AT3731C - Grass trimmer DOLMAR - Free user manual and instructions

USER MANUAL AT3731C DOLMAR

ENGLISH (Original instructions) Explanation of general view SPECIFICATIONS

• Due to our continuing program of research and development, the specifications herein are subject to change without notice.

• Specifications and battery cartridge may differ from country to country.

• Weight, with battery cartridge, according to EPTA-Procedure 01/2003

• Even if the sound pressure level listed above is 80 dB (A) or less, the level under working may exceed 80 dB (A). Wear ear protection.

1. Battery cartridge

2. Speed adjusting dial

4. Hanger (suspension point)

6. Lock-off button/lever

24. Most effective cutting area

39. Protector holder attachment

40. Protector attachment

42. Nylon cutting head

Overall length 1,840 mm Applicable cutting tool Nylon cutting head Cutting diameter with nylon cutting head 300 mm Rated voltage D.C. 36 V Net weight 5.1 kg 5.6 kg Standard battery cartridge AP-1815 AP-183/AP-1840 Noise Sound pressure level average Sound power level average Applicable standard Model L

(dB (A)) Uncertainty K (dB (A))

• The declared vibration emission value has been measured in accordance with the standard test method and may be used for comparing one tool with another.

• The declared vibration emission value may also be used in a preliminary assessment of exposure.

• The vibration emission during actual use of the power tool can differ from the declared emission value depending on the ways in which the tool is used.

• Be sure to identify safety measures to protect the operator that are based on an estimation of exposure in the actual conditions of use (taking account of all parts of the operating cycle such as the times when the tool is switched off and when it is running idle in addition to the trigger time). For model AT-3724 U Symbols END116-1 The following show the symbols used for the equipment. Be sure that you understand their meaning before use. ....................... Take particular care and attention. ............ Read instruction manual. ...................... Danger; be aware of thrown objects. ...................... The distance between the tool and bystanders must be at least 15 m. ............... Keep bystanders away. .............. Keep distance at least 15 m. ..................... Avoid kickback. ...................... Wear a helmet, goggles and ear protection. ...................... Wear protective gloves. ...................... Wear sturdy boots with nonslip soles. Steeltoed safety boots are recommended. ...................... Do not expose to moisture. ............. Top permissible tool speed. ............... Only for EU countries Do not dispose of electric equipment or battery pack together with household waste material! In observance of the European Directives, on Waste Electric and Electronic Equipment and Batteries and Accumulators and Waste Batteries and Accumulators and their implementation in accordance with national laws, electric equipment and batteries and battery pack(s) that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility. For European countries only ENH024-8 EC Declaration of Conformity The undersigned, Rainer Bergfeld, as authorized by Dolmar GmbH, declares that the DOLMAR machine(s): Designation of Machine: Cordless Grass Trimmer Model No./Type: AT-3724 U Specifications: see “SPECIFICATIONS” table. are of series production and Conforms to the following European Directives: 2000/14/EC, 2006/42/EC And are manufactured in accordance with the following standards or standardised documents: EN/ISO11806 The technical documentation is on file at: Dolmar GmbH, Jenfelder Straße 38, Abteilung FZ, D-22045 Hamburg The conformity assessment procedure required by Directive 2000/14/EC was in Accordance with annex V. Measured Sound Power Level: 94 dB (A) Guaranteed Sound Power Level: 96 dB (A)

Rainer Bergfeld Managing Director For model AT-3731 C Symbols END020-3 The following show the symbols used for the equipment. Be sure that you understand their meaning before use. .......................Take particular care and attention. ............Read instruction manual. ......................Danger; be aware of thrown objects. ......................The distance between the tool and bystanders must be at least 15 m. ...............Keep bystanders away. ..............Keep distance at least 15 m. Vibration Left hand Right hand Applicable standard Model a

) Uncertainty K (m/s

) Uncertainty K (m/s

)11 ...................... Wear a helmet, goggles and ear protection. ...................... Wear protective gloves. ...................... Wear sturdy boots with nonslip soles. Steeltoed safety boots are recommended. ...................... Do not expose to moisture. ...................... Top permissible tool speed. ............... Never use metal blade. ............... Only for EU countries Do not dispose of electric equipment or battery pack together with household waste material! In observance of the European Directives, on Waste Electric and Electronic Equipment and Batteries and Accumulators and Waste Batteries and Accumulators and their implementation in accordance with national laws, electric equipment and batteries and battery pack(s) that have reached the end of their life must be collected separately and returned to an environmentally compatible recycling facility. For European countries only ENH043-3 EC Declaration of Conformity The undersigned, Rainer Bergfeld, as authorized by Dolmar GmbH, declares that the DOLMAR machine(s): Designation of Machine: Cordless Grass Trimmer Model No./Type: AT-3731 C Specifications: see “SPECIFICATIONS” table. are of series production and Conforms to the following European Directives: 2000/14/EC, 2006/42/EC And are manufactured in accordance with the following standards or standardised documents: EN60335 The technical documentation is on file at: Dolmar GmbH, Jenfelder Straße 38, Abteilung FZ, D-22045 Hamburg The conformity assessment procedure required by Directive 2000/14/EC was in Accordance with annex IV. Notified Body: TÜV Rheinland LGA Products GmbH Tillystraße 2 90431 Nürnberg, Germany Identification number 0197 Measured sound power level: 95 dB (A) Guaranteed sound power level: 96 dB (A)

Rainer Bergfeld Managing Director IMPORTANT SAFETY INSTRUCTIONS GEB068-5 WARNING! Read all safety warnings and all instructions. Failure to follow the warnings and instructions may result in electric shock, fire and/or serious injury. Save all warnings and instructions for future reference. Intended use

1. The cordless grass trimmer/ brushcutter/ string

trimmer is only intended for cutting grass, weeds, bushes and undergrowth. It should not be used for any other purpose such as edging or hedge cutting as this may cause injury. General instructions

1. Never allow people unfamiliar with these instructions,

people (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge to use the tool. Children should be supervised to ensure that they do not play with the tool.

2. Before starting the tool, read this instruction manual to

become familiar with the handling of the tool.

3. Do not lend the tool to a person with insufficient

experience or knowledge regarding handling of brushcutters and string trimmers.

4. When lending the tool, always attach this instruction

5. Handle the tool with the utmost care and attention.

6. Never use the tool after consuming alcohol or drugs,

or if feeling tired or ill.

7. Never attempt to modify the tool.

8. Follow the regulations about handling of brushcutters

and string trimmers in your country. Personal protective equipment (Fig. 1)

1. Wear safety helmet, protective goggles and protective

gloves to protect yourself from flying debris or falling objects.

2. Wear ear protection such as ear muffs to prevent

3. Wear proper clothing and shoes for safe operation,

such as a work overall and sturdy, non-slip shoes. Do not wear loose clothing or jewelry. Loose clothes, jewelry or long hair can be caught in moving parts.

4. When touching the cutting blade, wear protective

gloves. Cutting blades can cut bare hands severely. Work area safety

1. Operate the tool under good visibility and daylight

conditions only. Do not operate the tool in darkness or fog.

2. Do not operate the tool in explosive atmospheres,

such as in the presence of flammable liquids, gases or dust. The tool creates sparks which may ignite the dust or fumes.

3. During operation, never stand on an unstable or

slippery surface or a steep slope. During the cold season, beware of ice and snow and always ensure secure footing.

4. During operation, keep bystanders or animals at least

15 m away from the tool. Stop the tool as soon as someone approaches.

5. Before operation, examine the work area for stones or

other solid objects. They can be thrown or cause dangerous kickback and result in serious injury and/or property damage.

6. WARNING: Use of this product can create dust

containing chemicals which may cause respiratory or other illnesses. Some examples of these chemicals are compounds found in pesticides, insecticides, fertilizers and herbicides. Your risk from these exposures varies, depending on how often you do this type of work. To reduce your exposure to these chemicals: work in a well ventilated area, and work with approved safety equipment, such as those dust masks that are specially designed to filter out microscopic particles. Electrical and battery safety

1. Do not expose the tool to rain or wet conditions. Water

entering the tool will increase the risk of electric shock.

2. Do not use the tool if the switch does not turn it on and

off. Any tool that cannot be controlled with the switch is dangerous and must be repaired.

3. Prevent unintentional starting. Ensure the switch is in

the off-position before installing a battery pack, picking up or carrying the tool. Carrying the tool with your finger on the switch or energising the tool that have the switch on invites accidents.

4. Recharge only with the charger specified by the

manufacturer. A charger that is suitable for one type of battery pack may create a risk of fire when used with another battery pack.

5. Use the tool only with specifically designated battery

packs. Use of any other battery packs may create a risk of injury and fire.

6. When battery pack is not in use, keep it away from

other metal objects, like paper clips, coins, keys, nails, screws or other small metal objects, that can make a connection from one terminal to another. Shorting the battery terminals together may cause burns or a fire.

7. Under abusive conditions, liquid may be ejected from

the battery; avoid contact. If contact accidentally occurs, flush with water. If liquid contacts eyes, seek medical help. Liquid ejected from the battery may cause irritation or burns. Putting into operation

1. Before assembling or adjusting the tool, remove the

2. Before handling the cutter blade, wear protective

3. Before installing the battery cartridge, inspect the tool

for damages, loose screws/nuts or improper assembly. Sharpen blunt cutter blade. If the cutter blade is bent or damaged, replace it. Check all control levers and switches for easy action. Clean and dry the handles.

4. Never attempt to switch on the tool if it is damaged or

not fully assembled. Otherwise serious injury may result.

5. Remove any adjusting key or wrench before turning

the tool on. A wrench or a key left attached to a rotating part of the tool may result in personal injury.

6. Adjust the shoulder harness and hand grip to suit the

operator’s body size.

7. When inserting a battery cartridge, keep the cutting

attachment clear of your body and other object, including the ground. It may rotate when starting and may cause injury or damage to the tool and/or property.

8. Remove any adjusting key, wrench or blade cover

before turning the tool on. An accessory left attached to a rotating part of the tool may result in personal injury. Operation

1. In the event of an emergency, switch off the tool

2. If you feel any unusual condition (e.g. noise, vibration)

during operation, switch off the tool. Do not use the tool until the cause is recognized and solved.

3. The cutting attachment continues to rotate for a short

period after turning the tool off. Don’t rush to contact the cutting attachment.

4. During operation, use the shoulder harness. Keep the

tool on your right side firmly.

5. Do not overreach. Keep proper footing and balance at

all times. Watch for hidden obstacles such as tree stumps, roots and ditches to avoid stumbling.

6. Never work on a ladder or tree to avoid loss of control.

7. If the tool gets heavy impact or fall, check the

condition before continuing work. Check the controls and safety devices for malfunction. If there is any damage or doubt, ask our authorized service center for the inspection and repair.

8. Do not touch the gear case. The gear case becomes

hot during operation.

9. Take a rest to prevent loss of control caused by

fatigue. We recommend taking a 10 to 20-minute rest every hour.

10. When you leave the tool, even if it is a short time,

always remove the battery cartridge. The unattended tool with the battery cartridge installed may be used by unauthorized person and cause serious accident.

11. If grass or branches get caught between the cutting

attachment and guard, always turn the tool off and remove the battery cartridge before cleaning.13 Otherwise the cutting attachment may rotate unintentionally and cause serious injury.

12. If the cutting attachment hits stones or other hard

objects, immediately turn the tool off. Then remove the battery cartridge and inspect the cutting attachment.

13. Check the cutting attachment frequently during

operation for cracks or damages. Before the inspection, remove the battery cartridge and wait until the cutting attachment stops completely. Replace damaged cutting attachment immediately, even if it has only superficial cracks.

14. Never cut above waist height.

15. Before starting the cutting operation, wait until the

cutting attachment reaches a constant speed after turning the tool on.

16. When using metal blades, swing the tool evenly in

half-circle from right to left, like using a scythe.

17. Hold the tool by insulated gripping surfaces only,

because the cutter blade may contact hidden wiring. Cutter blades contacting a “live” wire may make exposed metal parts of the tool “live” and could give the operator an electric shock. Cutting attachments

1. Use an applicable cutting attachment for the job in

hand. – Nylon cutting heads (string trimmer heads) are suitable for trimming lawn grass. – Metal blades are suitable for cutting weeds, high grasses, bushes, shrubs, underwood, thicket, and the like. – Never use other blades including metal multi-piece pivoting chains and flail blades. It may result in serious injury.

2. Always use the cutting attachment guard properly

suited for the cutting attachment used.

3. When using metal blades, avoid “kickback” and

always prepare for an accidental kickback. See the section “Kickback.” Kickback (Blade thrust)

1. Kickback (blade thrust) is a sudden reaction to a

caught or bound cutting blade. Once it occurs, the tool is thrown sideway or toward the operator at great force and it may cause serious injury.

2. Kickback occurs particularly when applying the blade

segment between 12 and 2 o’clock to solids, bushes and trees with 3 cm or larger diameter. (Fig. 2)

3. To avoid kickback:

– Apply the segment between 8 and 11 o’clock. – Never apply the segment between 12 and 2 o’clock. – Never apply the segment between 11 and 12 o’clock and between 2 and 5 o’clock, unless the operator is well trained and experienced and does it at his/her own risk. – Never use cutting blades close to solids, such as fences, walls, tree trunks and stones. – Never use cutting blades vertically, for such operations as edging and trimming hedges. (Fig. 3) Vibration

1. People with poor circulation who are exposed to

excessive vibration may experience injury to blood vessels or the nervous system. Vibration may cause the following symptoms to occur in the fingers, hands or wrists: “Falling asleep” (numbness), tingling, pain, stabbing sensation, alteration of skin color or of the skin. If any of these symptoms occur, see a physician!

2. To reduce the risk of “white finger disease”, keep your

hands warm during operation and well maintain the tool and accessories. Transport

1. Before transporting the tool, turn it off and remove the

battery cartridge. Attach the cover to the cutting blade.

2. When transporting the tool, carry it in a horizontal

position by holding the shaft.

3. When transporting the tool in a vehicle, properly

secure it to avoid turnover. Otherwise damage to the tool and other baggage may result. Maintenance

1. Have your tool serviced by our authorized service

center, always using only genuine replacement parts. Incorrect repair and poor maintenance can shorten the life of the tool and increase the risk of accidents.

2. Before doing any maintenance or repair work or

cleaning the tool, always turn it off and remove the battery cartridge.

3. Always wear protective gloves when handling the

gasoline, benzine, thinner, alcohol or the like for the purpose. Discoloration, deformation or cracks of the plastic components may result.

5. After each use, tighten all screws and nuts.

6. Do not attempt any maintenance or repair not

described in the instruction manual. Ask our authorized service center for such work.

7. Always use our genuine spare parts and accessories

only. Using parts or accessories supplied by a third party may result in the tool breakdown, property damage and/or serious injury.

8. Request our authorized service center to inspect and

maintain the tool at regular interval. Storage

1. Before storing the tool, perform full cleaning and

maintenance. Remove the battery cartridge. Attach the cover to the cutting blade.

2. Store the tool in a dry and high or locked location out

of reach of children.

3. Do not prop the tool against something, such as a

wall. Otherwise it may fall suddenly and cause an injury. First aid

1. Always have a first-aid kit close by. Immediately

replace any item taken from the first aid kit.

2. When asking for help, give the following information:

– Place of the accident – What happened – Number of injured persons – Nature of the injury – Your name14 SAVE THESE INSTRUCTIONS.

DO NOT let comfort or familiarity with product (gained from repeated use) replace strict adherence to safety rules for the subject product. MISUSE or failure to follow the safety rules stated in this instruction manual may cause serious personal injury. IMPORTANT SAFETY

1. Before using battery cartridge, read all

instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using battery.

2. Do not disassemble battery cartridge.

3. If operating time has become excessively shorter,

stop operating immediately. It may result in a risk of overheating, possible burns and even an explosion.

4. If electrolyte gets into your eyes, rinse them out

with clear water and seek medical attention right away. It may result in loss of your eyesight.

5. Do not short the battery cartridge:

(1) Do not touch the terminals with any conductive material. (2) Avoid storing battery cartridge in a container with other metal objects such as nails, coins, etc. (3) Do not expose battery cartridge to water or rain. A battery short can cause a large current flow, overheating, possible burns and even a breakdown.

6. Do not store the tool and battery cartridge in

locations where the temperature may reach or exceed 50°C (122°F).

7. Do not incinerate the battery cartridge even if it is

severely damaged or is completely worn out. The battery cartridge can explode in a fire.

8. Be careful not to drop or strike battery.

9. Do not use a damaged battery.

10. Follow your local regulations relating to disposal

of battery. SAVE THESE INSTRUCTIONS. Tips for maintaining maximum battery life

1. Charge the battery cartridge before completely

discharged. Always stop tool operation and charge the battery cartridge when you notice less tool power.

2. Never recharge a fully charged battery cartridge.

Overcharging shortens the battery service life.

3. Charge the battery cartridge with room

temperature at 10°C - 40°C (50°F - 104°F). Let a hot battery cartridge cool down before charging it.

4. Charge the battery cartridge once in every six

• Always be sure that the tool is switched off and the battery cartridge is removed before adjusting or checking function on the tool. Failure to switch off and remove the battery cartridge may result in serious personal injury from accidental start-up. Installing or removing battery cartridge (Fig. 5) CAUTION:

• Always switch off the tool before installing or removing of the battery cartridge.

• Hold the tool and the battery cartridge firmly when installing or removing battery cartridge. Failure to hold the tool and the battery cartridge firmly may cause them to slip off your hands and result in damage to the tool and battery cartridge and a personal injury. To remove the battery cartridge, slide it from the tool while sliding the button on the front of the cartridge. To install the battery cartridge, align the tongue on the battery cartridge with the groove in the housing and slip it into place. Insert it all the way until it locks in place with a little click. If you can see the red indicator on the upper side of the button, it is not locked completely. CAUTION:

• Always install the battery cartridge fully until the red indicator cannot be seen. If not, it may accidentally fall out of the tool, causing injury to you or someone around you.

• Do not install the battery cartridge forcibly. If the cartridge does not slide in easily, it is not being inserted correctly. NOTE:

• The tool does not work with only one battery cartridge. Tool/battery protection system The tool is equipped with a tool/battery protection system. This system automatically cuts off power to the motor to extend tool and battery life. The tool will automatically stop during operation if the tool or battery are placed under one of the following conditions. In some conditions, the indicators light up. Overload protection When the tool is operated in a manner that causes it to draw an abnormally high current, the tool automatically stops and battery indicators blink. In this situation, turn the tool off and stop the application that caused the tool to become overloaded. Then turn the tool on to restart. Overheat protection for tool (Fig. 6) When the tool is overheated, the tool stops automatically and the power indicator blinks about 60 seconds. In this situation, let the tool cool before turning the tool on again. Overheat protection for battery When the battery is overheated, the tool stops automatically and the battery indicators light up. The tool does not start even if pulling the switch trigger. In this15 situation, let the battery cool before turning the tool on again. NOTE: The battery overheat protection works only with a battery cartridge with a star marking. (Fig. 7) Overdischarge protection When the battery capacity becomes low, the tool stops automatically. If the product does not operate even when the switches are operated, remove the batteries from the tool and charge the batteries. Remaining battery capacity indication (Fig. 8) Press the check button to make the battery indicators show the remaining battery capacities. The battery indicators correspond to each battery. Remaining battery capacity indication

Abnormal indications during use

The indicators show various states using the remaining battery capacity indication. Power switch action

• Before inserting the battery cartridge into the tool, always check to see that the switch trigger actuates properly and returns to the “OFF” position when released. Do not pull the switch trigger hard without turning the lock-off lever. This can cause switch breakage. Operating a tool with a switch that does not actuate properly can lead to loss of control and serious personal injury. Push the power button on the housing so that the tool is powered on and power indicator lights. (Fig. 6) For model AT-3724 U (Fig. 9) For model AT-3731 C (Fig. 10) To prevent the switch trigger from being accidentally pulled, a lock-off lever is provided. To start the tool, turn the lock-off lever and then pull the switch trigger. Release the switch trigger to stop. NOTE:

• After the power button is pushed and the tool is left one minute without any operations, the tool is automatically powered off. Battery indicators (Battery 1 or Battery 2) Remaining capacity : On : Off : Blinking 50% to 100% 20% to 50% 0% to 20%

Charge the battery Battery indicator Status: On : Off Battery 1 Battery 2 The tool may have malfunctioned. The tool may have malfunctioned. The protective function for battery with star marking operated (overheat). Few remaining capacity, charge the battery. The tool detected an abnormally high voltage. Replace battery cartridge.16 Reversing Switch for Debris Removal

• Always be sure that the tool is switched off and battery cartridge is removed before removing weeds or debris entangled in the tool that could not be removed when operated in the reverse mode. Failure to switch off and remove the battery cartridge may result in serious personal injury from accidental start-up. For model AT-3724 U (Fig. 11) For model AT-3731 C (Fig. 12) This tool has a reversing switch which is only provided to change the direction of rotation so that it can be used to remove weeds and debris entangled in the tool. To operate the tool normally the “A” side of the switch should be depressed. To remove weeds and debris that are jammed in the rotating head the tool can be reversed by depressing the “B” side of the switch. In the reverse position the tool will only operate for a short period of time and automatically shut off. NOTICE:

• Always check the direction of rotation before operation.

• Use the reversing switch only after the tool comes to a complete stop. Changing the direction of rotation before the tool stops may damage it. Speed adjusting dial (Fig. 13) The tool speed can be adjusted by turning the adjusting dial. Turn the speed adjusting dial clockwise for higher speed, and counterclockwise for lower speed. Nylon cutting head (optional accessory for a product that comes with a cutter blade) Nylon cutting head NOTICE:

• Do not attempt to bump feed the head while the tool is operating at a high RPM. Bump feeding at a high RPM may cause damage to the nylon cutting head.

• The bump feed will not operate properly if the head is not rotating. (Fig. 14) The nylon cutting head is a dual string trimmer head provided with a bump & feed mechanism. To cause the nylon cord to feed out, the cutting head should be bumped against the ground while rotating at a low RPM. NOTE: If the nylon cord does not feed out while bumping the head, rewind/replace the nylon cord by following the procedures described under “Maintenance.” ASSEMBLY

• Always be sure that the tool is switched off and battery cartridge is removed before carrying out any work on the tool. Failure to switch off and remove the battery cartridge may result in serious personal injury from accidental start-up.

• Never start the tool unless it is completely assembled. Operation of the tool in a partially assembled state may result in serious personal injury from accidental start-up. Installing the handle For model AT-3724 U (Fig. 15) Insert the shaft of the handle into the grip as shown. Align the screw hole in the grip with the one in the shaft. Tighten the screw securely. Fit the barrier and grip onto the shaft pipe with four screws. Make sure that the spacer on the shaft pipe is located between the grip/barrier assembly and the hanger. Place handle between handle clamp and handle holder. Adjust the handle to an angle that provides a comfortable working position and then secure by firmly hand- tightening knob. (Fig. 16) For model AT-3731 C (Fig. 17) Fit the grip onto the shaft pipe and tighten it with two hex bolts. Make sure that the spacer on the shaft pipe is located between the grip assembly and the other grip. Do not remove or shrink the spacer. Installing the guard

• Never use the tool without the guard illustrated in place. Failure to do so can cause serious personal injury. For cutter blade (only for model AT-3724 U) (Fig. 18) Install the protrusion of the protector clamp to the gear case until aligning the position with the label on the pipe. Fix the protector to the protector clamp with the two bolts and then tighten both bolts by the hex wrench evenly. (Fig. 19) For nylon cutting head For AT-3731 C (Fig. 20) Align the protrusions on the protector attachment with the grooves of the protector. Align the protrusions on the protector holder attachment with the groove of the protector holder. (Fig. 21) After attaching the protector and the protector holder, tighten the hex bolts securely. (Fig. 22) For AT-3724 U (optional accessory) Remove the hex bolts with hex wrench. Then remove the protector clamp and protector. (Fig. 23) Install the protector attachment and protector holder attachment to the gear case. To install the protector for nylon cutting head, follow the installing method mentioned previously. (Fig. 24) Installing the wire guard CAUTION:

• Before adjusting the wire guard, wait for the cutting head comes to standstill. Do not adjust the wire guard with your foot. To reduce the risk damaging the objects in front of the cutting head, insert the wire guard so that it controls the cutting range of the mowing line. (Fig. 25)17 Slightly expand the wire guard outward and then insert it into the holes of the protector. (Fig. 26) NOTE:

• Do not expand the wire guard outward too much. Otherwise it may break. When wire guard is not in use, lift it for the idle position. (Fig. 27) Installing nylon cutting head CAUTION:

• If during operation the nylon cutting head accidentally impacts a rock or hard object the trimmer should be stopped and inspected for any damage. If the nylon cutting head is damaged it should be replaced immediately. Use of a damaged nylon cutting head could result in serious personal injury. NOTICE:

• Be sure to use genuine Dolmar nylon cutting head. Turn the tool upside down so that you can replace the nylon cutting head easily. Insert the hex wrench through the hole on the protector cover and rotate the receive washer until it is locked with the hex wrench. The nylon cutting head onto the threaded spindle directly and tighten it by turning it counterclockwise. Remove the hex wrench. To remove the nylon cutting head, turn the nylon cutting head clockwise while holding the receive washer with the hex wrench. (Fig. 28) Installing the cutter blade (country specific)

• The outside diameter of the cutter blade must be 230 mm. Never use any blade exceeding 230 mm in outside diameter. CAUTION:

• The cutter blade must be well polished, free of cracks or breakage. Polish or replace the cutter blade every three hours of operation.

• Always wear gloves when handling the cutter blade.

• Always attach the blade cover when the tool is not in use or is being transported.

• The cutter blade-fastening nut (with spring washer) wears out in course of time. If there appears any wear or deformation on the spring washer, replace the nut. Ask your local authorized service center to order it. NOTICE:

• Be sure to use genuine Dolmar cutter blade. Turn the tool upside down so that you can replace the cutter blade easily. To dismount the cutter blade, insert the hex wrench through the hole on the protector cover and the gear case. Rotate the receive washer until it is locked with the hex wrench. Loosen the hex nut (left-hand thread) with the socket wrench and remove the nut, clamp washer and hex wrench. (Fig. 29) Mount the cutter blade onto the shaft so that the guide of the receive washer fits in the arbor hole in the cutter blade. Install the clamp washer and secure the cutter blade with the hex nut with 13 to 23 Nm of tightening torque during holding the receive washer with hex wrench. (Fig. 30) Make sure that the blade is the left way up. (Fig. 31) Hex wrench storage (Fig. 32) When not in use, store the hex wrench as shown in the figure to keep it from being lost. OPERATION Correct handling of tool (AT-3724 U) Correct posture

• Always position the tool on your right-hand side so that the shaft of the left handle is always in front of your body. Correct positioning of the tool allows for maximum control and will reduce the risk of serious personal injury caused by kickback. As shown in the figure fit the shoulder harness and hang the tool firmly on your right side so that the shaft of the left handle is always ahead of you. (Fig. 33) Attachment of shoulder harness (Fig. 34) Wear the shoulder harness on your back and buckle it up until a click is heard. Make sure that it cannot be taken off with pulling it off. Hang the tool as shown.

• Be extremely careful to maintain control of the tool at this time. Do not allow the tool to be deflected toward you or anyone in the work vicinity. Failure to do so could result in serious injury. Adjustment of the hanger position and shoulder harness When replacing battery or accessories with others, the weight balance of the tool may change. In such case, adjust the hanger position and shoulder harness length as follows. To change the hanger position, loosen the fixing screw on the hanger with the supplied wrench and then move the hanger and the cushion. The cushion can be moved easily by twisting it. Adjust the hanger position and shoulder harness length so that: (Fig. 35) – the hanger positions 750 mm or higher from the ground, – the cutting tool positions 100 mm to 300 mm high from the ground and – the unguarded part of cutting tool is horizontally 750 mm or farther away from the hanger. After adjusting the hanger position, tighten the screw with the wrench securely. Correct handling of tool (AT-3731 C) Correct posture

• Always position the tool on your right-hand side so that the barrier is always in front of your body. Correct positioning of the tool allows for maximum control and will reduce the risk of serious personal injury caused by kickback.18 As shown in the figure, put the shoulder harness on your left shoulder by putting your head and right arm through it and keep the tool on your right side while always keeping the barrier in front of your body. (Fig. 36) Attachment of shoulder harness (Fig. 37) After putting the shoulder harness on it can be attached to the tool by connecting the buckles provided on both the tool hook and the harness. Be sure that the buckles click and lock completely in place. Detachment (Fig. 38) The buckle is provided with a means of quick release which can be accomplished by simply squeezing the sides and the buckle.

• Be extremely careful to maintain control of the tool at all times. Do not allow the tool to be deflected toward you or anyone in the work vicinity. Failure to keep control of the tool could result in serious injury to the bystander and the operator. MAINTENANCE

• Always be sure that the tool is switched off and battery cartridge is removed before attempting to perform inspection or maintenance on the tool. Failure to switch off and remove the battery cartridge may result in serious personal injury from accidental start-up. NOTICE: Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result. Supply of grease to gear case (Fig. 39) Supply grease (Shell Alvania 2 or equivalent) to the gear case. Remove the hex bolt and then put grease through the grease hole every 30 hours. (Genuine Dolmar grease may be purchased from your Dolmar dealer.) Replacing the nylon cord

• Make sure that the cover of the nylon cutting head is secured to the housing properly as described below. Failure to properly secure the cover may cause the nylon cutting head to fly apart resulting in serious personal injury. Take off cover from housing, pressing two latches which are slotted section oppositely on side of housing. (Fig. 40) Cut a nylon line in 3-6 m. Fold the cutting line in two halves, leave one of half longer 80-100 mm than another. (Fig. 41) Hook the middle of the new nylon cord to the notch located at the center of the spool between the 2 channels provided for the nylon cord. Wind both ends firmly around the spool in the direction marked on the head for left hand direction indicated by LH. (Fig. 42) Wind all but about 100 mm of the cords, leaving the ends temporarily hooked through a notch on the side of the spool. (Fig. 43) Mount the spool on the cover so that the grooves and protrusions on the spool match up with those on the cover. Now, unhook the ends of the cord from their temporary position and feed the cords through the eyelets to come out of the cover. (Fig. 44) Align the protrusion on the underside of the cover with the slots of the eyelets. Then push the cover firmly onto the housing to secure it. Make sure the latches fully spread in the cover. (Fig. 45) To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjustment should be performed by DOLMAR Authorized Service Centers, always using DOLMAR replacement parts. TROUBLE SHOOTING Before asking for repairs, conduct your own inspection first. If you find a problem that is not explained in the manual, do not attempt to dismantle the tool. Instead, ask Dolmar Authorized Service Centers, always using Dolmar replacement parts for repairs.19

OPTIONAL ACCESSORIES CAUTION:

• These accessories or attachments are recommended for use with your Dolmar tool specified in this manual. The use of any other accessories or attachments might present a risk of injury to persons. Only use accessory or attachment for its stated purpose. If you need any assistance for more details regarding these accessories, ask your local Dolmar Service Center.

• Nylon cord (cutting line)

• Dolmar genuine battery and charger NOTE:

• Some items in the list may be included in the tool package as standard accessories. They may differ from country to country. Malfunction status Cause Action Motor does not run. Battery cartridges are not installed. Install the battery cartridges. Battery problem (under voltage) Recharge the battery cartridge. If recharging is not effective, replace battery cartridge. The drive system does not work correctly. Ask your local authorized service center for repair. Motor stops running after a little use. Rotation is in reverse. Change the direction of ratation with the reversing switch. Battery’s charge level is low. Recharge the battery cartridge. If recharging is not effective, replace battery cartridge. Overheating. Stop using of tool to allow it to cool down. It does not reach maximum RPM. Battery is installed improperly. Install the battery cartridge as described in this manual. Battery power is dropping. Recharge the battery cartridge. If recharging is not effective, replace battery cartridge. The drive system does not work correctly. Ask your local authorized service center for repair. Cutting tool does not rotate: stop the machine immediately! Foreign object such as a branch is jammed between the guard and the nylon cutting head. Remove the foreign object. Cutter blade fastening nut is loose. Tighten the nut properly as described in this manual. The cutter blade is bended. Replace the cutter blade. The drive system does not work correctly. Ask your local authorized service center for repair. Abnormal vibration: stop the machine immediately! One end of the nylon cord has been broken. Bump the nylon cutting head against the ground while it is rotating to cause the cord to feed. The cutter blade is bended, cracked or worn. Replace the cutter blade. Cutter blade fastening nut is loose. Tighten the nut properly as described in this manual. Cutter blade is fastened improperly. The drive system does not work correctly. Ask your local authorized service center for repair. Cutting tool and motor cannot stop: Remove the battery immediately! Electric or electronic malfunction. Remove the battery cartridge and ask your local authorized service center for repair.20 FRANÇAIS (Instructions d’origine) Descriptif SPÉCIFICATIONS

FUNCTIES WAARSCHUWING:

Rainer Bergfeld Director general

(dB (A)) Incerteza K (dB (A))

Rainer Bergfeld Director executivo

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