CG 33EJ - Hedge trimmers HITACHI - Free user manual and instructions

Product Type	Gas hedge trimmer
Brand	Hitachi
Model	CG 33EJ
Engine	2-stroke, single cylinder
Displacement	33 cm³
Power	1.1 kW (1.5 hp)
Fuel	2-stroke mixture (50:1)
Fuel tank capacity	0.5 L
Cutting length	600 mm
Tooth spacing	30 mm
No-load cutting speed	4,000 rpm
Sound pressure level (LpA)	94 dB(A)
Vibration level (front hand)	5.5 m/s²
Vibration level (rear hand)	6.2 m/s²
Weight (without fuel)	5.2 kg
Dimensions (L × W × H)	1050 × 270 × 230 mm
Blade type	Double steel blade
Safety	Blade brake, safety trigger, hand guard
Maintenance	Air filter cleaning, blade sharpening, draining
Repairability	Spare parts available (spark plug, filter, blade)

Frequently Asked Questions - CG 33EJ HITACHI

What fuel mixture to use for the CG 33EJ hedge trimmer?

Use a mixture of unleaded gasoline (95 or 98) and 2-stroke engine oil at a 50:1 ratio. Follow the proportions to avoid damaging the engine.

How to start the engine of the Hitachi CG 33EJ?

Set the switch to 'ON', close the choke, prime the primer bulb 5 to 6 times, then pull the starter cord firmly. Once started, open the choke.

How to sharpen the hedge trimmer blade?

Remove the blade, secure it in a vise, and use a flat file to sharpen each tooth following the original angle. Always file in the same direction.

How often to replace the spark plug?

The spark plug should be checked every 50 hours of use and replaced if worn or fouled. Use an NGK BPMR7A or equivalent spark plug.

How to clean the air filter?

Unclip the filter cover, remove the foam element, wash it with soapy water, rinse, dry, and lightly oil before reassembling. Clean every 10 hours of use.

Why does the blade get stuck during use?

This can be due to a stuck branch, lack of lubrication, or a dull blade. Clean the blade and check that it is well sharpened. If the blockage persists, turn off the engine and inspect.

What is the maximum branch cutting length?

The 600 mm blade can cut branches up to about 30 mm thick. For thicker branches, use pruning shears or a saw.

How to store the hedge trimmer long-term?

Empty the fuel tank, run the engine until it stops, clean the blade and lubricate it. Store the tool in a dry, dust-free place.

What safety equipment is recommended?

Always wear gloves, safety glasses, ear protection, and safety shoes. Avoid loose clothing that could get caught in the blade.

Where to find spare parts for the CG 33EJ?

Parts such as the blade, spark plug, air filter, and seal kit are available at Hitachi dealers or online from specialized websites. Use the model number to find the correct references.

USER MANUAL CG 33EJ HITACHI

Technical line drawing of a mechanical assembly labeled CG33EJ (LP), showing a shaft and housing assembly without any text or symbols beyond the label.

Read the manual carefully before operating this machine. Lesen Sie vor der Verwendung diese Anleitung sorgfältig durch. Lire attentivement le manuel avant d'utiliser la machine. Leggere attentamente il manuale prima di mettere in funzione questa apparecchiatura. Lees de handleiding zorgvuldig door voordat u de machine bedient. Antes de utilizar esta máquina, lea cuidadosamente el manual. Leia o manual atentamente antes de operar esta máquina. Läs noga igenom bruksanvisningen innan maskinen tas i bruk. Læs denne brugsvejledning omhyggeligt, inden maskinen tages i brug. Bruksanvisningen må leses nøye før bruk av maskinen. Lue ohjekirja huolellisesti ennen koneen käyttämistä.

Handling instructions Bedienungsanleitung Mode d'emploi Istruzioni per l'uso Gebruiksaanwijzing Instrucciones de manejo

Instruções de uso Bruksanvisning Brugsanvisning Bruksanvisning Käyttöohjeet

Hitachi Koki

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Diagram of a mechanical assembly with a tool and component, no visible text or symbols

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

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Line drawing of a sewing machine with a threaded roller and handle (no text or symbols)

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Technical line drawing of a mechanical assembly with labeled parts (no text or symbols present)

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

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

Illustration of two hands holding a device with arrows indicating downward motion (no text or symbols)

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Illustration of a worker in safety gear using a tool to move shoes, with motion arrows indicating movement (no text or symbols)

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Illustration of a person wearing safety harness and helmet, holding a device (no text or symbols)

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Technical line drawing of a mechanical component with an arrow indicating direction (no text or symbols)

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Line drawing of a piston mechanism with crankshaft and valve (no text or symbols)

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Simple line drawing of a mechanical device with a handle and base mount (no text or symbols)

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Simple line drawing of a symmetrical star-like shape with a circular center and an arrow pointing downward (no text or symbols)

Pure mechanical part diagram with no text, numbers, or symbols

Meanings of symbols

NOTE : Some units do not carry them.

	Symbols⚠ WARNINGThe following show symbols used for the machine. Be sure that you understand their meaning before use.
	It is important that you read, fully understand and observe the following safety precautions and warnings. Careless or improper use of the unit may cause serious or fatal injury.		Shows maximum shaft speed. Do not use the cutting attachment whose max rpm is below the shaft rpm.
	Read, understand and follow all warnings and instructions in this manual and on the unit.		Gloves should be worn when necessary, e. g., when assembling cutting equipment.
	Always wear eye, head and ear protectors when using this unit.		Use anti-slip and sturdy footwear.
	Do not use metal/rigid blades when this sign is shown on the unit.		Blade thrust may occur when the spinning blade contacts a solid object in the critical area. A dangerous reaction may occur causing the entire unit and operator to be thrust violently. This reaction is called BLADE THRUST. As a result, the operator may lose control of the unit which may cause serious or fatal injury. Blade thrust is more likely to occur in areas where it is difficult to see the material to be cut.
	Keep all children, bystanders and helpers 15m away from the unit. If anyone approaches you, stop the engine and cutting attachment immediately.
	Be careful of thrown objects.		Indicate handle location. Do not attach handle above this point.
	Fuel and oil mixture.		Do not touch the muffler and surrounding area as they can be very hot.
	Explains choke position. Upper sign indicates choke closed and the lower fully open.		Carburetor adjustment - Idle speed
	Carburetor adjustment - Low speed mixture		Carburetor adjustment - High speed mixture
	Priming pump Guaranteed Sound power level
Before using your machineRead the manual carefully.Check that the cutting equipment is correctly assembled and adjusted.Start the unit and check the carburetor adjustment. See "Maintenance".

Index

What is what? 2

Warnings and safety instructions 3

Specifications.... 4

Assembly procedures .... 5

Operating procedures 6

Maintenance....7

What is what?

Since this manual covers several models, there may be some difference between pictures and your unit. Use the instructions that apply to your unit.

1. Fuel cap
2. Throttle trigger
3. Starter handle
4. Blade guard
5. Cutting attachment
6. Drive shaft tube
7. Handle bar
8. Suspension eyelet
9. Ignition switch
10. Harness
11. Throttle lock
12. Throttle trigger lockout
13. Choke lever
14. Engine
15. Angle transmission
16. Joint case
17. Combi box spanner
18. Handling instructions

Line drawing of a mechanical device with labeled part '10' (no text or symbols on the diagram itself)

Simple line drawing of a device with a bulb and attached tubing, labeled with number 10 (no text or symbols on the diagram itself)

Warnings and safety instructions

Pay special attention to statements preceded by the following words:

WARNING!

Indicates a strong possibility of severe personal injury or loss of life, if instructions are not followed.

CAUTION!

Indicates a possibility of personal injury or equipment damage, if instructions are not followed.

NOTE!

Helpful information for correct function and use.

Operator safety

• Always wear a safety face shield or goggles.
- Always wear heavy, long pants and non-slip boots and gloves. Do not wear loose clothing, jewelry, short pants, sandals or go barefoot. Secure hair so it is above shoulder length.
- Do not operate this tool when you are tired, ill or under the influence of alcohol, drugs or medication.
- Never let a child or inexperienced person operate the machine.
- Wear hearing protection. Pay attention to your surroundings. Be aware of any bystanders who may be signaling a problem. Remove safety equipment immediately upon shutting off engine.
- Wear head protection.
- Never start or run the engine inside a closed room or building. Breathing exhaust fumes can kill.
- Keep handles free of oil and fuel.
- Keep hands away from cutting equipment.
- Do not grab or hold the unit by the cutting equipment.
• Always wear gloves when assembling or disassembling the cutting attachment, otherwise serious personal injury may result.
- When the unit is turned off, make sure the cutting attachment has stopped before the unit is set down.
- When operation is prolonged, take a break from time to time so that you may avoid possible whitefinger disease which is caused by vibration.

WARNING!

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

WARNING!

If you are using any medical electric/electronic devices such as a pacemaker, consult your physician as well as the device manufacturer prior to operating any power equipment.

Unit / machine safety

• Inspect the entire unit/machine before each use. Replace damaged parts. Check for fuel leaks and make sure all fasteners are in place and securely tightened.
• Replace parts that are cracked, chipped or damaged in any way before using the unit/machine.
• Make sure blade guard is properly attachment.
• Keep others away when making carburetor adjustments.
• Use only accessories as recommended for this unit/machine by the manufacturer.

WARNING!

Never modify the unit/machine in any way. Do not use your unit/machine for any job except that for which it is intended.

Fuel safety

• Mix and pour fuel outdoors and where there are no sparks or flames.
• Use a container approved for fuel.
• Do not smoke or allow smoking near fuel or the unit/machine or while using the unit/machine.
• Wipe up all fuel spills before starting engine.

• Move at least 3 m away from fueling site before starting engine.

• Stop engine before removing fuel cap.

• Empty the fuel tank before storing the unit/machine. It is recommended that the fuel be emptied after each use. If fuel is left in the tank, store so fuel will not leak.
• Store unit/machine and fuel in area where fuel vapors cannot reach sparks or open flames from water heaters, electric motors or switches, furnaces, etc.

WARNING!

Fuel is easy to ignite or get explosion or inhale fumes, so that pay special attention when handling or filling fuel.

Cutting safety

• Do not cut any material other than grass and brush.
• Inspect the area to be cut before each use. Remove objects which can be thrown or become entangled.
• For respiratory protection, wear an aerosol protection mask when cutting the grass after insecticide is scattered.
• Keep others including children, animals, bystanders and helpers outside the 15 m hazard zone. Stop the engine immediately if you are approached.
  • Always keep the engine on the right side of your body.
• Hold the unit/machine firmly with both hands.
• Keep firm footing and balance. Do not over-reach.
• Keep all parts of your body away from the muffler and cutting attachment when the engine is running.
• Keep cutting attachment below waist level.
• When relocating to a new work area, be sure to shut off the machine and ensure that all cutting attachments are stopped.
• Never place the machine on the ground when running.
• Always ensure that the engine is shut off and any cutting attachments have completely stopped before clearing debris or removing grass from the cutting attachment.
  • Always carry a first-aid kit when operating any power equipment.
• Never start or run the engine inside a closed room or building and/or near the inflammable liquid. Breathing exhaust fumes can kill.
• Please use the unit/machine in accordance with state and local legislation.

Maintenance safety

• Maintain the unit/machine according to recommended procedures.
• Disconnect the spark plug before performing maintenance except for carburetor adjustments.
• Keep others away when making carburetor adjustments.
• Use only genuine HITACHI replacement parts as recommended by the manufacturer.

CAUTION!

Do not disassemble the recoil starter. You may get a possibility of personal injury with recoil spring.

WARNING!

Improper maintenance could result in serious engine damage or in serious personal injury.

Transport and storage

• Carry the unit/machine by hand with the engine stopped and the muffler away from your body.
• Allow the engine to cool, empty the fuel tank, and secure the unit/machine before storing or transporting in a vehicle.
• Empty the fuel tank before storing the unit/machine, It is recommended that the fuel be emptied after each use. If fuel is left in the tank, store so fuel will not leak.
• Store unit/machine out of the reach of children.
• Clean and maintenance the unit carefully and store it in a dry place
• Make sure engine switch is off when transporting or storing.
• When transporting in a vehicle or storage, cover blade with blade cover.

If situations occur which are not covered in this manual, take care and use common sense. Contact HITACHI Authorized Service Centers if you need assistance.

Specifications

MODEL		CG28EJ (L)/(SL)	CG28EJ	CG33EJ (L)	CG33EJ (SL)	CG33EJ/(S)		CG33EJ (LP)	CG33EJ (SLP)	CG33EJ (P)/(SP)
Engine Displacement (cm3) (ml) 28 32.2 32.2 spark plug Idlling speed (min-1) Recommended max. speed (min-1) 11,000 11,000 11,000 Speed of output shaft (min-1) 8,500 8,500 Max. engine output (kW) 1.05 1.17 1.15		CHAMPION RCJ6Y 3,000 11,000 11,000 8,500		CHAMPION RCJ6Y CHAMPION RCJ6Y 3,000
Fuel tank capacity (cm3) (ml) 700		700				700
Dry weight (kg)		5.2/5.4	6.3	5.3	5.9	6.4/6.5		5.8	6.2	6.7/6.8
Cutting attachment Type / Dia. (mm)		Nylon cord	Metal blade /3Tx255	Nylon cord	Nylon cord	Metal blade /3Tx255	Nylon cord	Nylon cord	Nylon cord	Metal blade /3Tx255	Nylon cord
Sound pressure level LpA (dB (A))	(ISO 22868) Equivalent Uncertainty	95.0 33333	93.8 33333	98.2	98.2	94.7	98.2	96.8	96.8	93.4	96.8
Measured Sound power level LwA (dB (A))	(ISO 22868) Equivalent	110	107	110	110	107	110	109	109	106	109
Guaranteed Sound Power level LwA (dB (A))	(2000/14/EC) Racing	116	116	116	116	116	116	116	116	116	116
Vibration level (m/s)	(ISO 22867) Equivalent (Front handle/Left handle)	6.3	5.1	2.9	5.8	5.7	3.8	3.0	3.6	3.1	1.4
		3.4	5.6	3.3	4.3	6.3	4.3	3.0	2.8	4.2	1.6
		1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5	1.5
		1.9	1.6	2.4	1.8	1.3	1.1	2.1	1.4	1.2	1.3
		1.7	1.3	1.7	5.1	1.5	1.3	1.5	1.1	0.8	0.8
		8.7	7.0	3.3	7.9	7.9	5.2	3.7	4.9	4.2	1.6
		4.4	7.8	4.4	3.3	8.8	5.9	4.0	3.7	5.9	2.1

NOTE : Equivalent noise level/vibration level are calculated as the time-weighted energy total for noise/vibration levels under various working conditions with the following time distribution : 1/2 idle, 1/2 racing.
*All data subject to change without notice.

Assembly procedures

Drive shaft to engine (Fig. 1)

Loosen tube locking bolt (1) about ten turns so that the bolt point will not obstruct drive shaft tube to be inserted. When inserting drive shaft tube, hold the tube locking bolt outward preventing inside fitting from obstructing as well.

Insert the drive shaft into the clutch case of the engine properly until the marked position (2) on the drive shaft tube meets the clutch case.

NOTE!

When it is hard to insert drive shaft up to the marked position on the drive shaft tube, turn drive shaft by the cutter mounting end clockwise or counter-clockwise. Tighten tube locking bolt lining up the hole in the shaft tube.

Then tighten clamp bolt securely (3).

Drive shaft to engine (CG33EJ(SL)(SLP)) (Fig. 1A))

Attach the engine to the clutch case (2) with the four screws or bolts (1) provided.

Installation of handle

WARNING!

When you use steel/rigid blade on straight shaft trimmers or brush cutters, always use barrier bar (2) and shoulder harness with the loop handle. (Fig. 2)

Attach the handle to the drive shaft tube with the angle towards the engine.

Adjust the location to the most comfortable position before operation.

NOTE!

If your unit has handle location label on drive shaft tube, follow indication.

Remove the handle bracket (1) from the assembly. (Fig. 3)

Place the handles and attach the handle bracket with four bolts lightly. Adjust to appropriate position. Then fix it firmly with the bolts.

Put stop cords (3) and throttle wire (1) through protective tube (2), then unhook the hip pad. (Fig. 4)

Throttle wire / stop cord

Remove air cleaner cover. (Fig. 5)

Connect stop cords (1). (Fig. 7)

Connect throttle wire end (1) to carburetor (2). (Fig. 8)

Cover throttle wire and stop cords together with protective tube provided up to air cleaner cover. (Fig. 9)

Throttle cable and stop cord (Fig. 6)

(for CG33EJ (SL))

Connect throttle cables (1) by hooking each cut end of the cables and clamp the jointed part with connector case (2) which locks.

Connect each end of stop cords (3).

NOTE!

When removing connector case, insert coin or minus driver in slot in the middle and twist it.

Installation of blade guard (Fig. 10, 11, 11A, 12)

NOTE!

The guard bracket may come already mounted to the gear case on some models.

Install the blade guard and the bracket spacers (1) (If so equipped) on drive shaft tube against angle transmission. Tighten the guard bracket firmly so that the blade guard does not swing or move down during operation.

Install the blade guard to the guard bracket, which also secures the guard to the gear case using the two guard mounting screws.

CAUTION!

Some blade guards are equipped with sharp line limiters. Be careful with handling it.

NOTE! (Fig. 12)

When using HITACHI aluminum head (CH-100 or CH-300) on your unit, the sharp line limiter (2) (If so equipped) which is included in the tool bag, should be securely fastened to the blade guard using the bolt shown (3).

When using a trimmer head with two piece type blade guard, attach the guard extension to the blade guard. (Fig. 13)

NOTE!

When attaching the guard extension to the blade guard, the sharp line limiter must be removed from the blade guard, (if so installed).

NOTE!

If your unit has guard location label on drive shaft tube, follow the indication.

NOTE!

To remove the guard extension, refer to the drawings. Wear gloves as the extension has a sharp line limiter, then push the four square tabs on the guard one by one in order. (Fig. 14)

Installation of cutting blade (Fig. 15, 16)

(If so equipped)

When installing a cutting blade, make sure that there are no cracks or any damage in it and that the cutting edges are facing the correct direction.

NOTE!

When installing cutter holder cap (1), be sure to set concave side upward.

Insert the allen wrench (2) into the hole of the angle transmission in order to lock the cutter holder (3). Please note that the cutter fixing bolt or nut (4) has left-handed threads, (clockwise to loosen/counter-clockwise to tighten). Tighten the fixing bolt or nut with the box wrench.

NOTE!

If your unit is of a nut securing type and equipped with a cotter pin, the blade must be retained with a new cotter pin (5) each time installed. (Fig. 17)

CAUTION!

Before operation, make sure the blade has been properly installed.

CAUTION!

If your unit is equipped with protection cover under a cutting blade, check it for wear or cracks before operation. If any damage or wear is found, replace it, as it is an article of consumption.

Installation of semi-auto cutting head

NOTE!

For installation see your Owner's manual, provided with the cutting head.

WARNING!

For outstanding performance and reliability, always use Hitachi nylon cutting line. Never use wire or other materials that could become a dangerous projectile.

Installation of the BRAIN cutting head

NOTE!

For installation see your BRAIN Owner's manual, provided with the

BRAIN cutting head.

WARNING!

For HITACHI BRAIN heads or HITACHI alloy head, use only flexible, non-metallic line recommended by the manufacturer. Never use wire or wire ropes. They can break off and become a dangerous projectile.

NOTE!

When using HITACHI alloy head (CH-100), initial cutting line length should be about 17cm each. (Fig. 18)

Operating procedures

Fuel (Fig. 19)

WARNING!

• The trimmer is equipped with a two-stroke engine. Always run the engine on fuel, which is mixed with oil. Provide good ventilation, when fueling or handling fuel.
• Fuel contains highly flammable and it is possible to get the serious personal injury when inhaling or spilling on your body. Always pay attention when handling fuel. Always have good ventilation when handling fuel inside building.

Fuel

• Always use branded 89 octane unleaded gasoline.
- Use genuine two-cycle oil or use a mix between 25:1 to 50:1, please consult the oil bottle for the ratio or HITACHI Authorized Service Centers.
- If genuine oil is not available, use an anti-oxidant added quality oil expressly labeled for air-cooled 2-cycle engine use (JASO FC GRADE OIL or ISO EGC GRADE). Do not use BIA or TCW (2-stroke water-cooling type) mixed oil.
- Never use multi-grade oil (10 W/30) or waste oil.
- Always mix fuel and oil in a separate clean container.

Always start by filling half the amount of gasoline, which is to be used.

Then add the whole amount of oil. Mix (shake) the fuel mixture. Add the remaining amount of gasoline.

Mix (shake) the fuel-mix thoroughly before filling the fuel tank. Mixing amount of two-cycle oil and gasoline

Gasoline (Liter)	Two-cycle oil (ml)
	Ratio 50:1 Ratio	25:1
0.5 10 20	——
1	2	—— 0
2	4	—— 0
4 80 160	——

Fueling

WARNING!

• Always shut off the engine before refueling.
- Slowly open the fuel tank, when filling up with fuel, so that possible over-pressure disappears.
- Tighten the fuel cap carefully, after fueling.
- Always move the trimmer at least 3 m (10 ft.) from the fueling area before starting.

• Always Wash any spilled fuel from clothing immediately with soap.
• Be sure to check any fuel leaking after refueling.

Before fueling, clean the tank cap area carefully, to ensure that no dirt falls into the tank. Make sure that the fuel is well mixed by shaking the container, before fueling.

Starting (Fig. 20, 21, 22)

CAUTION!

Before starting, make sure the cutting attachment does not touch anything.

1. Set ignition switch (1) to ON position. (Fig. 20, 21)
   *Push priming bulb (4) several times so that fuel flows through the bulb or return pipe. (If so equipped) (Fig. 22)
2. With the throttle trigger lockout (2) pressed(if so equipped), pull throttle trigger and push throttle lock (3), then slowly release the throttle trigger then throttle trigger lockout. This is will lock the throttle in starting position.
3. Set choke lever to CLOSED position (5). (Fig. 22)
4. Pull recoil starter briskly, taking care to keep the handle in your grasp and not allowing it to snap back.
5. When you hear the engine want to start, return choke lever to RUN position (open). Then pull recoil starter briskly again.

NOTE!

If engine does not start, repeat procedures from 2 to 5.

1. After starting engine, pull throttle trigger to release throttle lock. Then allow the engine about 2-3 minutes to warm up before subjecting it to any load.

Cutting (Fig. 23, 24, 25, 26)

• When cutting, operate engine at over 6500 rpm. Extended time of use at low rpm may wear out the clutch prematurely.
• Cut grass from right to left.
• Blade thrust may occur when the spinning blade contacts a solid object in the critical area.
  A dangerous reaction may occur causing the entire unit and operator to be thrust violently. This reaction is called BLADE THRUST. As a result, the operator may lose control of the unit which may cause serious or fatal injury. Blade thrust is more likely to occur in areas where it is difficult to see the material to be cut.
• Wear the harness as shown in the figure (if so equipped). The blade turns counter-clockwise, therefore, be advised to operate the unit from right to left for efficient cutting. Keep onlookers out of working area at least 15 m (50 ft.).

NOTE!

Press the quick release button or pull emergency release flap (If so equipped) in the event of emergency. (Fig. 25)

WARNING!

If cutting attachment should strike against stones or other debris, stop the engine and make sure that the attachment

and related parts are undamaged. When grass or vines wrap around attachment, stop engine and attachment and remove them.

Stopping (Fig. 27)

- Decrease engine speed and run at an idle for a few minutes, then turn off ignition switch.

WARNING!

A cutting attachment can injure while it continues to spin after the engine is stopped or power control is released.

When the unit is turned off, make sure the cutting attachment has stopped before the unit is set down.

Maintenance

MAINTENANCE, REPLACEMENT, OR REPAIR OF THE EMISSION CONTROL DEVICES AND SYSTEMS MAY BE PERFORMED BY ANY NON-ROAD ENGINE REPAIR ESTABLISHMENT OR INDIVIDUAL.

Carburetor adjustment (Fig. 28)

WARNING!

The cutting attachment may be spinning during carburetor adjustments.

WARNING!

Never start the engine without the complete clutch cover and tube assembled! Otherwise the clutch can come loose and cause personal injuries.

In the carburetor, fuel is mixed with air. When the engine is test run at the factory, the carburetor is basically adjusted. A further adjustment may be required, according to climate and altitude. The carburetor has one adjustment possibility:

T = Idle speed adjustment screw.

Idle speed adjustment (T)

Check that the air filter is clean. When the idle speed is correct, the cutting attachment will not rotate. If adjustment is required, close (clock-wise) the T-screw, with the engine running, until the cutting attachment starts to rotate. Open (counter-clockwise) the screw until the cutting attachment stops. You have reached the correct idle speed when the engine runs smoothly in all positions well below the rpm when the cutting attachment starts to rotate. If the cutting attachment still rotates after idle speed adjustment, contact HITACHI Authorized Service Centers.

NOTE!

Standard Idle rpm is 2,800\~3,200 min ^-1 .

NOTE!

Some models sold areas with strict exhaust emission regulation do not have high and low speed carburetor adjustments. Such adjustments may allow the engine to be operated outside of their emission compliance limits. For these models, the only carburetor adjustment is idle speed.

For models that equipped with low and high speed adjustments; carburetors are pre set at the factory Minor adjustments may optimize performance based on climate, altitude, etc. Never turn the adjustment screws in increments greater than 90 degrees, as engine damage can result from incorrect adjustment If you are not familiar with type of adjustment-assistance HITACHI Authorized Service Centers.

WARNING!

When the engine is idling the cutting attachment must under no circumstances rotate.

Air filter (Fig. 29)

The air filter must be cleaned from dust and dirt in order to avoid:

• Carburetor malfunctions.
- Starting problems.
• Engine power reduction.
- Unnecessary wear on the engine parts.
• Abnormal fuel consumption.

Clean the air filter daily or more often if working in exceptionally dusty areas.

Cleaning the air filter

Remove the air filter cover and the filter (1). Rinse it in warm soap suds. Check that the filter is dry before reassembly. An air filter that has been used for some time cannot be cleaned completely. Therefore, it must regularly be replaced with a new one. A damaged filter must always be replaced.

Fuel filter (Fig. 30)

Drain all fuel from fuel tank and pull fuel filter line from tank. Pull filter element out of holder assembly and rinse element in warm water with detergent.

Rinse thoroughly until all traces of detergent are eliminated.

Squeeze, do not wring, away excess water and allow element to air dry.

NOTE!

If element is hard due to excessive dirt buildup, replace it.

Spark plug (Fig. 31)

The spark plug condition is influenced by:

• An incorrect carburetor setting.
• Wrong fuel mixture (too much oil in the gasoline)
• A dirty air filter.
• Hard running conditions (such as cold weather).

These factors cause deposits on the spark plug electrodes, which may result in malfunction and starting difficulties. If the engine is low on power, difficult to start or runs poorly at idling speed, always check the spark plug first. If the spark plug is dirty, clean it and check the electrode gap. Re-adjust if necessary. The correct gap is 0.6 mm. The spark plug should be replaced after about 100 operation hours or earlier if the electrodes are badly eroded.

NOTE!

In some areas, local law requires using a resistor spark plug to suppress ignition signals. If this machine was originally equipped with resistor spark plug, use same type of spark plug for replacement.

Angle transmission (Fig. 32)

Check angle transmission or angle gear for grease level about every 50 hours of operation by removing the grease filler plug on the side of angle transmission.

If no grease can be seen on the flanks of the gears, fill the transmission with quality lithium based multipurpose grease up to 3/4. Do not completely fill the transmission.

Blade (Fig. 33)

WARNING!

Wear protective gloves when handling or performing maintenance on the blade.

• Use a sharp blade. A dull blade is more likely to snag and thrust. Replace the fastening nut if it is damaged and hard to tighten.
• When replacing blade, purchase one recommended by HITACHI, with a 25.4mm (one inch) fitting hole.
• When installing saw blade (2), always face the stamped side up. In the case of a 3 or 4 tooth blade (1), it can be used on either side.
• Use correct blade for the type of work.
• When replacing blade, use appropriate tools.
• When cutting edges become dull, re-sharpen or file as shown in figure. Incorrect sharpening may cause excessive vibration.
• Discard blades that are bent, warped, cracked, broken or damaged in any way.

NOTE!

When sharpening blade it is important to maintain an original shape of radius at the base of the tooth to avoid cracking.

Maintenance schedule

Below you will find some general maintenance instructions. For further information please contact HITACHI Authorized Service Centers.

Daily maintenance

• Clean the exterior of the unit.
• Check that the harness is undamaged.
• Check the blade guard for damage or cracks. Change the guard in case of impacts or cracks.

• Check that the cutting attachment is properly centred, sharp, and without cracks. An off-centred cutting attachment induces heavy vibrations that may damage the unit.

• Check that the cutting attachment nut is sufficiently tightened.

• Make sure that the blade transport guard is undamaged and that it can be securely fitted.
• Check that nuts and screws are sufficiently tightened.

Weekly maintenance

• Check the starter, especially cord.
• Clean the exterior of the spark plug.
• Remove the spark plug and check the electrode gap. Adjust it to 0.6 ~mm or change the spark plug.
• Check that the air intake at the starter is not clogged.
• Check that the angle gear is filled with grease up to 3/4.
• Clean the air filter.

Monthly maintenance

• Rinse the fuel tank with gasoline, and clean fuel filter.
• Clean the exterior of the carburetor and the space around it.

Quarterly maintenance

• Clean the cooling fins on the cylinder.
• Clean the fan and the space around it.
• Clean the muffler of carbon.

CAUTION

Cleaning of cylinder fins, fan and muffler shall be done by a HITACHI Authorized Service Centers.

Symbolbedeutungen

Anatomical line drawing of a mechanical device with labeled part '10' (no text or symbols beyond label)

Simple line drawing of a medical device with a label pointing to the number 10 (no text or symbols on the device itself)

Schneiden (Abb. 23, 24, 25, 26)

Line drawing of a mechanical device with labeled part '10' (no text or symbols beyond label)

Débroussaillage (Fig. 23, 24, 25, 26)

Anatomical line drawing of a mechanical device with labeled part '10' (no text or symbols beyond label)

Simple line drawing of a device with a labeled part (10), no text or symbols present

Line drawing of a mechanical device with labeled part '10' (no text or symbols beyond label)

Simple line drawing of a medical device with a label pointing to the number 10 (no text or symbols on the device itself)

Anatomical line drawing of a pelvic bone structure (no text or labels)

Simple line drawing of a device with a bulb and a pepper, labeled with number 10 (no text or symbols on the diagram itself)

Corte (Fig. 23, 24, 25, 26)

Line drawing of a mechanical device with a labeled part (10), no readable text or symbols present.

Simple line drawing of a medical device with a label pointing to the number 10 (no text or symbols on the device itself)

Cortar (Fig. 23, 24, 25, 26)

Anatomical line drawing of a pelvic prosthetic implant or ligament (no text or labels)

Simple line drawing of a device with a bulb and labeled part '10' (no text or symbols beyond label)

Klipning (Fig. 23, 24, 25, 26)

Anatomical line drawing of a mechanical or biological structure with labeled part '10' (no text or symbols beyond the number)

Simple line drawing of a device with a bulb and a pepper, labeled with number 10 (no text or symbols on the diagram itself)

Klipping (Fig. 23, 24, 25, 26)