Makita Chainsaw UC3050A User Manual

INSTRUCTION MANUAL  
Electric Chain Saw  
UC3050A  
UC3550A  
UC4050A  
UC4550A  
UC3051A  
UC3551A  
UC4051A  
UC4551A  
014371  
DOUBLE INSULATION  
IMPORTANT: Read Before Using.  
1
 
GEA005-3  
Personal safety  
11. 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  
General Power Tool Safety  
Warnings  
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.  
the influence of drugs, alcohol or medication.  
A
moment of inattention while operating power tools  
may result in serious personal injury.  
12. Use personal protective equipment. Always  
wear eye protection. Protective equipment such  
as dust mask, non-skid safety shoes, hard hat, or  
hearing protection used for appropriate conditions  
will reduce personal injuries.  
13. 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 finger on the switch or energising power  
tools that have the switch on invites accidents.  
14. 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.  
15. Do not overreach. Keep proper footing and  
balance at all times. This enables better control  
of the power tool in unexpected situations.  
16. 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.  
17. 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  
18. 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.  
19. 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  
and must be repaired.  
20. 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.  
Save all warnings and  
instructions for future reference.  
The term "power tool" in the warnings refers to your  
mains-operated (corded) power tool or battery-operated  
(cordless) power tool.  
Work area safety  
1.  
Keep work area clean and well lit. Cluttered or  
dark areas invite accidents.  
2.  
Do not operate power tools in explosive  
atmospheres, such as in the presence of  
flammable 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.  
3.  
Electrical safety  
4.  
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. Unmodified plugs and matching outlets will  
reduce risk of electric shock.  
5.  
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  
6.  
7.  
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.  
8.  
9.  
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.  
21. 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.  
22. Maintain power tools. Check for misalignment or  
binding of moving parts, breakage of parts and  
any other condition that may affect the power  
10. Use of power supply via a RCD with a rated  
residual current of 30mA or less is always  
recommended.  
3
 
tool’s operation. If damaged, have the power tool  
repaired before use. Many accidents are caused by  
poorly maintained power tools.  
7.  
When cutting a limb that is under tension be  
alert for spring back. When the tension in the  
wood fibres 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 fit the guide bar cover.  
Proper handling of the chain saw will reduce the  
likelihood of accidental contact with the moving  
saw chain.  
23. Keep cutting tools sharp and clean. Properly  
maintained cutting tools with sharp cutting edges  
are less likely to bind and are easier to control.  
24. 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.  
Service  
8.  
9.  
25. Have your power tool serviced by a qualified  
repair  
person  
using  
only  
identical  
replacement parts. This will ensure that the  
safety of the power tool is maintained.  
10. Follow instructions for lubricating, chain  
tensioning and changing accessories.  
26. Follow instruction for lubricating and  
changing accessories.  
27. Keep handles dry, clean and free from oil and  
Improperly tensioned or lubricated chain may  
either break or increase the chance for kickback.  
11. Keep handles dry, clean, and free from oil and  
grease. Greasy, oily handles are slippery causing  
loss of control.  
12. Cut wood only. Do not use chain saw for  
purposes not intended. For example: do not  
use chain saw for cutting plastic, masonry or  
non-wood building materials. Use of the chain  
saw for operations different than intended could  
result in a hazardous situation.  
13. Causes and operator prevention of kickback:  
Kickback may occur when the nose or tip of the  
guide bar touches an object, or when the wood  
closes in and pinches the saw chain in the cut.  
Tip contact in some cases may cause a sudden  
reverse reaction, kicking the guide bar up and  
back towards the operator.  
grease.  
GEB037-8  
Chain saw safety warnings  
1.  
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.  
2.  
3.  
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 configuration 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 or its own cord. Saw  
Pinching the saw chain along the top of the guide  
bar may push the guide bar rapidly back towards  
the operator.  
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  
flying 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 fixed,  
secure and level surface. Slippery or unstable  
surfaces such as ladders may cause a loss of  
balance or control of the chain saw.  
Either of these reactions may cause you to lose  
control of the saw which could result in serious  
personal injury. Do not rely exclusively upon the  
safety devices built into your saw. As a chain saw  
user, you should take several steps to keep your  
cutting jobs free from accident or injury.  
Kickback is the result of tool misuse and/or incorrect  
operating procedures or conditions and can be  
avoided by taking proper precautions as given below:  
4.  
5.  
6.  
Maintain a firm grip, with thumbs and fingers  
encircling the chain saw handles, with both  
hands on the saw and position your body  
and arm to allow you to resist kickback  
forces. Kickback forces can be controlled by the  
operator, if proper precautions are taken. Do not  
let go of the chain saw.  
4
 
4. The chain saw is not intended for commercial use.  
5. Do not overload the chain saw.  
Personal protective equipment  
1.  
Clothing must be close-fitting, but must not  
obstruct mobility.  
2.  
Wear the following protective clothing during  
work:  
A
tested safety helmet, if  
a
hazard is  
presented by falling branches or similar;  
A face mask or goggles;  
Suitable ear protection (ear muffs, custom or  
mouldable ear plugs). Octave brand analysis  
upon request.  
Firm leather safety gloves;  
Long trousers manufactured from strong  
fabric;  
Protective dungarees of cut-resistant fabric;  
Safety shoes or boots with non-slip soles,  
steel toes, and cut-resistant fabric lining;  
A breathing mask, when carrying out work  
which produces dust (e.g. sawing dry wood).  
014316  
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  
specified 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.  
Protection against electric shock  
The chain saw must not be used in wet  
weather or damp environments, as the  
electric motor is not waterproof.  
ADDITIONAL SAFETY RULES  
1.  
Read the instruction manual in order to familiarize  
yourself with operation of the chain saw.  
1.  
Only plug the saw into sockets in tested electrical  
circuits. Check that the system voltage matches  
that on the rating plate. Ensure that a 16 A line  
fuse is fitted. Saws used in the open air must be  
connected to a residual current-operated circuit-  
breaker with an operating current no higher than  
30 mA.  
2.  
Before using the chain saw for the first time,  
arrange to have instruction in its operation. If this  
is not possible, at least practice cutting round  
timber on a trestle before beginning work.  
The chain saw must not be used by children or  
young persons under 18 years of age. Young  
persons over 16 years of age may be exempted  
from this restriction if they are undergoing training  
under the supervision of an expert.  
3.  
Should the connecting cable be  
damaged, withdraw the mains plug  
immediately.  
Safe working practices  
4.  
5.  
Working with the chain saw requires a high level  
of concentration. Do not work with the saw if you  
are not feeling fit and well. Carry out all work  
calmly and carefully.  
Never work under the influence of alcohol, drugs  
or medication.  
1.  
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 fitted  
correctly;  
Proper use  
1.  
The chain saw is intended solely for cutting wood.  
Do not use it for example to cut plastic or porous  
concrete.  
Only use the chain saw for operations described  
in this instruction manual. Do not, for example,  
use it to trim hedges or for similar purposes.  
The chain has been sharpened and tensioned  
in accordance with the regulations;  
The mains cable and mains plug are  
undamaged;  
2.  
Refer to the "CHECKS " section.  
3. The chain saw must not be used for forestry work,  
i.e. for felling and limbing standing timber. The  
chain saw cable does not provide the operator  
with the mobility and safety required for such  
work.  
2.  
Always ensure in particular that the extension  
cable used is of adequate cross-section (see  
"SPECIFICATIONS"). When using a cable reel,  
wind the cable completely off the reel. When  
5
 
using the saw in the open air, ensure that the  
cable employed is intended for open-air use and  
is rated accordingly.  
16. Guide the chain saw such that no part of your  
body is within the extended path of the saw chain  
(see figure).  
3.  
4.  
5.  
Keep the cord away from the cutting area and to  
position cord so that it will not be caught on  
branches, and the like, during cutting.  
Do not operate the chain saw in the vicinity of  
flammable dust or gases, as the motor generates  
sparks and presents a risk of explosion.  
Work only on firm ground and with a good footing.  
Pay particular attention to obstacles (e.g. the  
cable) in the working area. Take particular care  
where moisture, ice, snow, freshly cut wood or  
bark may make surfaces slippery. Do not stand  
on ladders or trees when using the saw.  
006909  
17. When moving around between sawing operations,  
apply the chain brake in order to prevent the  
chain from being operated unintentionally. Hold  
the chain saw by the front handle when carrying it,  
and do not keep your finger on the switch.  
18. Withdraw the mains plug when taking breaks or  
leaving the chain saw unattended. Leave the  
chain saw where it cannot present a hazard.  
6.  
Take particular care when working on sloping  
ground; rolling trunks and branches pose  
potential hazard.  
a
7.  
8.  
Never cut above shoulder height.  
Hold the chain saw with both hands when  
switching it on and using it. Hold the rear  
handle with your right hand and the front handle  
with your left. Hold the handles firmly with your  
thumbs. The bar and the chain must not be in  
contact with any objects when the saw is  
switched on.  
Kickback  
1.  
Hazardous kickback may arise during work with  
the chain saw. Kickback arises when the tip of the  
bar (in particular the upper quarter) comes into  
contact with wood or another solid object. This  
causes the chainsaw to be deflected in the  
direction of the operator.  
014316  
9.  
Clean the area to be cut of foreign objects such  
as sand, stones, nails, wire, etc. Foreign objects  
damage the bar and chain, and can lead to  
dangerous kickback.  
006919  
2.  
In order to avoid kickback, observe the following:  
Never begin the cut with the tip of the bar.  
Never use the tip of the bar for cutting. Take  
particular care when resuming cuts which  
have already been started.  
10. Take particular care when cutting in the vicinity of  
wire fences. Do nut cut into the fence, as the saw  
may kick back.  
Start the cut with the chain running.  
Always sharpen the chain correctly. In  
particular, set the depth gauge to the correct  
height.  
Never saw through several branches at a time.  
When limbing, take care to prevent the bar  
from coming into contact with other branches.  
When bucking, keep clear of adjacent trunks.  
Always observe the bar tip.  
11. Do not cut into the ground.  
12. Cut pieces of wood singly, not in bunches or  
stacks.  
13. Avoid using the saw to cut thin branches and  
roots, as these can become entangled in the  
chain saw. Loss of balance presents a hazard.  
14. Use a secure support (trestle) when cutting sawn  
timber.  
15. Do not use the chain saw to prise off or brush  
away pieces of wood and other objects.  
Use a trestle.  
6
 
4.  
5.  
6.  
7.  
Have any damage to the plastic housing repaired  
properly and immediately.  
Safety features  
1.  
Always check that the safety features are in  
Do not use the saw if the switch trigger is not  
working properly. Have it properly repaired.  
Under no circumstances should any modifications  
be made to the chain saw. Your safety is at risk.  
Do not carry out maintenance or repair work other  
than that described in this instruction manual. Any  
other work must be carried out by authorized  
service centers.  
Only use genuine replacement parts and  
accessories intended for your model of saw. The  
use of other parts increases the risk of accident.  
We accept no responsibility for accidents or  
damage should non-approved bars, saw chains  
or other replacement parts or accessories be  
used.  
working order before starting work. Do not use  
the chain saw if the safety features are not  
working properly.  
Chain brake:  
The chain saw is fitted with a chain brake which  
brings the saw chain to a standstill within a fraction  
of a second. It is activated when the hand guard is  
pushed forwards. The saw chain then stops within  
0.15 s, and the power supply to the motor is  
interrupted.  
8.  
9.  
1. Chain brake  
applied  
2. Chain brake  
released  
2
1
First aid  
Do not work alone. Always work within  
shouting distance of a second person.  
1.  
2.  
Always keep a first-aid box to hand. Replace any  
items taken from it immediately.  
Should you request assistance in the event of an  
accident, state the following:  
014317  
Run-down brake:  
The chain saw is equipped with an run down brake  
which brings the saw chain to an immediate stop  
when the ON/OFF switch is released. This  
prevents the saw chain from running on when  
switched off, and thus presenting a hazard.  
The front and rear hand guards protect the user  
against injury from pieces of wood which may be  
thrown backwards, or a broken saw chain.  
The trigger lockout prevents the chain saw from  
being switched on accidentally.  
Where did the accident happen?  
What happened?  
How many persons are injured?  
What injuries do they have?  
Who is reporting the accident?  
NOTE:  
Individuals 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 colour or of the skin.  
The chain catcher protects the user against injury  
should the chain jump or break.  
Transport and storage  
When the chain saw is not in use or is  
being transported, withdraw the mains  
plug and fit the guide bar cover  
supplied with the saw. Never carry or  
transport the saw with the saw chain  
running.  
If any of these symptoms occur, see a physician!  
SAVE THESE INSTRUCTIONS.  
WARNING:  
1.  
2.  
Carry the chain saw by the front handle only, with  
the bar pointing backwards.  
Keep the chain saw in a secure, dry and locked  
room out of the reach of children. Do not store the  
chain saw outdoors.  
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.  
Maintenance  
1.  
2.  
3.  
Withdraw the plug from the socket before carrying  
out any adjustments or maintenance.  
Check the power cable regularly for damage to  
the insulation.  
Clean the chain saw regularly.  
7
 
DESIGNATION OF PARTS  
(Nut model: the sprocket cover is tightened by nuts.)  
For Model UC3050A, UC3550A, UC4050A, UC4550A  
4
3
5
6
2
1
8
9
10  
014372  
(Lever model: the sprocket cover is tightened by lever.)  
For Model UC3051A, UC3551A, UC4051A, UC4551A  
4
3
5
6
2
1
7
8
9
10  
014373  
8
 
(For all models)  
14  
11  
13  
12  
16  
18  
17  
15  
014514  
1
2
3
Rear handle  
Switch trigger  
Front handle  
7
8
9
Lever  
13 Oil filler cap  
14 Lock-off button  
15 Chain catcher  
Adjusting screw/dial  
Sprocket cover  
4
5
Front hand guard  
Guide bar  
10 Rear hand guard  
11 Spike bumper  
16 Guide bar cover  
17 Cord hook  
Adjusting screw for oil pump  
(at the bottom)  
6
Saw chain  
12 Oil level sight  
18  
014375  
(For lever models)  
ASSEMBLY  
1. Lever  
2. Sprocket cover  
2
1
CAUTION:  
Always be sure that the tool is switched off and  
unplugged before carrying out any work on the  
tool.  
Removing or installing sprocket cover  
To remove the sprocket cover, perform the following  
steps:  
(For nut models)  
014393  
Press and fully open the lever until it stops.  
Turn the lever counterclockwise.  
To install the sprocket cover, perform the above steps in  
reverse.  
Removing or installing saw chain  
CAUTION:  
Always wear gloves when installing or removing  
the saw chain.  
014453  
Loosen the nut.  
9
 
To remove the saw chain, perform the following steps:  
1. Guide bar  
2. Hole  
1.  
2.  
Loosen the sprocket cover.  
1
(For nut models) Turn the chain adjusting screw  
counterclockwise to release the saw chain  
tension.  
(For lever models) Turn the adjusting dial to "-"  
direction to loosen the saw chain tension.  
1. Adjusting screw  
2
014448  
1
9.  
Holding the guide bar, and turn the chain  
adjusting screw / dial to adjust the saw chain  
tension.  
10. Place the sprocket cover so that the hooks fit  
alongside the holes and the pin fits its counterpart  
on the sprocket cover.  
014515  
1. Hook  
2. Hole  
3. Pin  
1
1. Adjusting dial  
2
1
3
014380  
11. Tighten the sprocket cover.  
014516  
3.  
4.  
Remove the sprocket cover.  
Remove the saw chain and guide bar from the  
chain saw.  
To install the saw chain, perform the following steps:  
5.  
Make sure the direction of the chain. The arrow  
mark on the chain shows the direction of the  
chain.  
1. Sprocket  
014454  
1. Lever  
2. Sprocket cover  
2
1
1
014457  
6.  
Fit in one end of the saw chain on the top of the  
guide bar and the other end of it around the  
sprocket.  
014394  
7.  
8.  
Place the guide bar on the chain saw.  
Align the tension slide with the hole of the guide  
bar.  
10  
 
Adjusting saw chain tension  
Engaging extension cord  
CAUTION:  
The saw chain may become loose after many hours of  
use. From time to time check the saw chain tension  
before use.  
Make sure that the extension cord is unplugged to  
the mains outlet.  
1.  
2.  
Loosen the sprocket cover lightly.  
Keep lifting up the guide bar tip slightly to keep  
the guide bar horizontal.  
1. Cord hook  
2. Tool's cord  
1
3.  
Turn the adjusting screw / dial to adjust saw chain  
tension.  
3. Extension cord  
4. Plug and socket  
(the shape may  
differ from country  
to country)  
3
1. Loosen  
2
2. Tighten  
2-4 mm  
3. Chain adjusting  
screw  
4
4. Guide bar  
5. Saw chain  
014359  
3
5
1
When engaging the extension cord, secure it to the  
chain saw's cord with the cord hook.  
2
Attach the cord hook about 100 - 200 mm from the extension  
cord connector. This helps prevent unintentional disconnection.  
4
014451  
1. Loosen  
2. Tighten  
OPERATION  
2-4 mm  
3. Adjusting dial  
4. Guide bar  
5. Saw chain  
CAUTION:  
Hold the tool firmly with right hand on the rear  
handle and left hand on the front handle when  
performing the tool.  
3
5
Switch action  
1
2
4
1. Lock-off button  
2. Switch trigger  
014449  
1
4.  
Grasp the saw chain in the middle of the guide  
bar and lift up. The gap between the guide bar  
and the tie strap of the saw chain should be  
approx. 2 - 4 mm.  
2
5.  
After adjusting the chain tension, tighten the  
sprocket cover.  
CAUTION:  
014376  
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:  
Always be sure that the tool is switched off and  
unplugged before checking function on the switch trigger.  
Before plugging in the tool, always check to see  
that the switch trigger actuates properly and  
returns to the "OFF" position when released.  
A chain which is too loose can jump off the bar,  
and therefore presents an accident risk.  
Carry out the procedure of installing or removing  
saw chain in a clean place free from sawdust and  
the like.  
To prevent the switch trigger from being accidentally  
pulled, a lock-off button is provided.  
To start the tool, depress the lock-off button and pull the  
switch trigger. Release the switch trigger to stop.  
Lubrication  
CAUTION:  
Always be sure that the tool is switched off and  
unplugged before lubricating the saw chain.  
11  
 
CHECKS  
Before starting work, carry out the following checks:  
Checking the chain tension  
Reclaimend  
oil  
WARNING:  
Always withdraw the mains plug before checking  
the chain tension, and wear safety gloves.  
(For nut models)  
006921  
1. Loosen  
Lubricate the saw chain and bar using biologically  
degradable saw chain oil with an adhesion agent. The  
adhesion agent in the saw chain oil prevents the oil from  
being thrown off the saw excessively quickly. Mineral oils  
must not be used, as they are harmful to the environment.  
2. Tighten  
3. Chain adjusting  
screw  
4. Guide bar  
5. Saw chain  
2-4 mm  
3
5
1
2
CAUTION:  
Prevent the oil from coming into contact with the  
skin and eyes. Contact with the eyes causes  
irritation. In the event of eye contact, flush the  
affected eye immediately with clear water, then  
consult a doctor at once.  
4
014451  
(For lever models)  
1. Loosen  
2. Tighten  
2-4 mm  
Never use waste oil. Waste oil contains carcinogenic  
substances. The contaminants in waste oil cause  
accelerated wear of the oil pump, the bar and the  
chain. Waste oil is harmful to the environment.  
When filling the chain saw with chain oil for the first  
time, or refilling the tank after it has been completely  
emptied, add oil up to the bottom edge of the filler  
neck. The oil delivery may otherwise be impaired.  
3. Adjusting dial  
4. Guide bar  
5. Saw chain  
3
5
1
2
4
014449  
The saw chain is correctly tensioned when it is in contact  
with the underside of the bar and can be raised  
approximately 2 - 4 mm from the bar by light finger pressure.  
Check the chain tension frequently, as new chains are  
subject to elongation.  
1. Oil filler cap  
1
2. Strap  
2
Excessively high tension of saw chain may cause  
breakage of saw chain, wear of the guide bar and  
breakage of the adjusting dial.  
A chain which is too loose can jump off the bar, and  
therefore presents an accident risk.  
014386  
To fill the oil, perform the following steps:  
If the chain is too loose: Refer to the section titled "Adjusting  
saw chain tension" and adjust the saw chain tension again.  
Checking the switch action  
1.  
Clean the area around the oil filler cap thoroughly  
to prevent any dirt from entering the oil tank.  
Unscrew the oil filler cap and add oil up to the  
lower edge of the filler neck.  
2.  
CAUTION:  
3.  
4.  
Screw the oil filler cap firmly back in place.  
Wipe away any spilt chain oil carefully.  
Before plugging in the tool, always check to see that the  
switch trigger actuates properly and returns to the  
"OFF" position when released.  
NOTE:  
When the chain saw is used for the first time, it  
To prevent the switch trigger from being accidentally  
pulled, a lock-off button is provided.  
may take up to two minutes for the saw chain oil to  
begin its lubricating effect upon the saw  
mechanism. Run the saw without load until it does  
so (see "CHECKS ").  
To start the tool, depress the lock-off button and pull the  
switch trigger. Release the switch trigger to stop.  
Do not pull the switch trigger hard without depressing  
the lock-off button. This may cause switch breakage.  
12  
 
Checking the chain brake  
NOTE:  
Checking the chain oiler  
Before starting work, check the oil level in the tank, and  
the oil delivery.  
The oil level can be seen in the oil level sight shown in  
the figure.  
If the chain saw fails to start, check whether the  
chain brake is released. To release the chain  
brake, pull the hand guard backwards firmly until  
you feel it engage.  
1. Oil level sight  
1. Front hand guard  
2. Lock  
3
2
1
3. Unlock  
1
014517  
Check the oil delivery as follows:  
Start the chain saw.  
014387  
2
With the saw running, hold the saw chain approximately  
15 cm above a tree trunk or the ground. If lubrication is  
adequate, the oil spray will produce a light oil trace.  
Observe the wind direction, and do not expose yourself  
to the oil spray unnecessarily.  
3
1. Front hand guard  
2. Unlock  
3. Lock  
1
CAUTION:  
If an oil trace is not formed, do not use the saw. The  
lifespan of the chain will otherwise be reduced.  
Check the oil level. Clean the oil feed groove and the  
oil feed hole in the bar (refer to "MAINTENANCE ").  
014439  
Check the chain brake as follows:  
Adjusting the chain lubrication  
1.  
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. Make  
sure that the bar and the chain do not contact  
with any object.  
2.  
3.  
First press the lock-off button, then the switch  
trigger. The saw chain starts immediately.  
Press the front hand guard forwards using the  
back of your hand. Make sure that the saw chain  
comes to an immediate standstill.  
014392  
CAUTION:  
You can adjust the oil pump feed rate with the adjusting  
screw.  
If the saw chain does not stop immediately, do not  
use the saw under any circumstances. Consult  
Makita authorized service centers.  
WORKING WITH THE CHAIN SAW  
Checking the run-down brake  
CAUTION:  
Switch on the chain saw.  
Release the switch trigger completely. Make sure the  
saw chain comes to a standstill within a second.  
Always use a front handle and rear handle and  
firmly hold the tool by both front handle and rear  
handle during operations.  
Always secure the timber to be cut, otherwise the  
cut fragments may cause personal injury.  
CAUTION:  
If the saw chain does not stop immediately, do not  
use the saw under any circumstances. Consult  
Makita authorized service centers.  
13  
 
Bucking  
Limbing  
CAUTION:  
1. Spike bumper  
Limbing may only be performed by trained  
persons. A hazard is presented by the risk of kick-  
back.  
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.  
1
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  
014389  
For bucking cuts, rest the spike bumper shown in the  
figure on the wood to be cut.  
With the saw chain running, saw into the wood, 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.  
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.  
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 deflected in your direction if the  
chain becomes trapped. For this reason, cut with  
the lower edge, so that the saw will be deflected  
away from your body.  
014390  
Perform parallel-to-grain cuts at as shallow an angle as  
possible. Carry out the cut as carefully as possible, as  
the spike bumper cannot be used.  
Felling  
CAUTION:  
Felling work may only be performed by trained  
persons. The work is hazardous.  
Observe local regulations if you wish to fell a tree.  
1. Felling area  
006914  
45o  
Cut wood under tension on the pressure side (A )first.  
Then make the final cut on the tension side (B ). This  
prevents the bar from becoming trapped.  
2 1  
/2  
45o  
1
A
006917  
B
B
Before starting felling work, ensure that:  
(1) Only persons involved in the felling operation  
are in the vicinity;  
A
(2) 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;  
006915  
14  
 
(3) The base of the trunk is free of foreign  
objects, roots and ranches;  
(4) No persons or objects are present over a  
distance of 2 1/2 tree lengths in the direction  
in which the tree will fall.  
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  
branches.  
"
figure). Pay attention to falling  
Consider the following with respect to each tree:  
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 figure.  
Direction of lean;  
Loose or dry branches;  
Height of the tree;  
Natural overhang;  
Whether or not the tree is rotten.  
1
1. Felling direction  
2. Danger zone  
3. Escape route  
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 first, then the  
horizontal cut.  
2
3
3
2
009202  
MAINTENANCE  
CAUTION:  
Always be sure that the tool is switched off and  
unplugged before attempting to perform inspection  
or maintenance.  
006918  
Cut a scarf: The scarf determines the direction in  
which the tree will fall, and guides it. It is made on  
the side towards which the tree is to fall. Cut the  
scarf as close to the ground as possible. First  
make the horizontal cut to a depth of 1/5 -1/3 of  
the trunk diameter. Do not make the scarf too  
large. Then make the diagonal cut.  
Always wear gloves when performing any  
inspection or maintenance.  
Never use gasoline, benzine, thinner, alcohol or  
the like. Discoloration, deformation or cracks may  
result.  
Carry out the maintenance work described below at  
regular intervals. Warranty claims will be accepted only  
if these operations have been performed regularly and  
properly.  
Cut any corrections to the scarf across its entire width.  
Only maintenance work described in this instruction  
manual may be performed by the user. Any other work  
must be carried out by MAKITA authorized service  
centers.  
Cleaning the chain saw  
Clean the saw regularly with a clean rag. The handles,  
in particular, must be kept free of oil.  
006923  
Checking the plastic housing  
Make the back cut a little higher than the base cut  
of the scarf. The back cut must be exactly  
horizontal. Leave approximately 1/10 of the trunk  
diameter between the back cut and the scarf.  
The wood fibers in the uncut trunk portion act as a  
hinge. Do not cut right through the fibers under  
any circumstances, as the tree will otherwise fall  
unchecked. Insert wedges into the back cut in time.  
Only plastic or aluminum wedges may be used to  
keep the back cut open. The use of iron wedges is  
prohibited.  
Carry out regular visual inspections of all parts of the  
housing. If any parts are damaged, have them repaired  
immediately and properly in MAKITA authorized service  
centers.  
15  
 
WARNING:  
Sharpening the saw chain  
CAUTION:  
An excessive distance increases the risk of kick-back.  
The sharpening angle of 30 ° must be the same on  
all cutters. Differences in angle cause the chain to  
run roughly and unevenly, accelerate wear, and  
lead to chain breaks.  
Always withdraw the mains plug and wear safety  
gloves when performing work on the saw chain.  
The side plate angle of the cutter is determined by  
the depth of penetration of the round file. If the  
specified file is used properly, the correct side  
plate angle is produced automatically.  
Side plate angle for each saw chain are as follows:  
Chain blade 91PX: 80 °  
1. Side plate angle  
30  
006924  
Sharpen the saw chain when:  
30  
Mealy sawdust is produced when damp wood is  
cut;  
1
1
The chain penetrates the wood with difficulty, even  
when heavy pressure is applied;  
The cutting edge is obviously damaged;  
The saw pulls to the left or right in the wood. The  
reason for this behavior is uneven sharpening of  
the saw chain, or damage to one side only.  
014455  
Sharpen the saw chain frequently, but remove only  
a little material each time.  
File and file guiding  
Use a special round file (optional accessory) for  
saw chains to sharpen the chain. Normal round  
files are not suitable.  
Diameter of the round file for each saw chain is as  
follows:  
Two or three strokes with a file are usually sufficient for  
routine resharpening. When the saw chain has been  
resharpened several times, have it sharpened in  
MAKITA authorized service center.  
Sharpening criteria:  
Chain blade 91PX: 4.0 mm  
All cutter length must be equal. Cutters of differing  
length prevent the chain from running smoothly,  
and may cause the chain to break.  
Do not sharpen the chain once a minimum cutter  
length of 3 mm has been reached. A new chain  
must then be fitted.  
The chip thickness is determined by the distance  
between the depth gauge (round nose) and the  
cutting edge.  
The best cutting results are obtained with following  
distance between cutting edge and depth gauge.  
Chain blade 91PX: 0.65 mm  
The file should only engage the cutter on the  
forward stroke. Lift the file off the cutter on the  
return stroke.  
Sharpen the shortest cutter first. Then the length  
of this shortest cutter becomes the standard for all  
other cutters on the saw chain.  
1. Cutting length  
2
2
1
1
2. Distance between  
cutting edge and  
depth gauge  
006927  
3. Minimum 3 mm  
Guide the file as shown in the figure.  
The file can be guided more easily if a file holder  
(optional accessory) is employed. The file holder  
has markings for the correct sharpening angle of  
30 ° (align the markings parallel to the saw chain)  
and limits the depth of penetration (to 4/5 of the  
file diameter).  
3
1
014456  
16  
 
Cleaning the oil guide  
1. Oil guide groove  
2. Oil feed hole  
1
30  
2
006928  
After sharpening the chain, check the height of the  
depth gauge using the chain gauge tool (optional  
accessory).  
014391  
Clean the oil guide groove and the oil feed hole in  
the bar at regular intervals.  
New saw chains  
Use two or three saw chains alternately, so that the saw  
chain, sprocket and running surfaces of the bar wear  
evenly.  
Turn the bar over when changing the chain so that the  
bar groove wears evenly.  
CAUTION:  
014344  
Only use chains and bars which are approved for  
this model of saw (refer to "SPECIFICATIONS").  
Remove any projecting material, however small,  
with a special flat file (optional accessory).  
Round off the front of the depth gauge again.  
1. Sprocket  
1
Cleaning the guide bar and lubricating the  
return sprocket  
CAUTION:  
Always wear safety gloves for this task. Burrs  
present a risk of injury.  
014513  
Before fitting a new saw chain, check the condition of  
the sprocket.  
CAUTION:  
A worn sprocket damages a new saw chain. Have  
the sprocket replaced in this case.  
Always fit  
sprocket.  
a
new locking ring when replacing the  
006930  
Check the running surfaces of the bar regularly for  
damage. Clean using a suitable tool, and remove burrs  
if necessary.  
If the chain saw receives frequent use, lubricate the  
return sprocket bearing at least once a week. Before  
adding new fresh grease, carefully clean the 2 mm hole  
on the tip of the guide bar, then force a small quantity of  
multi-purpose grease (optional accessory) into the hole.  
Maintaining the chain and run-down brakes  
The braking systems are very important safety features.  
Like any other component of the chain saw, they are  
subject to a certain degree of wear. They must be  
inspected regularly by MAKITA authorized service  
centers. This measure is for your own safety.  
17  
 
To maintain product SAFETY and RELIABILITY, repairs,  
any other maintenance or adjustment should be  
performed by Makita Authorized Service Centers,  
always using Makita replacement parts.  
Replacing carbon brushes  
1. Limit mark  
1
001145  
Remove and check the carbon brushes regularly.  
Replace when they wear down to the limit mark. Keep  
the carbon brushes clean and free to slip in the holders.  
Both carbon brushes should be replaced at the same  
time. Use only identical carbon brushes.  
1. Brush holder cap  
2. Screwdriver  
1
2
014395  
Use a screwdriver to remove the brush holder caps.  
Take out the worn carbon brushes, insert the new ones  
and secure the brush holder caps.  
After replacing brushes, plug in the tool and break in  
brushes by running tool with no load for about 10  
minutes.  
Storing tool  
Biologically degradable saw chain oil can only be kept  
for a limited period. Beyond two years after manufacture,  
biological oils begin to acquire an adhesive quality, and  
cause damage to the oil pump and components in the  
lubricating system.  
Before taking the chain saw out of service for a  
longer period, empty the oil tank and fill it with a  
small quantity of engine oil (SAE 30).  
Run the chain saw briefly to flush all residue of the  
biological oil out of the tank, lubricating system  
and saw mechanism.  
NOTE:  
When the chain saw is taken out of service, small  
quantities of chain oil leaks from it for some time  
afterwards. This is normal, and is not a sign of a  
fault.  
Store the chain saw on a suitable surface.  
Before returning the chain saw to service, fill up with  
fresh BIOTOP saw chain oil.  
18  
 
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 Makita Authorized Service Centers.  
Possible cause  
Remedy  
Malfunction status  
Connect to the power supply.  
Check the power supply.  
No power supply.  
Stop using the tool immediately, and ask your local  
authorized service center.  
Cable defective.  
The chain saw does not  
start.  
Stop using the tool immediately, and ask your local  
authorized service center.  
Tool malfunction.  
Chain does not run.  
Chain brake is engaged.  
Release chain brake.  
Insufficient performance. Carbon brush worn down.  
Oil tank is empty.  
Ask your local authorized service center for repair.  
Fill the oil tank.  
Oil guide groove is dirty.  
Clean the groove.  
No oil on the chain.  
Oil pump adjusting screw  
incorrectly adjusted.  
Adjust the oil pump feed rate.  
Chain does not stop  
even the chain brake is  
engaged.  
Stop using the tool immediately, and ask your local  
authorized service center.  
Brake band worn down.  
Loose guide bar or saw  
chain.  
Adjust the guide bar and saw chain tension.  
The tool vibrates  
abnormally.  
Stop using the tool immediately, and ask your local  
authorized service center.  
Tool malfunction.  
014314  
NOTE:  
OPTIONAL ACCESSORIES  
Some items in the list may be included in the tool  
package as standard accessories. They may differ  
from country to country.  
CAUTION:  
These  
accessories  
or  
attachments  
are  
recommended for use with your Makita 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 Makita Service Center.  
Saw chain  
Guide bar cover  
Guide bar  
Saw chain oil  
19  
 
Makita Corporation  
885287-3  
 

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