Makita DUC303 Cordless Chain Saw User Manual

Makita DUC303 Cordless Chain Saw User Manual

SPECIFICATIONS

Model: DUC303 DUC353 DUC400
Overall length (without guide bar) 443 mm
Rated voltage D.C. 36 V
Standard battery cartridge BL1815N, BL1820, BL1820B, BL1830, BL1830B, BL1840,
BL1840B, BL1850, BL1850B, BL1860B
Net weight
(when using BL1815N)
with 90PX 4.6 kg 4.7 kg 4.8 kg
with 91PX 4.7 kg 4.8 kg 4.9 kg
Guide bar Guide bar length 300 mm 350 mm 400 mm
Cutting length 280 mm 330 mm 375 mm
Saw chain Type
(refer to the table below)
90PX
91PX
Number of drive links 46 52 56
Sprocket Number of teeth 6
Pitch 3/8″
Recommended guide bar length 300 – 400 mm Chain speed 0 – 20 m/s
(0 – 1,200 m/min)
Chain oil tank volume 200 cm3
Saw chain and guide bar
Type: 90PX 91PX
Pitch 3/8″ 3/8″
Gauge 1.1 mm 1.3 mm
Guide bar type Sprocket nose bar

• Due to our continuing program of research and development, the specifcations herein are subject to change without notice.
• Specifcations and battery cartridge may differ from country to country.
• Weight, with battery cartridge, according to EPTA-Procedure 01/2003

WARNING: Use appropriate combination of the guide bar and saw chain. Otherwise personal injury may result.

Vibration

The vibration total value (tri-axial vector sum) determined according to EN60745:

Model DUC303

Work mode: cutting wood
Vibration emission (ah,W) : 5.3 m/s2
Uncertainty (K) : 1.5 m/s2

Model DUC353

Work mode: cutting wood
Vibration emission (ah,W) : 5.3 m/s2
Uncertainty (K) : 1.5 m/s2

NOTE: 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.

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

WARNING: 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.

WARNING: 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).

SAFETY WARNINGS

General power tool safety warnings

Work area safety

• Keep work area clean and well lit. Cluttered or dark areas invite accidents.
• Do not operate power tools in explosive atmospheres, such as in the presence of fammable liquids, gases or dust. Power tools create sparks which may ignite the dust or fumes.
• Keep children and bystanders away while operating a power tool. Distractions can cause you to lose control.

Electrical Safety

• Power tool plugs must match the outlet. Never modify the plug in any way. Do not use any adapter plugs with earthed (grounded) power tools. Unmodifed plugs and matching outlets will reduce risk of electric shock.
• Avoid body contact with earthed or grounded surfaces, such as pipes, radiators, ranges and refrigerators. There is an increased risk of electric shock if your body is earthed or grounded.
• Do not expose power tools to rain or wet conditions. Water entering a power tool will increase
  the risk of electric shock.
• Do not abuse the cord. Never use the cord for carrying, pulling or unplugging the power tool. Keep cord away from heat, oil, sharp edges or moving parts. Damaged or entangled cords increase the risk of electric shock.
• When operating a power tool outdoors, use an extension cord suitable for outdoor use. Use of a cord suitable for outdoor use reduces the risk of electric shock.
• If operating a power tool in a damp location is unavoidable, use a residual current device (RCD) protected supply. Use of an RCD reduces the risk of electric shock.

Personal Safety

• Stay alert, watch what you are doing and use common sense when operating a power tool. Do not use a power tool while you are tired or under the infuence of drugs, alcohol or medication. A moment of inattention while operating power tools may result in serious personal injury.
• Use personal protective equipment. Always wear eye protection. Protective equipment such as a dust mask, non-skid safety shoes, hard hat or hearing protection used for appropriate conditions will reduce personal injuries.
• Prevent unintentional starting. Ensure the switch is in the off-position before connecting to power source and/or battery pack, picking up or carrying the tool. Carrying power tools with your fnger on the switch or energising power tools that have the switch on invites accidents.
• Remove any adjusting key or wrench before turning the power tool on. A wrench or a key left attached to a rotating part of the power tool may result in personal injury
• Do not overreach. Keep proper footing and balance at all times. This enables better control of the power tool in unexpected situations.
• Dress properly. Do not wear loose clothing or jewellery. Keep your hair, clothing, and gloves away from moving parts. Loose clothes, jewellery or long hair can be caught in moving parts.
• If devices are provided for the connection of dust extraction and collection facilities, ensure these are connected and properly used. Use of dust collection can reduce dust-related hazards.

Power tool use and care

• Do not force the power tool. Use the correct power tool for your application. The correct power tool will do the job better and safer at the rate for which it was designed.
• Do not use the power tool if the switch does not turn it on and off. Any power tool that cannot be controlled with the switch is dangerous andmust be repaired.
• Disconnect the plug from the power source and/or the battery pack from the power tool before making any adjustments, changing accessories, or storing power tools. Such preventive safety measures reduce the risk of starting the power tool accidentally.
• Store idle power tools out of the reach of children and do not allow persons unfamiliar with the power tool or these instructions to operate the power tool. Power tools are dangerous in the hands of untrained users.
• Maintain power tools. Check for misalignment or binding of moving parts, breakage of parts and any other condition that may affect the power tool’s operation. If damaged, have the power tool repaired before use. Many accidents are caused by poorly maintained power tools.
• Keep cutting tools sharp and clean. Properly maintained cutting tools with sharp cutting edges are less likely to bind and are easier to control.
• Use the power tool, accessories and tool bits etc. in accordance with these instructions, taking into account the working conditions and the work to be performed. Use of the power tool for operations different from those intended could result in a hazardous situation.

Battery tool use and care

• Recharge only with the charger specifed by the manufacturer. A charger that is suitable for one type of battery pack may create a risk of fre when used with another battery pack.
• Use power tools only with specifcally designated battery packs. Use of any other battery packs may create a risk of injury and fre.
• 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 fre.
• Under abusive conditions, liquid may be ejected from the battery; avoid contact. If contact accidentally occurs, fush with water. If liquid contacts eyes, additionally seek medical help. Liquid ejected from the battery may cause irritation or burns.

Service

• Have your power tool serviced by a qualifed repair person using only identical replacement parts. This will ensure that the safety of the power tool is maintained.
• Follow instruction for lubricating and changing accessories.
• Keep handles dry, clean and free from oil and grease.

Cordless Chain saw safety warnings

• Keep all parts of the body away from the saw chain when the chain saw is operating. Before you start the chain saw, make sure the saw chain is not contacting anything. A moment of inattention while operating chain saws may cause entanglement of your clothing or body with the saw chain.
• Always hold the chain saw with your right  hand on the rear handle and your left hand on the front handle. Holding the chain saw with a reversed hand confguration increases the risk of personal injury and should never be done.
• Hold the power tool by insulated gripping surfaces only, because the saw chain may contact hidden wiring. Saw chains contacting a “live” wire may make exposed metal parts of the power tool “live” and could give the operator an electric shock.
• Wear safety glasses and hearing protection. Further protective equipment for head, hands, legs and feet is recommended. Adequate protective clothing will reduce personal injury by fying debris or accidental contact with the saw chain.
• Do not operate a chain saw in a tree. Operation of a chain saw while up in a tree may result in personal injury.
• Always keep proper footing and operate the chain saw only when standing on fxed, secure and level surface. Slippery or unstable surfaces such as ladders may cause a loss of balance or control of the chain saw.
• When cutting a limb that is under tension be alert for spring back. When the tension in the wood fbres is released the spring loaded limb may strike the operator and/or throw the chain saw out of control.
• Use extreme caution when cutting brush and saplings. The slender material may catch the saw chain and be whipped toward you or pull you off balance.
• Carry the chain saw by the front handle with the chain saw switched off and away from your body. When transporting or storing the chain saw always ft the guide bar cover. Proper handling of the chain saw will reduce the likelihood of accidental contact with the moving saw chain.
• Follow instructions for lubricating, chain tensioning and changing accessories. Improperly tensioned or lubricated chain may either break or increase the chance for kickback.
• Keep handles dry, clean, and free from oil and grease. Greasy, oily handles are slippery causing loss of control.

• Do not overreach and do not cut above shoulder height. This helps prevent unintended tip contact and enables better control of the chain saw in unexpected situations.
• Only use replacement bars and chains specifed by the manufacturer. Incorrect replacement bars and chains may cause chain breakage and/or kickback.
• Follow the manufacturer’s sharpening and maintenance instructions for the saw chain. Decreasing the depth gauge height can lead to increased kickback.
• Before starting work, check that the chain saw is in proper working order and that its condition complies with the safety regulations.
  Check in particular that:
• The chain brake is working properly;
• The run-down brake is working properly;
• The bar and the sprocket cover are ftted correctly;
• The chain has been sharpened and tensioned in accordance with the regulations.

Important safety instructions for battery cartridge

• Before using battery cartridge, read all instructions and cautionary markings on (1) battery charger, (2) battery, and (3) product using battery.
• Do not disassemble battery cartridge.
• If operating time has become excessively shorter, stop operating immediately. It may result in a risk of overheating, possible burns and even an explosion.
• 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.
• Do not short the battery cartridge:
• Do not touch the terminals with any conductive material.
• Avoid storing battery cartridge in a container with other metal objects such as nails, coins, etc.
• Do not expose battery cartridge to water or rain. A battery short can cause a large current fow, overheating, possible burns and even a breakdown.
• Do not store the tool and battery cartridge in locations where the temperature may reach or exceed 50 °C (122 °F).
• Do not incinerate the battery cartridge even if it is severely damaged or is completely worn out. The battery cartridge can explode in a fre.
• Be careful not to drop or strike battery.
• Do not use a damaged battery.
• The contained lithium-ion batteries are subject to the Dangerous Goods Legislation requirements. For commercial transports e.g. by third parties, forwarding agents, special requirement on packaging and labeling must be observed. For preparation of the item being shipped, consulting an expert for hazardous material is required. Please also observe possibly more detailed national regulations. Tape or mask off open contacts and pack up the battery in such a manner that it cannot move around in the packaging.
• Follow your local regulations relating to disposal of battery.

Tips for maintaining maximum battery life

• Charge the battery cartridge before completely discharged. Always stop tool operation and charge the battery cartridge when you notice less tool power.
• dge. Overcharging shortens the battery service life.
• 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.
• Charge the battery cartridge if you do not use it for a long period (more than six months).

PARTS DESCRIPTION

• Battery cartridge 2 Front hand guard 3 Guide bar
• Saw chain 5 Lever 6 Adjusting dial
• Check button 8 Capacity indicator 9 Main power lamp
• Main power switch 11 Lock-off lever 12 Rear handle
• Switch trigger 14 Front handle 15 Oil tank cap
• Chain catcher 17 Adjusting screw (for oil pump) 18 Guide bar cover

FUNCTIONAL DESCRIPTION

CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before adjusting or checking function on the tool.

Installing or removing battery cartridge

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

CAUTION: Hold the tool and the battery cartridge frmly when installing or removing battery cartridge. Failure to hold the tool and the battery cartridge frmly 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.

CAUTION: 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.

NOTE: Pay attention to the position of your fngers when installing the battery. The button will be depressed unintentionally.

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 is placed under one of the following conditions.

Overload protection

When the tool is operated in a manner that causes it to draw an abnormally high current, the tool automatically stops and the main power lamp will 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

When the tool is overheated, the tool automatically stops and the capacity indicator lamp will blink as illustrated. In this situation, let the tool cool down before turning the tool on again.

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

Indicating the remaining battery capacity

• The remaining battery capacity is shown while you are pressing the check button. The capacity indicators correspond to each battery

Indicating the remaining battery capacity

• Only for battery cartridges with the indicator

• Press the check button on the battery cartridge to indicate the remaining battery capacity. The indicator lamps light up for few seconds.

NOTE: Depending on the conditions of use and the ambient temperature, the indication may differ slightly from the actual capacity

Main power switch

WARNING: Always turn off the main power switch when not in use.

To stand by the chain saw, press the main power switch until the main power lamp lights up. To turn off, press the main power switch again.

NOTE: The main power lamp brinks if the switch trigger is pulled under unoperatable conditions. The lamp blinks if you

• turn on the main power switch while holding down the lock-off lever and the switch trigger;
• pull the switch trigger while the chain brake is applied;
• release the chain brake while holding down the lock-off lever and pulling the switch trigger.

NOTE: This chain saw employs the auto power-off function. To avoid unintentional start up, the main power switch will automatically shut down when the switch trigger is not pulled for a certain period after the main power switch is turned on. Switch action

WARNING: For your safety, this tool is  equipped with lock-off lever which prevents the tool from unintended starting. NEVER use the tool if it runs when you simply pull the switch trigger  without pressing the lock-off lever. Return the tool to our authorized service center for proper repairs BEFORE further usage.

WARNING: NEVER tape down or defeat purpose and function of lock-off lever.

CAUTION: Before installing the battery cartridge into the tool, always check to see that the switch trigger actuates properly and returns to the “OFF” position when released.

NOTICE: Do not pull the switch trigger hard without pressing the lock-off lever. This can cause switch breakage.

To prevent the switch trigger from being accidentally pulled, a lock-off lever is provided. To start the tool, depress the lock-off lever and pull the switch trigger. Release the switch trigger to stop.

Checking the chain brake

CAUTION: Hold the chain saw with both hands when switching it on. Hold the rear handle with your right hand, the front handle with your left. The bar and the chain must not be in contact with any object.

CAUTION: Should the saw chain not stop immediately when this test is performed, the saw may not be used under any circumstances.

Consult our authorized service center.

• Press the lock-off lever, then pull the switch trigger. The saw chain starts immediately.
• Push the front hand guard forwards with the back of your hand. Make sure that the chain saw comes to an immediate standstill.

Checking the run-down brake

CAUTION: If the saw chain does not stop within one second in this test, stop using the chain saw and consult our authorized service center.

Run the chain saw then release the switch trigger completely. The saw chain must come to a standstill within one second.

Adjusting the chain lubrication

You can adjust the oil pump feed rate with the adjusting screw. The amount of oil can be adjusted using the universal wrench.

ASSEMBLY

CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before carrying out any work on the tool.

CAUTION: Do not touch the saw chain with bare hands. Always wear gloves when handling the saw chain.

Removing or installing saw chain

CAUTION: The saw chain and the guide bar are still hot just after the operation. Let them cool down enough before carrying out any work on the tool. To remove the saw chain, perform the following steps:

• Pull the lever up while pressing its edge.

• Turn the lever counterclockwise until the sprocket cover comes off.

Remove the sprocket cover then remove the saw chain and guide bar from the chain saw body. To install the saw chain, perform the following steps:

• Make sure the direction of the chain. The arrow mark on the chain shows the direction of the chain.
• Fit in one end of the saw chain on the top of the guide bar and the other end around the sprocket.

• Rest the guide bar in place on the chain saw.
• Turn the adjusting dial to “-” direction to slide the adjusting pin in the direction of arrow

• Place the sprocket cover on the chain saw so that the adjusting pin is positioned in a small hole on the guide bar.

• Turn the lever clockwise fully and a quarter turn back to keep looseness for adjusting the chain tension.
• Turn the adjusting dial to adjust the chain tension.
• Turn the lever clockwise until the sprocket cover is secured then return it to the original position.

Adjusting saw chain tension

CAUTION: Carry out the procedure of installing or removing saw chain in a clean place free from sawdust and the like.

CAUTION: Do not tighten the saw chain too much. Excessively high tension of saw chain may cause breakage of saw chain, wear of the guide bar and breakage of the adjusting dial.

CAUTION: A chain which is too loose can jump off the bar and it may cause an injury accident.

The saw chain may become loose after many hours of use. From time to time check the saw chain tension before use.

• Press and fully open the lever until it clicks. Turn it counterclockwise a little to loosen sprocket cover lightly

• Lift up the guide bar tip slightly and adjust the chain tension. Turn the adjusting dial to the “-” direction to loosen, turn to the “+” direction to tighten. Tighten the saw chain until the lower side of the saw chain fts in the guide bar rail as illustrated.

• Keep holding the guide bar lightly and tighten the sprocket cover. Make sure that the saw chain does not loose at the lower side.
• Return the lever to the original position.

OPERATION

Lubrication

Saw chain is automatically lubricated when the tool is in operation. Check the amount of remaining oil in the oil tank periodically. To refll the tank, lay the chain saw on its side and remove the oil tank cap. The proper amount of oil is 200 ml. After reflling the tank, make sure that the oil tank cap is tightened securely

After reflling, hold the chain saw away from the tree. Start it and wait until lubrication on saw chain is adequate.

WORKING WITH THE CHAIN SAW

CAUTION: The frst time user should, as a minimum practice, do cutting logs on a saw-horse or cradle.

CAUTION: When sawing precut timber, use a safe support (saw horse or cradle). Do not steady the workpiece with your foot, and do not allow anyone else to hold or steady it.

CAUTION: Secure round pieces against rotation.

CAUTION: Keep all parts of the body away from the saw chain when the motor is operating.

CAUTION: Hold the chain saw frmly with both hands when the motor is running.

CAUTION: Do not overreach. Keep proper footing and balance at all times.

NOTICE: Never toss or drop the tool.

NOTICE: Do not cover the vents of the tool. Bring the bottom edge of the chain saw body into contact with the branch to be cut before switching on. Otherwise it may cause the guide bar to wobble, resulting in injury to operator. Saw the wood to be cut by just moving it down by using the weight of the chain saw.

• If you cannot cut the timber right through with a single stroke:
• Apply light pressure to the handle and continue sawing and draw the chain saw back a little; then apply the spike bumper a little lower and fnish the cut by raising the handle.

Bucking
1. Rest the bottom edge of the chain saw body on
the wood to be cut.

• With the saw chain running, saw into the wood while using the rear handle to raise the saw and the front one to guide it. Use the spike bumper as a pivot.
• Continue the cut by applying slight pressure to the front handle, easing the saw back slightly. Move the spike bumper further down the timber and raise the front handle again.

NOTICE: When making several cuts, switch the chain saw off between cuts.

CAUTION: If the upper edge of the bar is used for cutting, the chain saw may be defected in your direction if the chain becomes trapped. For this reason, cut with the lower edge, so that th

Limbing

CAUTION: Limbing may only be performed by trained persons. A hazard is presented by the risk of kickback.

When limbing, support the chain saw on the trunk if possible. Do not cut with the tip of the bar, as this presents a risk of kickback. Pay particular attention to branches under tension. Do not cut unsupported branches from below. Do not stand on the felled trunk when limbing.

Burrowing and parallel-to-grain cuts

CAUTION: Burrowing and parallel-to-grain cuts may only be carried out by persons with special training. The possibility of kickback presents a risk of injury. Perform parallel-to-grain cuts at as shallow an angle as possible. Take an extra caution when carrying out the cut as the spike bumper cannot be used.

Before starting felling work, ensure that:

• Only persons involved in the felling operation are in the vicinity;
• Any person involved has an unhindered path of retreat through a range of approximately 45° either side of the felling axis. Consider the additional risk of tripping over electrical cables;
• The base of the trunk is free of foreign objects, roots and ranches;
• No persons or objects are present over a distance of 2 1/2 tree lengths in the direction in which the tree will fall.
• Consider the following with respect to each tree:
• Direction of lean;
• Loose or dry branches;
• Height of the tree;
• Natural overhang;
• Whether or not the tree is rotten.
• Consider the wind speed and direction. Do not carry out felling work if the wind is gusting strongly.
• Trimming of root swellings: Begin with the largest swellings. Make the vertical cut frst, then the horizontal cut.
• Stand to the side of the falling tree. Keep an area clear to the rear of the falling tree up to an angle of 45° either side of the tree axis (refer to the “felling area” fgure). Pay attention to falling branches.
• An escape path should be planned and cleared as necessary before cuts are started. The escape path should extend back and diagonally to the rear of the expected line of fall as illustrated in fgure.

MAINTENANCE

CAUTION: Always be sure that the tool is switched off and the battery cartridge is removed before attempting to perform inspection or maintenance.

CAUTION: Always wear gloves when performing any inspection or maintenance.

NOTICE: Never use gasoline, benzine, thinner, alcohol or the like. Discoloration, deformation or cracks may result.

Sharpening the saw chain

Sharpen the saw chain when:

• Mealy sawdust is produced when damp wood is cut;
• The chain penetrates the wood with diffculty, even when heavy pressure is applied;
• The cutting edge is obviously damaged;
• The saw pulls to the left or right in the wood. (caused by uneven sharpening of the saw chain or damage to one side only) Sharpen the saw chain frequently but a little each time. Two or three strokes with a fle are usually suffcient for routine resharpening. When the saw chain has been resharpened several times, have it sharpened in our authorized service center. Sharpening criteria:

WARNING: An excessive distance between the cutting edge and depth gauge increases the risk of kickback.

File and fle guiding

• Use a special round fle (optional accessory) for saw chains to sharpen the chain. Normal round fles are not suitable.
• Diameter of the round fle for each saw chain is as follows:
• Chain blade 90PX : 4.5 mm (3/16″)
• Chain blade 91PX : 4.0 mm (5/32″)
• The fle should only engage the cutter on the forward stroke. Lift the fle off the cutter on the return stroke.

Cleaning the sprocket cover

Chips and saw dust will accumulate inside of the sprocket cover. Remove the sprocket cover and saw chain from the tool then clean the chips and saw dust.

Cleaning the oil discharge hole

Small dust or particles may be built up in the oil discharge hole during operation. These dust or particles may impair the oil to fow and cause an insuffcient lubrication on the whole saw chain. When a poor chain oil delivery occurs at the top of guide bar, clean the oil discharge hole as follows.

• Remove the sprocket cover and saw chain from the tool.
• Remove the small dust or particles using a slotted screwdriver with a slender shaft or the like.

Instructions for periodic maintenance

To ensure long life, prevent damage and ensure the full functioning of the safety features, the following maintenance must be performed regularly. Warranty claims can be recognized only if this work is performed regularly and properly. Failure to perform the prescribed maintenance work can lead to accidents! The user of the chain saw must not perform maintenance work which is not described in the instruction manual. All such work must be carried out by our authorized service center

Check item / Operating time Before operation
Everyday Every week Every 3 month
Annually Before
storage
Chain saw Inspection. – – – – –
Cleaning. – – – – – Check at authorized service center. – – – –
Saw chain Inspection. – – – – – Sharpening if necessary. – – – – –
Guide bar Inspection. – – – – Remove from the chain saw. – – – – –
Chain brake Check the function. – – – – –
Have it inspected regularly at authorized service center. – – – – –
Chain lubrication Check the oil feed rate. – – – – –
Switch trigger Inspection. – – – – –
Lock-off lever Inspection. – – – – – Oil tank cap Check tightness.
– – – – –
Chain catcher Inspection. – – – – –
Screws and nuts
Inspection. – – – – –
To maintain product SAFETY and RELIABILITY, repairs, any other maintenance or adjustment should be performed by Makita Authorized or Factory Service Centers, always using Makita replacement parts.

TROUBLESHOOTING

Before asking for repairs, conduct your own inspection frst. If you fnd a problem that is not explained in the manual, do not attempt to disma

Malfunction status Cause Action
The chain saw does not start. Two battery cartridges are not installed. Install two charged battery cartridges.
Battery problem (low voltage). Recharge the battery cartridges. If recharging is not effective, replace the battery cartridge.
Main power switch is off. The chain saw is automatically turned off if it is un-operated for a certain period. Turn on the main power switch again.
The saw chain does not run. Chain brake activated. Release chain brake.
The motor stops running after a little use. Battery’s charge level is low. Recharge the battery cartridges. If recharging is not effective, replace the battery cartridge.
No oil on the chain. Oil tank is empty. Fill the oil tank.
Oil guide groove is dirty. Clean the groove.
Poor oil delivery. Adjust the amount of oil delivery with the adjusting screw.
The chain saw does not reach maximum
RPM.
Battery cartridge is installed improperly. Install the battery cartridges as described in this manual.
Battery power is dropping. Recharge the battery cartridges. If recharging is not effective, replace the battery cartridge.
The drive system does not work correctly. Ask the authorized service center in your region for repair.
The main power lamp is blinking. Switch trigger is pulled under an unoperatable condition.
Pull the switch trigger after the main power switch is turned on and the chain brake is released.
Chain does not stop even the chain brake is activated: Stop the machine immediately!
The brake band is worn down. Ask the authorized service center in your region for repair.
Abnormal vibration:
Stop the machine immediately!
Loose guide bar or saw chain. Adjust the guide bar and saw chain tension.
Tool malfunction. Ask the authorized service center in your region for repair.

REFRENCE LINK

https://www.makita.fi/cordless-chain-saw-duc303.html