring hook of your harness (see appropriate chapter of this manual).

WARNING

When you pull the starter grip, do not wrap the starter rope around your hand. Do not let the grip snap back, but guide the starter rope to permit the rope to rewind properly. Failure to follow this procedure may result in injury to your hand or fingers and may damage the starter mechanism.

Important Adjustments

WARNING

To reduce the risk of personal injury from loss of control or contact with the running cutting tool, do not use your unit with incorrect idle adjustment. At correct idle speed, the saw chain should not move. For directions on how to adjust idle speed, see the appropriate section of your instruction manual.

If you cannot set the correct idle speed, have your STIHL dealer check your power tool and make proper adjustments and repairs.

Proper chain tension is very important at all times. Check it at regular intervals (during work breaks and only when the pole pruner is shut off). If the chain becomes loose while cutting, switch off the engine and then tighten. Never try to tighten the chain while the engine is running.

During Operation

Holding and Controlling the Power Tool

Always hold the unit firmly with both hands on the handles while you are working. Wrap your fingers and thumbs around the handles.

Line drawing of a person holding a long pole, wearing safety goggles and gloves (no text or symbols)

Place your left hand on the shaft and your right hand on rear grip and throttle trigger. Left-handers must follow these instructions, too. Keep your hands in this position to help maintain control of your pole pruner while working at all times.

WARNING

Never attempt to operate your power tool with one hand. Loss of control of the power tool resulting in serious or fatal injury may result.

WARNING

In order to properly control your pole pruner, always maintain good balance and a firm foothold. Never work on a ladder, in a tree or on any other insecure support. Never hold the machine above shoulder height. Do not overreach. When working at a height above 15 feet (4.5 m) use a lift bucket. For pole pruner with adjustable shaft, expand the shaft only as far as necessary for the intended application.

WARNING

Special care must be taken in slippery conditions (wet ground, snow) and in difficult, overgrown terrain. Watch for hidden obstacles such as tree stumps, roots, rocks, holes and ditches to avoid stumbling. For better footing, clear away fallen branches, scrub and cuttings. Be extremely cautious when working on slopes or uneven ground.

WARNING

Take extreme care in wet and freezing weather (rain, snow, ice). Put off the work when the weather is windy, stormy or rainfall is heavy.

Working Conditions

Operate and start your power tool only outdoors in a well-ventilated area. Operate it under good visibility and daylight conditions only. Work carefully.

WARNING

As soon as the engine is running, this machine generates toxic exhaust fumes containing chemicals, such as unburned hydrocarbons (including benzene) and carbon monoxide, that are known to cause respiratory problems, cancer, birth defects, or other reproductive harm and other injuries. Some of the gases (e.g. carbon monoxide) may be colorless and odorless and can cause asphyxiation or death very quickly. To reduce the risk of serious or fatal injury/illness from inhaling toxic fumes, never run the machine indoors or in poorly ventilated locations. If exhaust fumes become concentrated due to insufficient ventilation, clear obstructions from work area to permit proper ventilation before proceeding and / or take frequent breaks to allow fumes to dissipate before they become concentrated.

WARNING

Inhalation of certain dusts, especially organic dusts such as mold or pollen, can cause susceptible persons to have an allergic or asthmatic reaction.

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Substantial or repeated inhalation of dust and other airborne contaminants, in particular those with a smaller particle size, may cause respiratory or other illnesses. This includes wood dust, especially from hardwoods, but also from some softwoods such as Western Red Cedar. Control dust at the source where possible. Use good work practices, such as always cutting with a properly sharpened chain (which produces wood chips rather than fine dust) and operating the unit so that the wind or operating process directs any dust raised by the power tool away from the operator. Follow the recommendations of EPA / OSHA / NIOSH and occupational and trade associations with respect to dust ("particulate matter"). When the inhalation of dust cannot be substantially controlled, i.e., kept at or near the ambient (background) level, the operator and any bystanders should wear a respirator approved by NIOSH / MSHA for the type of dust encountered.

WARNING

Breathing asbestos dust is dangerous and can cause severe or fatal injury, respiratory illness or cancer. The use and disposal of asbestos-containing products have been strictly regulated by OSHA and the Environmental Protection Agency. If you have any reason to believe that you might be cutting asbestos, immediately contact your employer or a local OSHA representative.

WARNING

In order to reduce the risk of personal or even fatal injury to bystanders from falling objects or inadvertent contact with the moving chain of your power tool always keep bystanders at least 50 feet (15 m) away when the power tool is running.

WARNING

Even though bystanders should be kept away from the running saw, never work alone. Keep within calling distance of others in case help is needed.

Stop the engine immediately if you are approached.

DANGER

Your power tool is not insulated against electric shock. To reduce the risk of electrocution, never operate this power tool in the vicinity of any wires or cables (power, etc.) which may be carrying electric current.

Electricity can jump from one point to another by means of arcing. Higher voltage increases the distance electricity can arc. Electricity can also move through branches, especially if they are wet. Maintain a clearance of at least 50 feet (15 m) between the pole pruner (including any branches it is contacting) and any electrical line carrying live current. Before working with less clearance, contact your electric utility and make sure the current is turned off.

Operating Instructions

WARNING

Do not operate your power tool using the starting throttle position, as you do not have control of the engine speed.

In the event of an emergency, switch off the engine immediately by pressing the stop switch.

WARNING

To reduce the risk of cut injuries, keep hands and feet away from the saw chain. Never touch a moving chain with your hand or any other part of your body.

The saw chain continues to move for a short period after the throttle trigger is released (inertia effect).

Accelerating the engine while the chain is blocked increases the load and will cause the clutch to slip continuously. This may result in overheating and damage to important components (e.g. clutch, polymer housing components) – which can then increase the risk of injury from the chain moving while the engine is idling.

WARNING

If the chain becomes clogged, always turn off the engine and make sure the chain has stopped before cleaning.

Make sure that the saw chain does not touch any foreign materials such as rocks, fences, nails and the like. Such objects may be flung off and injure the operator or bystanders, or damage the saw chain.

WARNING

Prior to limbing, clear the working area from interfering limbs and brush. Then, establish an escape area away from where the cut limbs can fall, and remove all obstacles.

Keep work area clear – move away fallen limbs. Place all tools and equipment at a safe distance from the branches being limbed, but not in the escape area.

WARNING

Always observe the general condition of the tree. Look for decay and rot in the trunk and branches. If it is rotted inside, it could snap and fall toward the operator while being cut. Also look for broken or dead branches which could vibrate loose and fall on the operator. If branch is thick or heavy, make a shallow relief cut on the bottom of the branch before cutting down from the top to help prevent splitting of the branch. See chapter on "Using the Unit."

WARNING

To reduce the risk of severe or even fatal injury from falling objects do not cut vertically above your body. Hold the pole pruner at an angle of not more than 60^ from the horizontal level (see picture). Objects may fall in unexpected directions. Do not stand directly underneath the limb being cut.

Watch for falling wood. As soon as the limbed branch starts to fall, step aside and keep a sufficient distance away from the falling wood.

WARNING

Always pull the unit out of the cut with the chain running to reduce the possibility of pinching the cutting attachment. Don't put pressure on the pole pruner when reaching the end of a cut. The pressure may cause the bar and rotating chain to pop out of the cut or kerf, go out of control and strike some other object.

If the bar becomes pinched and caught in the branch so that the chain can no longer move, shut off the pole pruner and carefully move the branch to open the pinch and release the bar.

WARNING

If a rotating saw chain strikes a rock or other hard object, sparks may be created, which can ignite flammable materials under certain circumstances. Flammable materials can include dry vegetation and brush, particularly when weather conditions are hot and dry. When there is a risk of fire or wildfire, do not use a power tool around flammable materials or around dry vegetation or brush. Contact your local fire authorities or the U.S. Forest Service if you have any question about whether vegetation and weather conditions are suitable for the use of a pole pruner.

WARNING

Never modify your muffler. Any modification could cause an increase in heat radiation, sparks or sound level, thereby increasing the risk of fire, burn injury or hearing loss. You may also permanently damage the engine. STIHL

English

recommends having your muffler serviced and repaired by a STIHL servicing dealer.

WARNING

The muffler and other parts of the engine (e.g. fins of the cylinder, spark plug) become hot during operation and remain hot for a while after stopping the engine. To reduce risk of burns, do not touch the muffler and other parts while they are hot. Keep the area around the muffler clean. Remove excess lubricant and all debris such as pine needles, branches or leaves. Let the engine cool down sitting on concrete, metal, bare ground or solid wood (e.g. the trunk of a felled tree) away from any combustible substances.

WARNING

An improperly mounted or damaged cylinder housing or a damaged/deformed muffler shell may interfere with the cooling process of the muffler. To reduce the risk of fire or burn injury, do not continue work with a damaged or improperly mounted cylinder housing or a damaged/deformed muffler shell.

Your muffler is furnished with a spark arresting screen designed to reduce the risk of fire from the emission of hot particles. Never operate your unit with a missing or damaged spark arresting screen. If your gas/oil mix ratio is correct (i.e., not too rich), this screen will normally stay clean as a result of the heat from the muffler and need no service or maintenance. If you experience loss of performance and you suspect a clogged screen, have your

muffler maintained by a STIHL servicing dealer. Some state or federal laws or regulations may require a properly maintained spark arrestor for certain uses. See the "Maintenance, Repair and Storing" section of these Safety Precautions. Remember that the risk of a brush or forest fire is greater in hot or dry conditions.

Reactive Forces

WARNING

Reactive forces may occur any time the chain is rotating. The force used to cut wood can be reversed and work against the operator. If the rotating chain is suddenly stopped by contact with any solid object such as a branch or is pinched, the reactive forces may occur instantly. These reactive forces may result in loss of control, which, in turn, may cause personal injury. An understanding of the causes of these reactive forces may help you avoid the element of surprise and loss of control.

Because of the design of the pole pruner, the reactive forces experienced when working with it are generally not as severe as those encountered with a chainsaw. Nevertheless, you should always maintain a proper grip and good footing to control the power tool when you experience such forces.

The most common reactive forces are:

• kickback,
• pushback,
• pull-in.

Kickback

Kickback may occur when the moving saw chain near the upper quadrant of the bar nose contacts a solid object or is pinched.

The reaction of the cutting force of the chain causes a rotational force on the pole pruner in the direction opposite to the chain movement. This may cause the bar to move upward.

To Avoid Kickback

The best protection from kickback is to avoid kickback situations:

1. Be aware of the location of the guide bar nose at all times.

2. Never let the nose of the guide bar contact any object. Do not cut limbs with the nose of the guide bar. Be especially careful near wire fences and when cutting small, tough limbs, which may easily catch the chain.

3. Cut only one limb at a time.

$$ A = \text { Pull - in } $$

Pull-in occurs when the chain on the bottom of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain pulls the pole pruner forward.

Pull-in frequently occurs when the chain is not rotating at full speed before it contacts the wood.

To Avoid Pull-in

1. Be alert to forces or situations that may cause material to pinch the chain at the bottom of the bar.
2. Always start a cut with the chain rotating at full speed.

B = Pushback

Pushback occurs when the chain on the top of the bar is suddenly stopped when it is pinched, caught or encounters a foreign object in the wood. The reaction of the chain may drive the pole pruner rapidly straight back toward the

operator. Pushback frequently occurs when the top of the bar is used for cutting.

To Avoid Pushback

1. Be alert to forces or situations that may cause material to pinch the chain at the top of the bar.
2. Do not cut more than one limb at a time.
3. Do not twist the bar when withdrawing it from an underbuck cut because the chain can pinch.

MAINTENANCE, REPAIR AND STORING

Maintenance, replacement, or repair of the emission control devices and systems may be performed by any nonroad engine repair establishment or individual. However, if you make a warranty claim for a component which has not been serviced or maintained properly, STIHL may deny coverage.

WARNING

STIHL recommends the use of STIHL replacement parts for maintenance and repair. Use of parts manufactured by others may be extremely dangerous and could result in serious or fatal injury.

Strictly follow the maintenance and repair instructions in the appropriate sections of this instruction manual. Please refer to the maintenance chart in this manual.

WARNING

Always stop the engine and make sure that the chain is stopped before doing any maintenance or repair work or cleaning the power tool. Do not attempt any maintenance or repair work not described in this instruction manual. STIHL recommends that you have such work performed by your STIHL servicing dealer.

Wear gloves when handling or performing maintenance on the cutting attachment.

WARNING

To reduce the risk of fire and burn injury or property damage, use only spark plugs authorized by STIHL. Always press spark plug boot snugly onto spark plug terminal of the proper size. (Note: If terminal has detachable SAE adapter nut, it must be securely attached.) A loose connection between spark plug terminal and the ignition wire connector in the boot may create arcing that could ignite combustible fumes and cause a fire. Keep the spark plug clean and make sure the ignition lead is in good condition.

WARNING

Never test the ignition system with the ignition wire boot removed from the spark plug or with a removed spark plug, since uncontained sparking may cause a fire.

English

WARNING

Do not operate your power tool if the muffler is damaged, missing or modified. An improperly maintained muffler will increase the risk of fire and hearing loss. Your muffler is equipped with a spark-arresting screen to reduce the risk of fire; never operate your power tool if the screen is missing, damaged or clogged. Remember that the risk of a brush or forest fire is greater in hot or dry weather.

In California, it is a violation of § 4442 or § 4443 of the Public Resources Code to use or operate gasoline-powered tools on forest-covered, brush-covered or grass-covered land unless the engine's exhaust system is equipped with a complying spark arrester that is maintained in effective working order. The owner/operator of this product is responsible for properly maintaining the spark arrester. Other states or governmental entities/agencies, such as the U.S. Forest Service, may have similar requirements. Contact your local fire agency or forest service for the laws or regulations relating to fire protection requirements.

WARNING

Keep the chain, bar and sprocket clean; replace worn sprockets or chains. Keep the chain sharp. You can spot a dull chain when easy-to-cut wood becomes hard to cut or burn marks appear on the wood. Keep chain at proper tension.

Tighten all nuts, bolts and screws except the carburetor adjustment screws after each use.

For maintenance items please also refer to the maintenance chart in this manual.

Do not clean your machine with a pressure washer. The solid jet of water may damage parts of the machine.

Store the power tool in a dry and high or locked location out of reach of children.

Before storing for longer than a few days, always empty the fuel tank. See chapter "Storing the machine" in this manual.

Store fuel and chain oil in approved and properly labeled safety-type canisters only. Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor.

Using the Unit

Preparation

●Wear suitable protective clothing. Observe safety precautions.
- Adjust telescoping shaft to the required length (HT 105, HT 135 only).
●Starting the engine.
●Fitting the harness.

Cutting sequence

To allow branches to fall freely, always cut the lower branches first. Prune heavy branches (large diameter) in several controllable pieces.

WARNING

Never stand directly underneath the branch you are cutting – be wary of falling branches. Note that a branch may spring back at you after it hits the ground – risk of injury.

Disposal

Do not throw cuttings into the garbage can – they can be composted.

Working techniques

Hold the control handle with your right hand, and the shaft with your left hand. Your left arm should be extended to the most comfortable position.

Always hold the shaft with your left hand in the area of the handle hose (HT 134).

The shaft should always be held at an angle of 60^ or less.

The least tiring working position is a tool angle of 60^ .

Any lesser angle may be used to suit the situation.

Cross-cut

Medical illustration showing a hand holding a needle and a circular object, with an eye and catheter inserted (no text or symbols)

To avoid pinching the bar in the cut, position the cutting attachment with the housing against the branch and then

perform the cross-cut from the top downwards. The limbing sight helps the operator position the bar and chain for the cut.

Relieving cut

To avoid tearing the bark on thick branches, always start by performing a relieving cut:

●Make the relieving cut (1) on the underside of the branch by positioning the cutting attachment as shown and guiding it down to the bar nose in an arc.

●Make the cross cut (2), positioning the slide with the housing against the branch.

Flush-cutting thick branches

If the branch diameter is more than 10 cm (4 in), first

●Make the undercut (3) and then cross-cut at a distance of about 20 cm (8 in.) (A) from the final cut. Then carry out the flush-cut (4), starting with a relieving cut and finishing with a cross-cut.

English

Cutting above obstacles

Line drawing of a person using a long pole to measure a tree, with water and trees in the background (no text or symbols)

The machine's long reach makes it possible to prune branches that are overhanging obstacles, such as rivers or lakes. The tool angle in this case depends on the position of the branch.

Cutting from a lift bucket

Line drawing of a person spraying water with a long tool, surrounded by trees (no text or symbols)

The machine's long reach enables cutting to be performed next to the trunk without the risk of the lift bucket damaging other branches. The tool angle in this case depends on the position of the branch.

Assembling the Unit

Mounting the Gearbox

• Remove the cap (1) from the square end of the drive tube (2).
• Adjust the length of the drive tube to a = 3.9 in. (10 cm) (HT 105, HT 135).
  ●Mark the drive tube at b = 2.4 in. (6 cm).
  ●Push the gearbox (3) onto the drive tube up to the mark b.

• Align the clamping sleeve (4) (with the clamping screws on the underside of the shaft) and the gearbox (3) (with the oil cap facing up) as shown.
  ●Tighten the screws (5).

If the gearbox cannot be pushed onto the drive tube up to mark b:

• Remove the chain sprocket cover (6) by turning the nut (7) counterclockwise.
  ●Turn the chain sprocket (8) until you can push the gearbox to mark b on the drive tube.
• Replace the chain sprocket cover and secure the nut after mounting the bar and chain.

Mounting the Motor Housing (HT 105, HT 135)

• Remove the cap (9) from the round end of the drive tube (2).
• Rotate the drive tube until it can be inserted through the control handle (10) and into the motor

housing (11). This may require rotating the drive shaft back and forth until they align.

●Push it into the motor housing (11) until c = 0.8 in. (2 cm) and d = 1.2 in. (3 cm).

- Align the motor housing (11), control handle (10) and gearbox (3) as shown. Make sure the fuel cap, stop switch and oil cap are all facing up.

●Tighten the screws (12).

Cutting Attachment

A cutting attachment consists of the saw chain, guide bar and chain sprocket.

The cutting attachment that comes standard is designed to exactly match the pole pruner.

• The pitch (t) of the saw chain (1), chain sprocket and the nose sprocket of the Rollomatic guide bar must match.
• The drive link gauge (2) of the saw chain (1) must match the groove width of the guide bar (3).

If non-matching components are used, the cutting attachment may be damaged beyond repair after a short period of operation.

Chain scabbard

Your pole pruner comes standard with a chain scabbard that matches the cutting attachment.

If you use guide bars of different lengths on the pole pruner, the length of the chain scabbard must be matched to the guide bar to reduce the risk of injury. It should cover the full length of the guide bar.

The length of the matching guide bars is marked on the side of the chain scabbard.

English

Mounting the Bar and Chain

Removing the chain sprocket cover

Technical line drawing of a mechanical device with a central knob and shaft (no text or symbols)

●Unscrew the nut and remove the cover.

●Turn the screw (1) counterclockwise until the tensioner slide (2) butts against the left end of the housing slot, then back it off 5 full turns.

Fitting the saw chain

Illustration of hands fastening a mechanical component with a circular inset showing internal components (no text or symbols)

WARNING

Wear work gloves to protect your hands from the sharp cutters.

●Fit the saw chain – start at the bar nose.

●Fit the guide bar over the screw (3) and engage peg of tensioner slide in the hole (4) – place the saw chain over the chain sprocket (5) at the same time.
●Turn the tensioning screw (1) clockwise until there is very little chain sag on the underside of the bar – and the drive link tangs are engaged in the bar groove.
●Refit the cover and screw on the nut finger-tight.
- Go to chapter on "Tensioning the Saw Chain."

Tensioning the Chain

Retentioning during cutting work:

●Shut off the engine.
- Loosen the nut.
●Hold the bar nose up.
- Use a screwdriver to turn the tensioning screw (1) clockwise until the chain fits snugly against the underside of the bar.
●While still holding the bar nose up, tighten down the nut firmly.
●Go to "Checking Chain Tension."

A new chain has to be retensioned more often than one that has been in use for some time.

- Check chain tension frequently – see chapter on "Operating Instructions."

Checking Chain Tension

●Shut off the engine.
●Wear work gloves to protect your hands.
●The chain must fit snugly against the underside of the bar and it must still be possible to pull the chain along the bar by hand.
- If necessary, retention the chain.

A new chain has to be retensioned more often than one that has been in use for some time.

- Check chain tension frequently – see chapter on "Operating Instructions."

Adjusting the Throttle Cable

It may be necessary to correct the adjustment of the throttle cable after assembling the machine or after a prolonged period of operation.

Adjust the throttle cable only when the unit is completely and properly assembled.

Diagram of a hammer being adjusted with a screwdriver, showing motion direction (no text or symbols)

• Set the throttle trigger to the full throttle position.
  ●Carefully rotate the screw in the throttle trigger in the direction of the arrow until you feel initial resistance. Then rotate it another half turn in the same direction.

English

Fitting the Clip

Clip-On Carrying Ring (only versions with telescoping shaft)

Position of carrying ring

Depending on the shaft length, the following positions are recommended:

• Telescoping shaft compressed, distance A = 15 cm (6 in)
  – Telescoping shaft fully extended, distance B = 50 cm (20 in)

Fitting the clip-on carrying ring

Mechanical component diagram showing a lever mechanism with arrows indicating motion (no text or symbols)

●Squeeze the ends (arrows) together and push carrying ring onto the shaft.

Fuel

This engine is certified to operate on unleaded gasoline and the STIHL two-stroke engine oil at a mix ratio of 50:1.

Your engine requires a mixture of high-quality gasoline and two-stroke air cooled engine oil.

Use mid-grade unleaded gasoline with a minimum octane rating of 89 ((R+M)/2) and no more than 10% ethanol content.

Fuel with an octane rating below 89 may increase engine temperatures. This, in turn, increases the risk of piston seizure and damage to the engine.

The chemical composition of the fuel is also important. Some fuel additives not only detrimentally affect elastomers (carburetor diaphragms, oil seals, fuel lines, etc.), but magnesium castings and catalytic converters as well. This could cause running problems or damage the engine. For this reason STIHL recommends that you use only quality unleaded gasoline.

Gasoline with an ethanol content of more than 10% can cause running problems and major damage in engines and should not be used.

For further details, see

www.STIHLusa.com/ethanol

The ethanol content in gasoline affects engine speed – it may be necessary to readjust the carburetor if you use fuels with various ethanol contents.

WARNING

To reduce the risk of personal injury from loss of control and / or contact with the running cutting tool, do not use your unit with incorrect idle adjustment. At correct idle speed, the cutting tool should not move.

If your power tool's idle speed is incorrectly adjusted, have your authorized STIHL servicing dealer check your machine and make the proper adjustments and repairs.

The idle speed and maximum speed of the engine change if you switch from a fuel with a certain ethanol content to another fuel with a much higher or lower ethanol content.

This problem can be avoided by always using fuel with the same ethanol content.

To ensure the maximum performance of your STIHL engine, use a high quality 2-cycle engine oil, such as STIHL 2-cycle engine oils. STIHL 2-cycle engine oils are specially designed for STIHL engines. To help your engine run cleaner and reduce harmful carbon deposits, STIHL recommends using STIHL HP Ultra 2-cycle engine oil, or use an equivalent high quality 2-cycle engine oil.

To meet the requirements of EPA and CARB we recommend to use STIHL HP Ultra oil or equivalent.

Do not use NMMA or TCW rated (two-stroke water cooled) mix oils or other mix oils that state they are for use in both water cooled and air cooled engines (e.g., outboard motors, snowmobiles, chain saws, mopeds, etc.).

Take care when handling gasoline. Avoid direct contact with the skin and avoid inhaling fuel vapor. When filling at the pump, first remove the container from your vehicle and place the container on the ground before filling. To reduce the risk of sparks from static discharge and resulting fire and/or explosion, do not fill fuel containers that are sitting in or on a vehicle or trailer.

The container should be kept tightly closed in order to limit the amount of moisture that gets into the mixture.

The machine's fuel tank should be cleaned as necessary.

STIHL MotoMix

STIHL recommends the use of STIHL MotoMix. STIHL MotoMix has a high octane rating and ensures that you always use the right gasoline/oil mix ratio.

STIHL MotoMix uses STIHL HP Ultra two-stroke engine oil suited for high performance engines.

For further details, see

www.STIHLusa.com/ethanol

Fuel mix ages

If not using STIHL MotoMix, only mix sufficient fuel for a few days of work, not to exceed 30 days of storage. Store in approved fuel-containers only. When mixing, pour oil into the container first, and then add gasoline. Close the container and shake it vigorously by hand to ensure proper mix of oil and gasoline.

Gasoline Oil (STIHL 50:1 or equivalent high-quality oils)

Liters Liters (ml)

1 0.02 (20)

5 0.10 (100)

10 0.20 (200)

20 0.40 (400)

US gal. US fl. oz.

1	2.6
2	1/2 6.4
5	12.8
Dispose of empty mixing-oil containers only at authorized disposal locations.

Fueling

Removing the cap on a pressurized fuel tank can result in gasoline, vapors and fumes being forcefully sprayed out from the tank in all directions. The escaping gasoline, vapors or fumes, sometimes referred to as fuel spraying or "geysering," can cause serious personal injury, including fire and burn injury, or property damage.

Fuel spraying can occur when the engine is hot and the tank is opened while under pressure. It can occur in hot environments even if the engine has not been running. Spraying is more likely to occur when the fuel tank is half full or more.

Avoid Injuries from Fuel Spraying.

Always follow the fueling instructions in this manual:

• Treat every fuel tank as if it is pressurized, particularly if it is half full or more.
• Always allow the power tool to cool adequately before attempting to open the fuel tank or refueling; this will take longer in hot conditions.

English

• Never remove the cap by turning it directly to the open position. Turn it first approximately 1/2 of a turn counter-clockwise to relieve any residual pressure.
• Never open the fuel tank while the engine is still hot or running.
• Never open the fuel tank or re-fuel the power tool near any sparks, flames or other ignition sources.
• Pick the right fuel: use only good quality (89 octane or higher), fresh fuel blended for the season.
• Vapor lock: do not remove the fuel cap in an effort to relieve vapor lock. Removing the cap has no effect on vapor lock.
• Be aware that fuel spraying is more likely at higher altitudes.

Preparations

Technical line drawing of a mechanical device with no visible text or symbols

●Before fueling, clean the filler cap and the area around it to ensure that no dirt falls into the tank.
- Position the machine so that the filler cap is facing up.

WARNING

In order to reduce the risk of fire and other personal injury from escaping gas vapor and fumes, remove the fuel filler cap slowly and carefully so as to allow any pressure build-up in the tank to release slowly.

Opening

Diagram of a circular device with a rotating arrow indicating rotation, no text or symbols present

WARNING

After allowing the power tool to cool, remove the fuel filler cap slowly and carefully to allow any remaining pressure build-up in the tank to release:

●While maintaining steady, downward pressure, slowly turn the cap approximately a 1/2 turn counter-clockwise.
- If any significant venting occurs, immediately re-seal the tank by turning the cap clockwise to the closed position. Allow the power tool to cool further before attempting to open the tank.
●Turn the cap to the open position only after the contents of the tank are no longer under pressure.
- Remove the fuel filler cap.

WARNING

Never remove the cap by turning it directly to the open position. First allow the power tool to cool adequately and then release any residual pressure by slowly turning the cap approximately 1/2 turn counter-clockwise. Never attempt to remove the cap while the engine is still hot or running.

Refueling

Take care not to spill fuel while fueling and do not overfill the tank – leave approximately 1/2" (13 mm) air space.

Closing

Diagram of a circular device with a rotating arrow indicating rotation, no text or symbols present

WARNING

An improperly tightened fuel filler cap can loosen or come off and spill quantities of fuel. To reduce the risk of fuel spillage and fire from an improperly installed fuel cap, tighten the fuel filler cap by hand with as much force as possible:

- If your fuel cap still does not tighten properly, it may be damaged or broken. Stop using the power tool and take it to your authorized STIHL dealer for repair or replacement.

Chain Lubricant Filling Chain

For automatic and reliable lubrication of the chain and guide bar – use only an environmentally compatible quality chain and bar lubricant. Rapidly biodegradable STIHL BioPlus is recommended.

NOTICE

Biological chain oil must be resistant to aging (e.g. STIHL BioPlus), since it will otherwise quickly turn to resin. This results in hard deposits that are difficult to remove, especially in the area of the chain drive and chain. It may even cause the oil pump to seize.

The service life of the chain and guide bar depends on the quality of the lubricant. It is therefore essential to use only a specially formulated chain lubricant.

WARNING

Do not use waste oil. Renewed contact with waste oil can cause skin cancer. Moreover, waste oil is environmentally harmful.

NOTICE

Waste oil does not have the necessary lubricating properties and is unsuitable for chain lubrication.

Oil Tank

Preparations

Technical line drawing of a mechanical component with no visible text or symbols

●Thoroughly clean the fuel cap and the area around it to ensure that no dirt falls into the tank
- Position the machine so that the fuel cap is facing upwards

To open:

Mechanical assembly diagram showing a rotating component with an arrow indicating rotation (no text or symbols)

• Open the bracket

English

Mechanical component diagram showing a rotating assembly with a curved arrow indicating rotation (no text or symbols)

●Twist fuel cap (ca. 1/4 turn)

Technical diagram of a mechanical component with no visible text or symbols

Markings on fuel cap and oil tank must align

Mechanical component diagram showing a clamping mechanism with an upward arrow (no text or symbols)

• Remove the fuel cap
  Filling up with chain oil
  ●Fill up with chain oil
  Take care not to spill chain oil during refilling and do not overfill the tank.

To close:

Technical diagram of a mechanical component with no visible text or symbols

Clip is in an upright position:

●Fit the fuel cap – marks on the fuel cap and oil tank must line up.
●Push the fuel cap down as far as it will go

●Hold the fuel cap down and twist it clockwise until it engages

Technical diagram of a mechanical component with no visible text or symbols

Then the markings on fuel cap and oil tank will align

• Close the bracket lock

Pure mechanical component diagram without any text, numbers, or symbols

The fuel cap is locked

If the oil level in the tank does not go down, the reason may be a problem in the oil supply system: Check chain lubrication, clean the oilways, contact your dealer for assistance if necessary. STIHL recommends that maintenance and repair work be carried out only by authorised STIHL dealers.

If the fuel cap will not lock onto the oil tank

The base of the fuel cap is tilted in relation to the upper part.

- Remove the fuel cap from the oil tank and look at it from above

Left: Base of fuel cap is tilted – interior marking (1) is aligned with the exterior marking

Right: Bottom of the fuel cap in correct position – inner mark is under the grip. It does not align with the exterior marking

Technical diagram of a mechanical component with curved arrow indicating rotation (no text or symbols)

●Fit fuel cap and twist it counterclockwise until it engages in the seat of the filling port
- Continue to twist the fuel cap counterclockwise (approx. 1/4 turn) – this will twist the base of the cap into the correct position
●Twist the fuel cap clockwise and close it – see section "Closing"

Checking Chain Lubrication

The saw chain must always throw off a small amount of oil.

NOTICE

Never operate without chain lubrication. If the chain runs dry, the whole cutting attachment will be irretrievably damaged within a very short time. Always check chain lubrication and the oil level in the tank before starting work.

Every new chain has to be broken in for about 2 to 3 minutes.

After breaking in the chain, check chain tension and adjust if necessary – see "Checking Chain Tension".

Adjusting the Telescoping Shaft

WARNING

Always shut off the engine and fit the chain scabbard.

Technical diagram of a mechanical device with rotating components and mounting features (no text or symbols)

●Loosen the clamp nut half a turn counterclockwise.
- Adjust the shaft to the required length.
●Tighten the nut clockwise.

English

Fitting the Harness

The type and version of the harness depend on the market.

Shoulder strap (HT 134)

●Put on the shoulder strap (1).
- Adjust the length of the strap.
●With the power tool attached, the carabiner (2) must be at about the same height as your right hip.

Shoulder strap (HT 105, HT 135)

●Put on the shoulder strap (1).
●Adjust the length of the strap.
●With the power tool attached, the carabiner (2) must be at about the same height as your right hip.

Backpack Carrying System

Only versions with fixed shaft

●Put the backpack carrying system (1) on your back and adjust it as described in the instruction leaflet provided.
- Attach the carabiner (2) to the machine's carrying ring.
●Attach the pole pruner to the carrying strap when cutting.

English

• Adjust the hip belt (3), both shoulder straps (4) and the carrying strap (5).
  Only versions with telescoping shaft

●Put the backpack carrying system (1) on your back and adjust it as described in the instruction leaflet provided.
- Attach the carabiner (1) to the carrying ring (2) on the shaft.
●Attach the pole pruner to the carrying strap when cutting.

●Adjust the hip belt (3), both shoulder straps (4) and the carrying strap (5).

●Squeeze the clip together to move it up or down the shaft.

English

Starting / Stopping the Engine

Controls

1 Throttle trigger lockout
2 Throttle trigger
3 Stop switch with Run and Stop positions. Depress the stop switch (_) to switch off the ignition – see "Function of stop switch and ignition system".

Function of stop switch and ignition system

The ignition is switched off and the engine stopped when the stop switch is pressed. The stop switch returns automatically to the Run position when it is released: The ignition is switched on again after the engine stops – the engine is then ready to start.

Starting the Engine

• Press the manual fuel pump bulb (9) at least five times – even if the bulb is already filled with fuel.
  ●Press in the choke knob (8) and turn it to the position that suits the engine temperature:

if the engine is cold

for warm start – also use this position if the engine has been running but is still cold.

Cranking

Line drawing of a person using a long-handled tool to cut a tree, with no text or symbols present.

• Remove the chain scabbard. Check that the chain is not touching the ground or any other obstacles.
  ●Place the unit on the ground: It must rest securely on the engine support and the hook. If necessary, rest the hook on a raised support (e.g. a branch, mound or something similar).

WARNING

Check that nobody is standing within the working range of the pruner.

●Make sure you have a safe and secure footing.
●Hold the unit with your left hand on the fan housing and press it down firmly – your thumb should be under the fan housing.

NOTICE

Do not stand or kneel on the drive tube.

●Hold the starter grip with your right hand.
●Pull the starter grip slowly until you feel it engage and then give it a brisk strong pull.

NOTICE

Do not pull out the starter rope all the way – it might otherwise break.

• Do not let the starter grip snap back. Guide it slowly back into the housing so that the starter rope can rewind properly.
  ●Continue cranking until the engine runs.

As soon as the engine runs

- Press down the throttle trigger lockout and open the throttle – the choke knob moves to the run position I. After a cold start, warm up the engine by opening the throttle several times.

WARNING

Risk of injury from saw chain running when the engine is idling. Adjust the carburetor so that the saw chain does not run when the engine is idling – see "Adjusting the Carburetor".

Your machine is now ready for operation.

Stopping the Engine

- Depress the stop switch – the engine stops – release the stop switch – it springs back to the run position.

Other Hints on Starting

Engine stalls in cold start position or under acceleration.

- Move the choke knob to and continue cranking until the engine runs.

Engine does not start in warm start position ✗

- Move the choke knob to and continue cranking until the engine runs.

If the engine does not start

• Check that all settings are correct.
• Check that there is fuel in the tank and refuel if necessary.
• Check that the spark plug boot is properly connected.
  ●Repeat the starting procedure.
  Engine is flooded
• Move the choke knob to I and continue cranking until the engine runs.

Fuel tank run until completely dry

●After refueling, press the manual fuel pump bulb at least five times – even if the bulb is already filled with fuel.
- Set the choke knob to suit the engine temperature.
●Now start the engine.

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Maintaining and Sharpening the Saw Chain

Cutting effortlessly with a correctly sharpened chain

A properly sharpened chain slices through wood effortlessly and requires very little feed pressure.

Do not work with a dull or damaged chain as it will increase the physical effort required, produce unsatisfactory results and a higher rate of wear.

●Clean the chain.
- Check the chain for cracks in the links and damaged rivets.
- Replace any damaged or worn parts of the chain and match the new parts to the shape and size of the original parts.

Carbide-tipped saw chains (Duro) are particularly wear resistant. STIHL recommends you have your chain resharpened by a STIHL servicing dealer.

WARNING

It is absolutely essential to comply with the angles and dimensions specified below. If the saw chain is incorrectly sharpened – and in particular if the depth gauge is set too low – there is an increased risk of kickback, with resulting risk of injury.

The saw chain cannot be locked in place on the guide bar. Therefore, it is best to remove the chain from the bar and resharpen it on a workshop sharpening tool (FG 2, HOS, USG).

Chain pitch

The chain pitch (a) is marked on the depth gauge end of each cutter.

Mark (a)

C

h

inch mm

7 1/4 P 6.35

1 or 1/4 1/4 6.35

6, P or PM 3/8 P 9.32

2 or 325 0.325 8.25

3 or 3/8 3/8 9.32

Select file diameter according to chain pitch – see table "Sharpening Tools."

You must observe certain angles when resharpening the chain cutter.

Filing and side plate angles

A Filing angle

STIHL saw chains are sharpened to a filing angle of 30^ . Exceptions are ripping chains with a filing angle of 10^ . Ripping chains have an X in their designations.

B Side plate angle

The correct side plate angle is obtained automatically if you use the prescribed file holder and file diameter.

Cutter shapes Angle (°)

	A	B
Micro = semi chisel cutter, e.g. 63 PM3, 26 RM3, 71 PM3	30	75
	i	n
Super = chisel cutter, e.g. 63 PS3, 26 RS, 36 RS3	30	60
Ripping chain, e.g. 63 PMX, 36 RMX	10	75

The angles must be the same on all cutters. If the angles are uneven: Chain will run roughly, not in a straight line, wear quickly and finally break.

File holder

Technical line drawing of a mechanical tool or plunger device (no text or symbols visible)

●Use a file holder

A file holder must be used for manual resharpening (see table "Sharpening Tools"). The correct filing angles are marked on the file holder.

Use only special saw chain sharpening files. Other files have the wrong shape and cut.

For checking angles

Use a STIHL filing gauge (special accessory, see table "Sharpening Tools"). This is a universal tool for checking the filing and side plate angles, depth gauge setting, cutter length and groove depth. It also cleans the guide bar groove and oil inlet holes.

File correctly

• Select sharpening tools according to chain pitch.
• If you use an FG 2, HOS or USG sharpener: Remove the chain from the bar and sharpen according to the instructions supplied with the tool.
• Clamp the bar in a vise if necessary.
  ●Sharpen the chain frequently, take away as little metal as possible – two or three strokes of the file are usually enough.

Technical line drawing of a mechanical component with circular features and a central circular feature (no text or symbols)

●Hold the file horizontally (at a right angle to the side of the guide bar) and file according to the angles marked on the file holder. Rest the file holder on the top plate and depth gauge.
●Always file from the inside to the outside of the cutter.
●The file only sharpens on the forward stroke – lift the file off the cutter on the backstroke.
●Avoid touching the tie straps and drive links with the file.
- Rotate the file at regular intervals while filing to avoid one-sided wear.
●Use a piece of hardwood to remove burrs from the cutting edge.
●Check angles with the filing gauge.
All cutters must be the same length.

If the cutters are not the same length, they will have different heights. This makes the chain run roughly and can cause it to break.

●Find the shortest cutter and then file all other cutters back to the same length. It is best to have this work done by a servicing dealer on an electric grinder.

Depth gauge setting

The depth gauge determines the height at which the cutter enters the wood and thus the thickness of the chip removed.

a Specified distance or setting between depth gauge and cutting edge.

This setting may be increased by 0.2 mm (0.008") for cutting softwood in the mild weather season – no frost.

Chain pitch Depth gauge Setting (a)

inch (mm) mm (inch)

1/4 P (6.35) 0.45 (0.018)

1/4 (6.35) 0.65 (0.026)

3/8 P (9.32) 0.65 (0.026)

0.325 (8.25) 0.65 (0.026)

3/8 (9.32) 0.65 (0.026)

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Lowering depth gauges

The depth gauge setting is reduced when the chain is sharpened.

- Use a filing gauge to check the setting every time you sharpen the chain.

- Place a filing gauge (1) that matches the chain pitch on the chain and press it against the cutter – if the depth gauge projects from the filing gauge, the depth gauge has to be lowered.

Saw chains with humped drive link (2) – upper part of humped drive link (2) (with service mark) is lowered along with the depth gauge.

WARNING

The other parts of the humped drive link must not be filed since this may increase the kickback tendency of the power tool.

Pure technical line drawing of a vehicle component without any text, numbers, or symbols

●File down the depth gauge until it is level with the filing gauge.

Diagram of a tracked vehicle with a circular inset showing a mechanical component (no text or symbols)

- File the top of the depth gauge parallel to the stamped service marking (see arrow) – but do not lower the highest point of the depth gauge in this process.

WARNING

The kickback tendency of the machine is increased if the depth gauges are too low.

Technical line drawing of a vehicle with dashed outline lines indicating components (no text or symbols)

- Place the filing gauge on the chain – the highest point of the depth gauge must be level with the filing gauge.

●After sharpening, clean the chain thoroughly, remove filings or grinding dust – lubricate the chain thoroughly.

●Before a long out-of-service period, clean the chain and store it in a well-oiled condition.

Sharpening Tools (special accessories)
Chain pitch inch (mm)	mm (inch)	Round file ∅ Part No. Part No. Part No. Part No.		File holder No. Part No.	Filing gauge	Flat file	Sharpening kit 1)
1/4 P	(6.35)	3.2	(1/8)	5605 771 3206	5605 750 4300	0000 893 4005	0814 252 3356
1/4	(6.35)	4.0	(5/32)	5605 772 4006	5605 750 4327	1110 893 4000	0814 252 3356
3/8 P	(9.32)	4.0	(5/32)	5605 772 4006	5605 750 4327	1110 893 4000	0814 252 3356
0.325	(8.25)	4.8	(3/16)	5605 772 4806	5605 750 4328	1110 893 4000	0814 252 3356
3/8	(9.32)	5.2	(13/64)	5605 772 5206	5605 750 4329	1110 893 4000	0814 252 3356

1) consisting of file holder with round file, flat file and filing gauge

Operating Instructions Taking

During Break-In Period

A factory-new machine should not be run at high revs (full throttle off load) for the first three tank fillings. This avoids unnecessary high loads during the break-in period. As all moving parts have to bed in during the break-in period, the frictional resistances in the engine are greater during this period. The engine develops its maximum power after about 5 to 15 tank fillings.

During Operation

NOTICE

Do not make the mixture leaner to achieve an apparent increase in power – this could damage the engine – see "Adjusting the Carburetor."

Check chain tension frequently

A new chain has to be retensioned more often than one that has been in use for some time.

Chain cold

Tension is correct when the chain fits snugly against the underside of the bar and can still be pulled along the bar by hand. Retension if necessary – see "Tensioning the Saw Chain."

Chain at operating temperature Care of the Guide Bar

The chain stretches and begins to sag. The drive links must not come out of the bar groove – the chain may otherwise jump off the bar. Retension the chain – see "Tensioning the Saw Chain."

After long period of full-throttle operation

Allow engine to run for a short while at idle speed so that engine heat can be dissipated by the flow of cooling air. This protects engine-mounted components (ignition, carburetor) from thermal overload.

After Finishing Work

●Slacken off the chain if you have retensioned it at operating temperature during cutting work.

NOTICE

Always slacken off the chain after finishing work. The chain contracts as it cools down. If it is not slackened off, it can damage the gear shaft and bearings.

Storing for a short period

Wait for the engine to cool down. Drain the fuel tank. Store the machine in a dry location. Check the tightness of all accessible screws and nuts (not adjusting screws) at regular intervals and retighten if necessary.

Storing for a long period

See chapter on "Storing the Machine."

• Turn the bar over – every time you sharpen the chain and every time you replace the chain – this helps avoid one-sided wear, especially at the nose and underside of the bar.
  ●Regularly clean the oil inlet hole (1), the oilway (2) and the bar groove (3).
  ●Measure the groove depth – with the scale on the filing gauge (special accessory) – in the area used most for cutting.

Chain type Chain pitch Minimum

groove depth

Picco 3/8" P 0.20"

(5.0 mm)

Picco 1/4" P 0.16"

(4.0 mm)

If groove depth is less than specified:

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-Replace the guide bar.

The drive link tangs will otherwise scrape along the bottom of the groove – the cutters and tie straps will not ride on the bar rails.

Replacing the Air Filter

Filters have an average life of more than a year. Do not remove the filter cover or replace the air filter as long as there is no noticeable loss of power.

If there is a noticeable loss of engine power

Engine Management

Exhaust emissions are controlled by the design of the engine and components (e.g. carburation, ignition, timing and valve or port timing).

●Turn the choke knob to 1.
●Loosen the screws (1).
- Remove the filter cover (2).
●Clean away loose dirt from around the filter.
- Remove the filter element (3).
●Replace dirty or damaged filter element (3).
-Replace any damaged parts.

Installing the Filter Element

●Install the filter element (3) in the filter housing and fit the cover.
- Insert the screws (1) and tighten them down firmly.

Adjusting the Carburetor

The carburetor has been set at the factory to provide an optimum fuel-air mixture under most operating conditions.

Adjusting Idle Speed

Engine stops while idling

●Warm up the engine for about 3 minutes.
●Turn the idle speed screw (LA) slowly clockwise until the engine runs smoothly – the saw chain must not rotate.

Chain rotates when engine is idling

●Turn the idle speed screw (LA) counterclockwise until the chain stops running and then turn the screw another 1/2 to 3/4 turn in the same direction.

WARNING

If the chain continues moving when the engine is idling, have your power tool checked and repaired by your servicing dealer.

Spark Arresting Screen in Muffler

WARNING

To reduce the risk of fire caused by hot particles escaping from the machine, never operate the machine without a spark arresting screen, or with the spark arresting screen damaged. Do not modify the muffler or spark arresting screen.

NOTICE

According to the law or regulations in some countries or federal states, certain operations may only be carried out if a properly serviced spark arresting screen is provided.

• If the engine is down on power, check the spark arresting screen in the muffler.
  ●Wait for the muffler to cool down.

●Loosen screw (4).
●Lift the spark arresting screen (5) and pull it out.
●Clean the spark arresting screen (5). If the screen is damaged or heavily carbonized, install a new one.

●Refit the spark arresting screen (5)
●Insert and tighten screw (4)

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Spark Plug

If there is a loss of engine power, the machine is difficult to start or runs poorly at idle, first check the spark plug.

Install a new spark plug after approximately 100 operating hours or earlier if the electrodes are eroded/corroded.

The wrong fuel mix (too much engine oil in the gasoline), a dirty air filter and unfavorable running conditions (mostly at part throttle etc.) affect the condition of the spark plug. These factors cause deposits to form on the insulator nose, which may degrade performance.

Removing the Spark Plug

• Remove the cover (1).
  ●Pull off the spark plug boot (2).
  ●Unscrew the spark plug (3).

Checking the Spark Plug

●Clean dirty spark plug.
- Check electrode gap (A) and readjust if necessary – see chapter "Specifications."
●Use only resistor type spark plugs of the approved range.

Rectify problems which have caused fouling of spark plug:

• too much oil in fuel mix,
  – dirty air filter,
  – unfavorable running conditions, e.g. operating at part load.

WARNING

To reduce the risk of fire and burn injury, use only spark plugs authorized by STIHL. Always press the spark plug boot (1) snugly onto the spark plug terminal (2).

Do not use a spark plug with a detachable SAE adapter terminal (3). Arcing may occur that could ignite combustible fumes and cause a fire. This can result in serious injuries or damage to property.

●Only use resistor type spark plugs with solid, non-threaded terminals

Installing the Spark Plug

●Screw the spark plug (3) into the cylinder.
●Tighten down the spark plug (3) with the combination wrench.

• Press the boot (2) firmly onto the spark plug.
  ●Fit the cover (1) and screw it down firmly.

Storing the Machine Checking and Replacing the Chain Sprocket

For periods of about 30 days or longer

●Drain and clean the fuel tank in a well-ventilated area.
●Dispose of fuel properly in accordance with local environmental requirements.
- If a manual fuel pump is fitted: Press the manual fuel pump at least 5 times.
●Start the engine and run it at idling speed until it stops.
- Remove saw chain and guide bar; clean and spray with protective oil
●Thoroughly clean the machine - pay special attention to the cylinder fins and air filter
- When using biological chain oil (e.g. STIHL BioPlus), fill the lubricant oil tank
●Store the machine in a dry and secure location Keep out of the reach of children and other unauthorized persons

- Remove chain sprocket cover, saw chain and guide bar

Replace the chain sprocket

• replace after using two saw chains or sooner
• if the wear marks (a) are deeper than 0.02 in (0.5 mm) since this would reduce the service life of the saw chain. Use a gauge (special accessory) to check the depth of the wear marks

Using two saw chains in alternation helps preserve the chain sprocket.

STIHL recommends the use of original STIHL chain sprockets.

English

Technical line drawing of a mechanical assembly with gears and housing (no text or symbols)

The chain sprocket is driven via a friction clutch. Have the chain sprocket replaced by an authorized dealer.

STIHL recommends that maintenance and repair work be carried out only by authorized STIHL dealers.

Maintenance and Care

The following intervals apply for normal operating conditions. The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions (extensive dust, etc.).		Before starting work	At the end of work and/or daily	Whenever tank is refilled	Weekly	Monthly	Annually	If faulty	If damaged	As required
Complete machine	Visual inspection (condition, leaks) X		X
	Clean X
Control handle Function test X	X
Air filter	Clean X X
	Replace^2)								X
Manual fuel pump (if present)	check X
	Have repaired by a specialist dealer^1)								X
Fuel pickup body in fuel tank	Have checked by dealer^1)							X
	Have replaced by servicing dealer^1)						X		X	X
Fuel tank Clean X X
Carburetor	Check idle adjustment – chain must not rotate	X		X
	Adjust idle speed X
Spark plug	Adjust electrode gap X
	Replace after every 100 hours of operation
Cooling air intakes	Visual inspection X
	Clean X
Valve clearance^1)	If power is low or cranking effort very high, have valve clearance checked and, if necessary, adjusted by dealer^1)									X
Spark arresting screen in muffler	Check if installed X
	Check or replace^1)						X
All accessible screws, nuts and bolts (not adjusting screws)	Tighten									X

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The following intervals apply for normal operating conditions. The specified intervals must be shortened accordingly when working for longer than normal or under difficult cutting conditions (extensive dust, etc.).		Before starting work	At the end of work and/or daily	Whenever tank is refilled	Weekly	Monthly	Annually	If faulty	If damaged	As required
Anti vibration elements (rubber buffers, springs)	Check X			X						X
	Have replaced by servicing dealer1)								X
Chain lubrication check X
Saw chain	Check, pay attention to sharpness X		X
	Checking the chain tension X	X
	sharpen X
Guide bar	Check (wear, damage) X
	Clean and turn over X	X
	Deburr X
	replace X X
Chain sprocket	check X
	Have replaced by servicing dealer1)									X
Safety information label replace X

1) STIHL recommends STIHL dealers
2) Only if there is a noticeable loss of engine power

Main Parts

1 Handle Hose (HT 134)

2 Fixed Drive Tube (HT 134)

3 Carrying Ring (HT 134)

4 Stop Switch

5 Throttle Trigger Lockout

6 Choke Knob

7 Air Filter Cover

8 Fuel Tank

9 Throttle Trigger

10 Carrying Ring (HT 105, HT 135)

11 Handle Hose (HT 105, HT 135)

12 Telescopic Drive Tube (Shaft) (HT 105, HT 135)

13 Oil Filler Cap

14 Oilomatic Saw Chain

15 Guide Bar

16 Oil Tank

17 Clamp Nut (HT 105, HT 135)

18 Chain Sprocket Cover

19 Hook

20 Chain Guard (Scabbard)

21 Chain Tensioner

22 Limbing Sight

23 Chain Sprocket

24 Machine Support

25 Fuel Tank

26 Fuel Filler Cap

27 Carburetor Adjusting Screws

28 Manual Fuel Pump

29 Starter Grip

30 Cover

31 Muffler (with Spark Arresting Screen)

# Serial Number

English

Definitions

1 Handle Hose (HT 134) For holding and controlling the unit with the hand during operation.
2 Fixed Drive Tube (HT 134) Encloses and protects the drive shaft between the engine and gearbox.
3 Carrying Ring (HT 134) Connects the unit to the harness.
4 Stop Switch Switches the engine's ignition off and stops the engine.
5 Throttle Trigger Lockout Must be depressed before the throttle trigger can be activated.
6 Choke Knob Eases engine starting by enriching mixture.
7 Air Filter Cover Covers and protects the air filter element.
8 Fuel Tank For fuel and oil mixture.
9 Throttle Trigger Controls the speed of the engine.
10 Carrying Ring (HT 105, HT 135) Connects the unit to the harness.
11 Handle Hose (HT 105, HT 135) For holding and controlling the unit with the hand during operation.
12 Telescopic Drive Tube (Shaft) (HT105, HT135) Adjustable drive tube enables user to optimize machine's reach.

13 Oil Filler Cap For closing the oil tank.
14 Oilomatic Saw Chain A loop consisting of cutters, tie straps and drive links.
15 Guide Bar Supports and guides the saw chain.
16 Oil Tank Tank for chain lubricating oil.
17 Clamp Nut (HT 105, HT 135) For adjusting the length of the telescopic drive tube.
18 Chain Sprocket Cover Covers the clutch and chain sprocket.
19 Hook For hooking the machine to a branch and pulling branches away.
20 Chain Guard (Scabbard) To protect the operator from touching the chain.
21 Chain Tensioner Permits precise adjustment of chain tension.
22 Limbing Sight Helps the operator position the bar and chain for the cut.
23 Chain Sprocket The toothed wheel that drives the saw chain.
24 Machine Support For resting machine on the ground.
25 Fuel Tank For fuel and oil mixture.

26 Fuel Filler Cap For closing the fuel tank.

27 Carburetor Adjusting Screws For tuning the carburetor.

28 Manual Fuel Pump Provides additional fuel feed for a cold start.

29 Starter Grip The grip of the pull starter, for starting the engine.

30 Cover Covers and protects the spark plug.

31 Muffler (with Spark Arresting Screen) Muffler reduces exhaust noises and diverts exhaust gases away from operator. Spark arresting screen is designed to reduce the risk of fire.

Specifications

EPA / CEPA

The Emission Compliance Period referred to on the Emissions Compliance Label indicates the number of operating hours for which the engine has been shown to meet Federal emission requirements.

Category

A = 300 hours

B = 125 hours

C = 50 hours

Engine

One-cylinder, four-stroke engine with mixture lubrication

HT 105

Displacement: 31.4 cm ^3

(1.92 cu. in.)

Cylinder bore: 40 mm (1.575 in)

Piston stroke: 25 mm (0.984 in)

Engine power to 1.05 kW (1.40

ISO 8893: bhp) at 7500 rpm

Idle speed acc. to

ISO 11680: 2800 ± 50 rpm

Cut-off speed (nominal value): 9500 rpm

Valve clearance

Inlet valve: 0.10 mm

(0.004 in)

Exhaust valve: 0.10 mm

(0.004 in)

HT 134, HT 135

Displacement: 36.3 cm ^4

(2.22 cu. in.)

Cylinder bore: 43 mm (1.693 in)

Piston stroke: 25 mm (0.984 in)

Engine power to 1.4 kW (1.90

ISO 8893: bhp) at 8500 rpm

Idle speed acc. to

ISO 11680: 2800 ± 50 rpm

Cut-off speed (nomi-

nal value): 9500 rpm

Valve clearance

Inlet valve: 0.10 mm

(0.004 in)

Exhaust valve: 0.10 mm

(0.004 in)

Ignition system

Electronic magneto ignition

HT 105

Spark plug

(suppressed): Bosch USR 7AC

Electrode gap: 0.5 mm

(0.020 in)

HT 134, HT 135

Spark plug

NKG CMR 6H,

(suppressed):

BOSCH USR 4A

C

Electrode gap: 0.5 mm

(0.020 in)

Chain lubrication

Fully automatic, speed-controlled oil pump with rotary piston

Oil tank capacity: 0.22 l (7.4 oz.)

Fuel system

All-position diaphragm carburetor with integral fuel pump

Fuel tank capacity: 0.53 l (17.9 oz.)

Weight

dry, without cutting attachment

HT 105: 7.9 kg (17.4 lbs.)

HT 134: 6.0 kg (13.2 lbs.)

HT 135: 7.9 kg (17.4 lbs.)

Cutting attachments HT 105

Rollomatic E Mini / Rollo Light 01 guide bars

Reduced kickback STIHL guide bars (with green label)

Bar lengths: 25, 30, 35 cm (10, 12, 14 in.)

Pitch: 1/4" P (6.35 mm)

Groove width: 1.1 mm (0.043 in.)

Actual cutting length will be less than listed bar length.

Saw chain 1/4" P

Low kickback STIHL saw chain (with green label)

Picco Micro 3 (71 PM3) Type 3670

Pitch: 1/4" P (6.35 mm)

Drive link gauge: 1.1 mm (0.043 in.)

Chain sprocket

8-tooth for 1/4" P

English

Since new bar/chain combinations may be developed after publication of this Manual, ask your STIHL dealer for the latest STIHL recommendations.

Cutting attachments HT 134, HT 135

Rollomatic E Mini / Rollo Light 01 guide bars

Reduced kickback STIHL guide bars (with green label)

Bar lengths: 25, 30, 35 cm (10, 12, 14 in.)

Pitch: 3/8" P (9.32 mm)

Groove width: 1.1 mm (0.043 in.)

Actual cutting length will be less than listed bar length.

Saw chain 3/8" P

Low kickback STIHL saw chain (with green label)

Picco Micro Mini 3 (61 PMM3)

Type 3610

Pitch: 3/8" P (9.32 mm)

Drive link gauge: 1.1 mm (0.043 in.)

Chain sprocket

7-tooth for 3/8" P

Since new bar/chain combinations may be developed after publication of this Manual, ask your STIHL dealer for the latest STIHL recommendations.

Maintenance and Repairs Disposal

Users of this unit should carry out only the maintenance operations described in this manual. STIHL recommends that other repair work be performed only by authorized STIHL servicing dealers using genuine STIHL replacement parts.

Genuine STIHL parts can be identified by the STIHL part number, the STIHL ^® logo and, in some cases, by the STIHL parts symbol G_6 . The symbol may appear alone on small parts.

For repairs of any component of this unit's air emissions control system, please refer to the air emissions systems warranty in this manual.

Contact the local authorities or your STIHL servicing dealer for information on disposal.

Improper disposal can be harmful to health and pollute the environment.

●Take STIHL products including packaging to a suitable collection point for recycling in accordance with local regulations.

●Do not dispose with domestic waste.

Limited Warranty STIHL Incorporated Federal

Emission Control Warranty Statement

STIHL Incorporated Limited Warranty Policy for Non-Emission-Related Parts and Components

This product is sold subject to the STIHL Incorporated Limited Warranty Policy, available at

www.stihlusa.com/warranty.html

It can also be obtained from your authorized STIHL dealer or by calling 1-800-GO-STIHL (1-800-467-8445).

A separate emissions control system warranty is provided for emission-related components.

Your Warranty Rights and Obligations

The U.S. Environmental Protection Agency (EPA) and STIHL Incorporated are pleased to explain the Emission Control System Warranty on your equipment type engine. In the U.S. new 1997 and later model year small off-road equipment engines must be designed, built and equipped, at the time of sale, to meet the U.S. EPA regulations for small non road engines. The equipment engine must be free from defects in materials and workmanship which cause it to fail to conform with U.S. EPA standards for the first two years of engine use from the date of sale to the ultimate purchaser.

STIHL Incorporated must warrant the emission control system on your small off-road engine for the period of time listed below provided there has been no abuse, neglect or improper maintenance of your small off-road equipment engine.

Your emission control system includes parts such as the carburetor and the ignition system. Also included may be hoses, and connectors and other emission-related assemblies.

Where a warrantable condition exists, STIHL Incorporated will repair your small off-road equipment engine at no cost to you including diagnosis (if the diagnostic work is performed at an authorized dealer), parts and labor.

Manufacturer's Warranty Coverage

In the U.S., 1997 and later model year small off-road equipment engines are warranted for two years. If any emission-related part on your engine is defective, the part will be repaired or replaced by STIHL Incorporated free of charge.

Owner's Warranty Responsibilities

As the small off-road equipment engine owner, you are responsible for the performance of the required maintenance listed in your instruction manual. STIHL Incorporated recommends that you retain all receipts covering maintenance on your small off-road equipment engine, but STIHL Incorporated cannot deny warranty solely for the lack of receipts or for your failure to ensure the performance of all scheduled maintenance.

Any replacement part or service that is equivalent in performance and durability may be used in non-warranty maintenance or repairs, and shall not reduce the warranty obligations of the engine manufacturer.

As the small off-road equipment engine owner, you should be aware, however, that STIHL Incorporated may deny you warranty coverage if your small off-road equipment engine or a part has failed due to abuse, neglect, improper maintenance or unapproved modifications.

You are responsible for presenting your small off-road equipment engine to a STIHL service center as soon as a

English

problem exists. The warranty repairs will be completed in a reasonable amount of time, not to exceed 30 days.

If you have any questions regarding your warranty rights and responsibilities, please contact a STIHL customer service representative at 1-800-467-8445 or you can write to

STIHL Inc. 536 Viking Drive, P.O. Box 2015 Virginia Beach, VA 23450-2015

www.stihlusa.com

Coverage by STIHL Incorporated

STIHL Incorporated warrants to the ultimate purchaser and each subsequent purchaser that your small off-road equipment engine will be designed, built and equipped, at the time of sale, to meet all applicable emissions regulations. STIHL Incorporated also warrants to the initial purchaser and each subsequent purchaser that your engine is free from defects in materials and workmanship which cause the engine to fail to conform with applicable emissions regulations for a period of two years.

Warranty Period

The warranty period will begin on the date the utility equipment engine is purchased by the initial purchaser. Product registration is recommended, so that STIHL has a means to contact you if there ever is a need to communicate repair or recall information about your product, but it is not required in order to obtain warranty service.

If any emission-related part on your engine is defective, the part will be replaced by STIHL Incorporated at no cost to the owner. Any warranted part which is not scheduled for replacement as required maintenance, or which is scheduled only for regular inspection to the effect of "repair or replace as necessary" will be warranted for the warranty period. Any warranted part which is scheduled for replacement as required maintenance will be warranted for the period of time up to the first scheduled replacement point for that part.

Diagnosis

You, as the owner, shall not be charged for diagnostic labor which leads to the determination that a warranted emissions part is defective. However, if you claim warranty for an emissions component and the machine is tested as non-defective, STIHL Incorporated will charge you for the cost of the emission test. Mechanical diagnostic work will be performed at an authorized STIHL servicing dealer. Emission test may be performed either at STIHL Incorporated or at any independent test laboratory.

Warranty Work

STIHL Incorporated shall remedy warranty defects at any authorized STIHL servicing dealer or warranty station. Any such work shall be free of charge to the owner if it is determined that a warranted part is defective.

Any manufacturer-approved or equivalent replacement part may be used for any warranty maintenance or repairs on emission-related parts and must be provided without charge to the owner. STIHL Incorporated is liable for damages to other engine components caused by the failure of an emissions warranted part still under warranty.

The following list specifically defines the emission-related warranted parts:

• Air Filter
  – Carburetor (if applicable)
• Fuel Pump
• Choke (Cold Start Enrichment System) (if applicable)
• Control Linkages
• Intake Manifold
• Magneto or Electronic Ignition System (Ignition Module or Electronic Control Unit)
• Fly Wheel
• Spark Plug
  – Injection Valve (if applicable)
  – Injection Pump (if applicable)
• Throttle Housing (if applicable)
• Cylinder
• Muffler
  – Catalytic Converter (if applicable)
• Fuel Tank
• Fuel Cap
• Fuel Line

• Fuel Line Fittings

• Clamps

• Fasteners

Where to Make a Claim for Warranty Service

Bring the product to any authorized STIHL servicing dealer.

Maintenance Requirements

The maintenance instructions in this manual are based on the application of the recommended 2-stroke fuel-oil mixture (see also instruction "Fuel"). Deviations from this recommendation regarding quality and mixing ratio of fuel and oil may require shorter maintenance intervals.

Limitations

This Emission Control Systems Warranty shall not cover any of the following:

●repair or replacement required because of misuse, neglect or lack of required maintenance,
●repairs improperly performed or replacements not conforming to STIHL Incorporated specifications that adversely affect performance and/or durability, and alterations or modifications not recommended or approved in writing by STIHL Incorporated,

and

●replacement of parts and other services and adjustments necessary for required maintenance at and after the first scheduled replacement point.

Trademarks

STIHL Registered Trademarks

STIHL®

STIHL

G

The color combination orange-grey (U.S. Registrations #2,821,860; #3,010,057, #3,010,058, #3,400,477; and #3,400,476)

MASTERWRENCH | STIHL

SERVICE

AutoCut®

FARM BOSS®

iCademy®

MAGNUM®

MasterWrench Service®

MotoMix®

OIOMATIC®

English

ROCK BOSS®

STIHL Cutquik®

STIHL DUROMATIC®

STIHL Quickstop®

STIHL ROLLOMATIC®

STIHL WOOD BOSS®

TIMBERSPORTS®

WOOD BOSS®

YARD BOSS®

Some of STIHL's Common Law Trademarks

STIHL Injection _TH

4-MIX ^TM

BioPlus ^TM

Easy2Start ™

EasySpool ™

ElastoStart ™

Ematic ^TM

FixCut ^TM

IntelliCarb ™

Master Control Lever ^TM

Micro ^TM

Pro Mark ^TM

Quiet Line ^TM

STIHL M-Tronic ^TM

STIHL OUTFITTERS ^TM

STIHL PICCO ^TM

STIHL PolyCut ^TM

STIHL PowerSweep ^TM

STIHL Precision Series ^TM

STIHL RAPID ^TM

STIHL SuperCut ^TM

TapAction ^TM

TrimCut ^TM

This listing of trademarks is subject to change.

Any unauthorized use of these

trademarks without the express written consent of

Waiblingen is strictly prohibited.

Contenido

Line drawing of a person walking with a long tool or pipe, no text or symbols present

Line drawing of a person using a power tool to cut a tree in a field (no text or symbols)

Line drawing of a person holding a long tool, wearing protective gear and gloves (no text or symbols)

PELIGRO

Diagram showing a hairpin and eye contact mechanism (no text or symbols)

Line drawing of a person using a long-handled tool outdoors near trees and water (no text or symbols)

Line drawing of a person spraying water with a long tool, surrounded by trees (no text or symbols)

Technical line drawing of a mechanical device with a central pin and mounting bracket (no text or symbols)

Illustration of hands fastening a mechanical component with a circular inset showing internal components (no text or symbols)

ADVERTENCIA

Diagram of a hammer being inserted into a screwdriver, showing the tool's rotation (no text or symbols present)

Diagram of a mechanical device with downward arrows indicating motion or force, mounted on a textured surface (no text or symbols)

Technical line drawing of a mechanical assembly with no visible text or symbols

Diagram of a device with a rotating arrow indicating rotation, no text or symbols present

ADVERTENCIA

Diagram of a circular device with a rotating arrow indicating rotation, no text or symbols present

ADVERTENCIA

Technical line drawing of a mechanical component with no visible text or symbols

Mechanical assembly diagram showing a rotating component with an arrow indicating rotation (no text or symbols)

• Abra la palanca.

Diagram of a mechanical component with a curved arrow indicating rotation or movement (no text or symbols)

Technical diagram of a mechanical component with no visible text or symbols

Mechanical component diagram showing a rotating assembly with an upward arrow (no text or symbols)

Technical diagram of a mechanical component with no visible text or symbols

Technical diagram of a mechanical component with no visible text or symbols

Mechanical assembly diagram showing a lever mechanism with an arrow indicating rotational motion (no text or symbols)

Pure mechanical component diagram without any text, numbers, or symbols

Diagram of a mechanical component with a curved arrow indicating rotation (no text or symbols)

Technical diagram of a mechanical device with rotating components and directional arrows (no text or symbols)

Line drawing of a person using a long-handled tool to cut a tree, with no text or symbols present.

Technical line drawing of a mechanical tool or plunger with handle and base (no text or symbols)

- Use un portalimas

Technical line drawing of a mechanical component with circular features and a central circular feature (no text or symbols)

Pure technical line drawing of a mechanical component without any text, numbers, or symbols

Diagram of a mechanical component with a circular inset showing a beam and an upward arrow, no readable text or symbols present.

Line drawing of a vehicle with dashed outline lines and circular cutouts, no text or symbols present

Technical line drawing of a mechanical assembly with gears and housing (no text or symbols)

HT 134: 6,0 kg (13,2 lb)

HT 135: 7,9 kg (17,4 lb)

536 Viking Drive, P.O. Box 2015

MasterWrench Service®

MotoMix®

OIOMATIC®

ROCK BOSS®

STIHL Cutquik®

STIHL DUROMATIC®

STIHL Quickstop®

STIHL ROLLOMATIC®

STIHL WOOD BOSS®

TIMBERSPORTS®

WOOD BOSS®

YARD BOSS®

This product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

WARNING

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

0458-699-8621-A

0458-699-8621-A