Makita DUC252 User manual

EN Cordless Chain Saw Instruction manual
ZHCN 充电式链锯 使用说明书
ID Gergaji Rantai Nirkabel Petunjuk penggunaan
VI Maùy Cöa Xích Caàm Tay Hoaït Taøi lieäu höôùng daãn
Ñoäng Baèng Pin
TH  
DUC252
DUC302
014676

2
1014673
2014648
3014650 4012128
1
2
3
4
5
6
7
8
9
10
14
13
11
12
15 16
17 18
4
19

3
5014658 6015659
7014662 8014663
9014656 10 014664
11 014674 12 014653
20
21
22
12
13
2
2324
25
1
8
9

4
13 014660 14 014659
15 014661 16 014675
17 014712 18 014820
19 014655 20 014669
26
27
28
6
1
8
29 30
967
31
33
32

5
21 014668 22 008576
23 001742 24 014714
25 014667 26 006914
27 006915 28 014713
15
1
2
A
B
A
B

6
29 006917 30 006918
31 006923 32 009202
33 014665 34 008633
35 014456 36 014455
45
o
2
1
/ 2
45
o
34
35
36
36
37 37
38
11
40
40
39 39
41 39
30
30
4242

7
37 006927 38 006928
39 014344 40 010924
41 014671 42 010927
43 014715 44 001145
30
43
26
44
44 26
45

8
45 014672
47
46

9
ENGLISH (Original instructions)
Explanation of general view
SPECIFIC TIONS
• Due to our continuing program of research and development, the specifications herein are su ject to change without
notice.
• Specifications and attery cartridge may differ from country to country.
*1 Weight, with largest attery cartridge, without guide ar and chain, empty oil tank, according to EN ISO 11681-2.
*2 Weight, with attery cartridge, guide ar, and chain, filled oil tank, according to EPTA-Procedure 01/2003.
WARNING: Use appropriate com ination of the guide ar and saw chain. Otherwise personal injury may result.
Symbols END312-2
The following show the sym ols used for the equipment.
Be sure that you understand their meaning efore use.
..................... Read instruction manual.
..................... Wear eye protection.
..................... Wear ear protection.
..................... Wear a helmet, goggles and ear
protection.
..................... Do not expose to rain.
................ Hold the saw with oth hands while
working! One-handed use is
extremely hazardous!
............... Maximum permissi le cut length
1. Lever
2. Front hand guard
3. Top handle
4. Battery cartridge
5. Cara inar (rope attachment point)
6. Guide ar
7. Saw chain
8. Sprocket cover
9. Adjusting dial
10. Chain catcher
11. Guide ar cover
12. Lock-off utton
13. Switch trigger
14. Front handle
15. Spike umper
16. Adjusting screw for oil pump
(at the ottom)
17. Red indicator
18. Button
19. Star marking
20. Battery indicator
21. Indicator lamps
22. Check utton
23. Lock
24. Unlock
25. Adjusting screw
26. Sprocket
27. Adjusting pin
28. Hole
29. Loosen
30. Tighten
31. Oil tank cap
32. Oil inspection window
(for refilling the tank with oil)
33. Oil inspection window
34. Felling area
35. Felling direction
36. Danger zone
37. Escape route
38. Battery cover
39. Cutting length
40. Distance etween cutting edge and
depth gauge
41. Minimum 3 mm
42. Side plate angle
43. Slotted screwdriver
44. Locking ring
45. Limit mark
46. Brush holder cap
47. Screwdriver
Model DUC252 DUC302
Standard guide ar
Guide ar length 250 mm 300 mm
Cutting length 23 cm 24 cm 28 cm
Type Sprocket nose ar Carving ar Sprocket nose ar
Standard saw chain
Type 91PX 25AP 90PX
Pitch 9.5 mm (3/8”) 6.35 mm (1/4”) 9.5 mm (3/8”)
Gauge 1.3 mm (0.05”) 1.3 mm (0.05”) 1.1 mm (0.043”)
No. of drive links 40 60 46
Sprocket Num er of teeth 6 9 6
Pitch 9.5 mm (3/8”) 6.35 mm (1/4”) 9.5 mm (3/8”)
Overall length (without guide ar) 316 mm
Net weight *1 4.1 kg
*2 4.6 kg 4.7 kg
Chain speed per minute 8.3 m/s (500 m/min)
Chain oil tank volume 85 cm3
Rated voltage D.C.36V D.C.36V

10
.............. Direction of chain travel
.................. Saw chain oil adjustment
Intended use ENE090-1
The tool is intended for cutting ranches/pruning trees. It
is also suita le for tree service.
General Power Tool Safety
Warnings GEA006-2
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.
The term “power tool” in the warnings refers to your
mains-operated (corded) power tool or attery-operated
(cordless) power tool.
Work area safety
1. Keep work area clean and well lit. Cluttered or dark
areas invite accidents.
2. o 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.
3. Keep children and bystanders away while
operating a power tool. Distractions can cause you
to lose control.
Electrical safety
4. Power tool plugs must match the outlet. Never
modify the plug in any way. o 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 ody is earthed or grounded.
6. o not expose power tools to rain or wet
conditions. Water entering a power tool will increase
the risk of electric shock.
7. o 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. When operating a power tool outdoors, use an
extension cord suitable for outdoor use. Use of a
cord suita le for outdoor use reduces the risk of
electric shock.
9. If operating a power tool in a damp location is
unavoidable, use a ground fault circuit interrupter
(GFCI) protected supply. Use of an GFCI reduces
the risk of electric shock.
Personal safety
10. Stay alert, watch what you are doing and use
common sense when operating a power tool. o
not use a power tool while you are tired or under
the influence of drugs, alcohol or medication. A
moment of inattention while operating power tools
may result in serious personal injury.
11. 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.
12. 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.
13. 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.
14. o not overreach. Keep proper footing and
balance at all times. This ena les etter control of
the power tool in unexpected situations.
15. ress properly. o not wear loose clothing or
jewellery. Keep your hair, clothing, and gloves
away from moving parts. Loose clothes, jewellery or
long hair can e caught in moving parts.
16. 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
17. o not force the power tool. Use the correct power
tool for your application. The correct power tool will
do the jo etter and safer at the rate for which it was
designed.
18. o not use the power tool if the switch does not
turn it on and off. Any power tool that cannot e
controlled with the switch is dangerous and must e
repaired.
19. isconnect 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.
20. 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.
21. 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 y
poorly maintained power tools.

11
22. Keep cutting tools sharp and clean. Properly
maintained cutting tools with sharp cutting edges are
less likely to ind and are easier to control.
23. 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
24. Recharge only with the charger specified by the
manufacturer. A charger that is suita le for one type
of attery pack may create a risk of fire when used
with another attery pack.
25. Use power tools only with specifically designated
battery packs. Use of any other attery packs may
create a risk of injury and fire.
26. 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 attery terminals together may
cause urns or a fire.
27. Under abusive conditions, liquid may be ejected
from the battery; avoid contact. If contact
accidentally occurs, flush with water. If liquid
contacts eyes, additionally seek medical help.
Liquid ejected from the attery may cause irritation or
urns.
Service
28. 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.
29. Follow instruction for lubricating and changing
accessories.
30. Keep handles dry, clean and free from oil and
grease.
Cordless Chain saw safety
warnings: GEB071-7
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 ody with the saw chain.
2. 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 e done.
3. 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.
4. Wear safety glasses and hearing protection.
Further protective equipment for head, hands,
legs and feet is recommended. Adequate protective
clothing will reduce personal injury y flying de ris or
accidental contact with the saw chain.
5. o not operate a chain saw in a tree. Operation of a
chain saw while up in a tree may result in personal
injury.
6. Always keep proper footing and operate the chain
saw only when standing on fixed, secure and level
surface. Slippery or unsta le surfaces such as
ladders may cause a loss of alance or control of the
chain saw.
7. When cutting a limb that is under tension be alert
for spring back. When the tension in the wood fi res
is released the spring loaded lim may strike the
operator and/or throw the chain saw out of control.
8. Use extreme caution when cutting brush and
saplings. The slender material may catch the saw
chain and e whipped toward you or pull you off
alance.
9. 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.
10. Follow instructions for lubricating, chain
tensioning and changing accessories. Improperly
tensioned or lu ricated chain may either reak or
increase the chance for kick ack.
11. Keep handles dry, clean, and free from oil and
grease. Greasy, oily handles are slippery causing loss
of control.
12. Cut wood only. o 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:
Kick ack may occur when the nose or tip of the guide
ar touches an o ject, 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 ar up and ack
towards the operator.
Pinching the saw chain along the top of the guide ar
may push the guide ar rapidly ack towards the
operator.
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 uilt into your saw. As a chain saw user, you
should take several steps to keep your cutting jo s
free from accident or injury.
Kick ack is the result of tool misuse and/or incorrect
operating procedures or conditions and can e
avoided y taking proper precautions as given elow:
–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.
Kick ack forces can e controlled y the operator,
if proper precautions are taken. Do not let go of the
chain saw. (Fig. 1)

12
–o not overreach and do not cut above
shoulder height. This helps prevent unintended tip
contact and ena les etter control of the chain saw
in unexpected situations.
–Only use replacement bars and chains
specified by the manufacturer. Incorrect
replacement ars and chains may cause chain
reakage and/or kick ack.
–Follow the manufacturer’s sharpening and
maintenance instructions for the saw chain.
Decreasing the depth gauge height can lead to
increased kick ack.
14. 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 rake is working properly;
• The run-down rake is working properly;
• The ar and the sprocket cover are fitted correctly;
• The chain has een sharpened and tensioned in
accordance with the regulations;
15. o not start the chain saw with the chain cover
being installed on it. Starting the chain saw with the
chain cover eing installed on it may cause the chain
cover to thrown out forward resulting in personal injury
and damage to o jects around the operator.
S VE THESE INSTRUCTIONS.
WARNING:
O 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.
IMPORT NT S FETY
INSTRUCTIONS ENC007-8
FOR B TTERY C RTRIDGE
1. Before using battery cartridge, read all
instructions and cautionary markings on (1)
battery charger, (2) battery, and (3) product using
battery.
2. o 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. o not short the battery cartridge:
(1) o 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) o 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. o not store the tool and battery cartridge in
locations where the temperature may reach or
exceed 50°C (122°F).
7. o 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. o not use a damaged battery.
10. Follow your local regulations relating to disposal
of battery.
S VE 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
months if you do not use it for a long period of
time.
P RTS DESCRIPTION (Fig. 2)
FUNCTION L DESCRIPTION
CAUTION:
• Always e sure that the tool is switched off and the
attery cartridge is removed efore adjusting or
checking function on the tool.
Installing or remo ing battery cartridge
(Fig. 3)
CAUTION:
• Always switch off the tool efore installing or removing
of the attery cartridge.
•Hold the tool and the battery cartridge firmly when
installing or removing battery cartridge. Failure to
hold the tool and the attery cartridge firmly may cause
them to slip off your hands and result in damage to the
tool and attery cartridge and a personal injury.
To remove the attery cartridge, slide it from the tool while
sliding the utton on the front of the cartridge.
To install the attery cartridge, align the tongue on the
attery 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 utton, it is not locked completely.
CAUTION:
• Always install the attery cartridge fully until the red
indicator cannot e seen. If not, it may accidentally fall
out of the tool, causing injury to you or someone
around you.
• Do not install the attery cartridge forci ly. If the
cartridge does not slide in easily, it is not eing inserted
correctly.

13
NOTE:
• The tool does not work with only one attery cartridge.
Tool/battery protection system
The tool is equipped with a tool/ attery protection system.
This system automatically cuts off power to the motor to
extend tool and attery life.
The tool will automatically stop during operation if the tool
or attery 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 a normally high current, the tool automatically
stops without any indication. In this situation, turn the tool
off and stop the application that caused the tool to
ecome overloaded. Then turn the tool on to restart.
Overheat protection for battery/tool
When the attery/tool is overheated, the tool stops
automatically without any indication. The tool does not
start even if pulling the switch trigger. In this situation, let
the attery/tool cool efore turning the tool on again.
NOTE:
The attery overheat protection works only with a attery
cartridge with a star marking. (Fig. 4)
Overdischarge protection (Fig. 5)
When the remaining attery capacity gets low, the attery
indicator links on the applica le attery side. By further
use, the tool stops and the attery indicator lights up
a out 10 seconds. In this situation, charge the attery
cartridge.
Indicating the remaining battery capacity
Only for battery cartridges with the indicator (Fig. 6)
Press the check utton on the attery cartridge to indicate
the remaining attery capacity. The indicator lamps light
up for a few seconds.
NOTE:
• Depending on the conditions of use and the am ient
temperature, the indication may differ slightly from the
actual capacity.
Switch action (Fig. 7)
CAUTION:
• Before installing the attery cartridge into the tool,
always check to see that the switch trigger actuates
properly and returns to the “OFF” position when
released.
To prevent the switch trigger from eing accidentally
pulled, a lock-off utton is provided.
To start the tool, depress the lock-off utton and pull the
switch trigger. Release the switch trigger to stop.
Checking the chain brake (Fig. 8)
NOTE:
• If the chain saw fails to start, the chain rake must e
released. Pull the front hand guard ackwards firmly
until you feel it engage.
Hold the chain saw with oth hands when switching it on.
Hold the top handle with your right hand, the front handle
with your left. The ar and the chain must not e in
contact with any o ject.
First press the lock-off utton, then the switch trigger. The
saw chain starts immediately.
Press the front hand guard forwards using the ack of
your hand. The saw chain must come to an immediate
standstill.
CAUTION:
• Should the saw chain not stop immediately when this
test is performed, the saw may not e used under any
circumstances. Consult a MAKITA specialist repair
shop.
Checking the run-down brake
Switch on the chain saw.
Release the switch trigger completely. The saw chain
must come to a standstill within one second.
CAUTION:
• Should the saw chain not come to a stop within one
second when this test is performed, the saw must not
e used. Consult a MAKITA specialist repair shop.
Adjusting the chain lubrication (Fig. 9)
You can adjust the oil pump feed rate with the adjusting
screw. The amount of oil can e adjusted using the
universal wrench.
Carabiner (rope attachment point)
(Fig. 10)
Cara iner (Rope attachment point) is for use of tool
hanging. Before using cara iner, pull it out and tie it with a
rope.
SSEMBLY
CAUTION:
• Always e sure that the tool is switched off and the
attery cartridge is removed efore carrying out any
work on the tool.
Indicator lamps
Remaining
capacity
Lighted Off Blinking
75% to 100%
50% to 75%
25% to 50%
0% to 25%
Charge the
attery.
The attery may
have
malfunctioned.

14
Remo ing or installing saw chain
CAUTION:
• Always wear gloves when installing or removing the
saw chain.
• The saw chain and the guide ar are still hot just after
the operation. Let them cool down enough efore
carrying out any work on the tool.
To remove the saw chain, perform the following steps:
1. Press and fully open the lever until it stops. (Fig. 11)
2. Turn the adjusting dial to “-” direction to release the
saw chain tension. (Fig. 12)
3. Turn the lever counterclockwise to loosen the sprocket
cover until it comes off.
4. Remove the sprocket cover.
5. Remove the saw chain and guide ar from the chain
saw.
To install the saw chain, perform the following steps:
6. Make sure the direction of the chain. The arrow mark
on the chain shows the direction of the chain. (Fig. 13)
7. Fit in one end of the saw chain on the top of the guide
ar and the other end of it around the sprocket.
8. Rest the guide ar in place on the chain saw.
9. Turn the adjusting dial to “-” direction to slide the
adjusting pin in the direction of arrow. (Fig. 14)
10. Place the sprocket cover on the chain saw so that the
adjusting pin is positioned in a small hole in the guide
ar. (Fig. 15)
11. Turn the lever clockwise fully and a quarter turn ack
to keep looseness for adjusting chain tension.
12. Turn the adjusting dial, and adjust the chain tension.
13. Turn the lever clockwise to secure the sprocket cover.
(Fig. 16)
14. Press and return the lever to its original position.
Adjusting saw chain tension
The saw chain may ecome loose after many hours of
use. From time to time check the saw chain tension
efore use.
1. Press and fully open the lever until it clicks. Turn it
counterclockwise a little to loosen sprocket cover
lightly. (Fig. 11)
2. Lift up the guide ar tip slightly. (Fig. 17)
3. Turn the adjusting dial to adjust the saw chain tension.
Tighten the saw chain until the lower side of the saw
chain fits in the guide ar rail (see circle in the figure).
4. Keep holding the guide ar lightly and tighten the
sprocket cover after adjusting the chain tension. Make
sure that the saw chain does not loose at lower side.
5. Press and return the lever to its original position.
(Fig. 16)
Make sure the saw chain fits snugly against the lower side
of the ar.
CAUTION:
• Do not tighten the saw chain too much. Excessively
high tension of saw chain may cause reakage of saw
chain, wear of the guide ar and reakage of the
adjusting dial.
• A chain which is too loose can jump off the ar, 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.
Spike bumper (optional accessory)
(Fig. 18)
To install spike umper, perform the following steps:
1. Remove the sprocket cover, saw chain and guide ar
as descri ed in this instruction manual.
2. Place the spike umper, with the spikes facing
upwards, so that its holes line up with the holes
provided on the chain saw.
3. Tighten the spike umper with the two screws
provided.
OPER TION
CAUTION:
Do not cover vents, or it may cause overheating and
damage to the tool.
Lubrication (Fig. 19)
Saw chain is automatically lu ricated when the tool is in
operation.
Check the amount of remaining oil in the oil tank through
the oil inspection window.
To refill the tank, remove the cap from the oil tank
opening.
After refilling the tank, always screw the provided oil tank
cap on the chain saw.
CAUTION:
• When filling the chain saw with chain oil for the first
time, or refilling the tank after it has een completely
emptied, add oil up to the ottom edge of the filler neck.
The oil delivery may otherwise e impaired.
• As a saw chain oil, use oil exclusively for Makita chain
saws or oil availa le in market.
• Never use oil including dust and particles or volatile oil.
• When pruning trees, use otanical oil. Mineral oil may
harm trees.
• Never force the chain saw when pruning trees.
• Before cutting out, make sure that the provided oil tank
cap is screwed in place.
(Fig. 20)
Hold the chain saw away from the tree. Start it and wait
until lu rication on saw chain is adequate.
Bring the spike umper into contact with the ranch to e
cut efore switching on. Otherwise it may cause the guide
ar to wo le, resulting in injury to operator.
Saw the wood to e cut y just moving it down.
WORKING WITH THE CH IN S W
CAUTION:
• The first time user should, as a minimum practice, do
cutting logs on a saw-horse or cradle.
• When sawing precut tim er 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.
• Secure round pieces against rotation.
Pruning trees (Fig. 21)
CAUTION:
• Keep all parts of the ody away from the saw chain
when the motor is operating.

15
• Hold the chain saw firmly with oth hands when the
motor is running.
• Do not overreach. Keep proper footing and alance at
all times.
Bring the spike umper into contact with the ranch to e
cut efore switching on. Cutting without ringing the spike
umper into contact with the ranch may cause the guide
ar to wo le, resulting in injury to operator. (Fig. 22)
When cutting thick ranches, first make a shallow
undercut and then make the finish cut from the top.
(Fig. 23)
If you try to cut off thick ranches from the ottom, the
ranch may close in and pinch the saw chain in the cut.
If you try to cut off thick ranches from the top without a
shallow undercut, the ranch may splinter. (Fig. 24)
If you cannot cut the tim er right through with a single
stroke:
Apply light pressure to the handle and continue sawing
and draw the chain saw ack a little; then apply the spike
a little lower and finish the cut y raising the handle.
Bucking (Fig. 25)
For ucking cuts, rest the spike umper shown in the
figure on the wood to e cut.
With the saw chain running, saw into the wood, using the
top handle to raise the saw and the front one to guide it.
Use the spike umper as a pivot.
Continue the cut y applying slight pressure to the front
handle, easing the saw ack slightly. Move the spike
umper further down the tim er and raise the front handle
again.
When making several cuts, switch the chain saw off
etween cuts. (Fig. 26)
CAUTION:
• If the upper edge of the ar is used for cutting, the
chain saw may e deflected in your direction if the
chain ecomes trapped. For this reason, cut with the
lower edge, so that the saw will e deflected away from
your ody.
Cut wood under tension on the pressure side (A) first.
Then make the final cut on the tension side (B). This
prevents the ar from ecoming trapped. (Fig. 27)
Limbing
CAUTION:
• Lim ing may only e performed y trained persons. A
hazard is presented y the risk of kick- ack.
When lim ing, support the chain saw on the trunk if
possi le. Do not cut with the tip of the ar, as this
presents a risk of kick ack.
Pay particular attention to ranches under tension. Do not
cut unsupported ranches from elow.
Do not stand on the felled trunk when lim ing.
Burrowing and parallel-to-grain cuts
(Fig. 28)
CAUTION:
• Burrowing and parallel-to-grain cuts may only e
carried out y persons with special training. The
possi ility of kick ack presents a risk of injury.
Perform parallel-to-grain cuts at as shallow an angle as
possi le. Carry out the cut as carefully as possi le, as the
spike umper cannot e used.
Felling (Fig. 29)
CAUTION:
• Felling work may only e performed y trained
persons. The work is hazardous.
O serve local regulations if you wish to fell a tree.
– Before starting felling work, ensure that:
(1) Only persons involved in the felling operation are in
the vicinity;
(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 ca les;
(3) The ase of the trunk is free of foreign o jects,
roots and ranches;
(4) No persons or o jects 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 ranches;
• 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 first, then the horizontal
cut.
– 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 possi le. 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.
(Fig. 30)
– Cut any corrections to the scarf across its entire width.
– Make the ack cut a little higher than the ase cut of
the scarf. The ack cut must e exactly horizontal.
Leave approximately 1/10 of the trunk diameter
etween the ack cut and the scarf.
The wood fi ers in the uncut trunk portion act as a
hinge. Do not cut right through the fi ers under any
circumstances, as the tree will otherwise fall
unchecked. Insert wedges into the ack cut in time.
(Fig. 31)
– Only plastic or aluminum wedges may e used to keep
the ack cut open. The use of iron wedges is
prohi ited.
– 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” figure).
Pay attention to falling ranches.
– An escape path should e planned and cleared as
necessary efore cuts are started. The escape path
should extend ack and diagonally to the rear of the
expected line of fall as illustrated in figure. (Fig. 32)

16
Carrying tool (Fig. 33)
Always remove the attery cartridge from the tool and
overlap the guide ar with the guide ar cover efore
carrying the tool. Also cover the attery cartridge with the
attery cover.
M INTEN NCE
CAUTION:
• Always e sure that the tool is switched off and the
attery cartridge is removed efore attempting to
perform inspection or maintenance.
• Always wear gloves when performing any inspection or
maintenance.
• Never use gasoline, enzine, thinner, alcohol or the
like. Discoloration, deformation or cracks may result.
Sharpening the saw chain
CAUTION:
• Always remove the attery cartridge and wear safety
gloves when performing work on the saw chain.
Sharpen the saw chain when: (Fig. 34)
– Mealy sawdust is produced when damp wood is cut;
– The chain penetrates the wood with difficulty, even
when heavy pressure is applied;
– The cutting edge is o viously damaged;
– The saw pulls to the left or right in the wood. The
reason for this ehaviour is uneven sharpening of the
saw chain, or damage to one side only.
Sharpen the saw chain frequently, but remove only a
little material each time.
Two or three strokes with a file are usually sufficient for
routine resharpening. When the saw chain has een
resharpened several times, have it sharpened in a
MAKITA specialist repair shop.
Sharpening criteria: (Fig. 35)
– All cutter length must e equal. Cutters of differing
length prevent the chain from running smoothly, and
may cause the chain to reak.
– Do not sharpen the chain once a minimum cutter length
of 3 mm has een reached. A new chain must then e
fitted.
– The chip thickness is determined y the distance
etween the depth gauge (round nose) and the cutting
edge.
– The est cutting results are o tained with following
distance etween cutting edge and depth gauge.
Chain lade 90PX: 0.5 mm
Chain lade 91PX: 0.65 mm
Chain lade 25AP: 0.65 mm
WARNING:
• An excessive distance increases the risk of kick- ack.
– The sharpening angle of 30° must e the same on all
cutters. Differences in angle cause the chain to run
roughly and unevenly, accelerate wear, and lead to
chain reaks.
– The side plate angle of the cutter is determined y 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 lade 90PX: 75°
Chain lade 91PX: 80°
Chain lade 25AP: 85° (Fig. 36)
File and file guiding
– Use a special round file (optional accessory) for saw
chains to sharpen the chain. Normal round files are not
suita le.
– Diameter of the round file for each saw chain is as
follows:
Chain lade 90PX: 4.5 mm
Chain lade 91PX: 4.0 mm
Chain lade 25AP: 4.0 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 ecomes the standard for all other
cutters on the saw chain.
– Guide the file as shown in the figure. (Fig. 37)
– The file can e 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).
(Fig. 38)
– After sharpening the chain, check the height of the
depth gauge using the chain gauge tool (optional
accessory). (Fig. 39)
– Remove any projecting material, however small, with a
special flat file (optional accessory).
– Round off the front of the depth gauge again.
Cleaning guide bar (Fig. 40)
Chips and sawdust will uild up in the guide ar groove,
clogging it and impairing oil flow. Always clean out the
chips and sawdust when sharpening or replacing the saw
chain.
Cleaning the oil discharge hole
Small dust or particles may e uilt up in the oil discharge
hole during operation.
Small dust or particles uilt up in the oil discharge hole
may impair the oil discharge flow and cause an insufficient
lu rication on the whole saw chain.
When a poor chain oil delivery occurs at the top of guide
ar, clean the oil discharge hole as follows.
Remove the attery cartridge from the tool.
Remove the sprocket cover and saw chain from the tool.
(Refer to the section titled “Removing or installing saw
chain”.)
Remove the small dust or particles using a slotted
screwdriver with a slender shaft or the like. (Fig. 41)
Insert the attery cartridge into the tool.
Pull the switch trigger to flow uilt-up dust or particles off
the oil discharge hole y discharging chain oil.
Remove the attery cartridge from the tool.
Reinstall the sprocket cover and saw chain on the tool.
Replacing the sprocket (Fig. 42)
Before fitting a new saw chain, check the condition of the
sprocket.
CAUTION:
• A worn sprocket will damage a new saw chain. Have
the sprocket replaced in this case. The sprocket needs

17
to e installed so that it always faces as shown in the
figure.
Always fit a new locking ring when replacing the sprocket.
(Fig. 43)
Replacing carbon brushes (Fig. 44)
Remove and check the car on rushes regularly. Replace
when they wear down to the limit mark. Keep the car on
rushes clean and free to slip in the holders. Both car on
rushes should e replaced at the same time. Use only
identical car on rushes. (Fig. 45)
Use a screwdriver to remove the rush holder caps. Take
out the worn car on rushes, insert the new ones and
secure the rush holder caps.
Storing tool
Clean the tool efore storing. Remove any chips and
sawdust from the tool after removing the sprocket cover.
After cleaning the tool, run it under no load to lu ricate the
saw chain and guide ar.
Cover the guide ar with the guide ar cover.
Remove oil from the oil tank to empty it and place the
chain saw.
To maintain product SAFETY and RELIABILITY, repairs,
any other maintenance or adjustment should e
performed y Makita Authorized Service Centers, always
using Makita replacement parts.
Instructions for periodic maintenance
To ensure long life, prevent damage and ensure the full
functioning of the safety features the following
maintenance must e performed regularly.
Warranty claims can e recognized only if this work is
performed regularly and properly. Failure to perform the
prescri ed maintenance work can lead to accidents!
The user of the chain saw must not perform maintenance
work which is not descri ed in the instruction manual. All
such work must e carried out y authorized service
centre.
014804
Operating
time Before
operation Everyday Every week
Every
3 month Annually Before storage
Item
Chain saw
Inspection.
Cleaning.
Check at authorized service
center.
Saw chain Inspection.
Sharpening if necessary.
Guide ar Inspection.
Remove from the chain saw.
Chain rake
Check the function.
Have it inspected regularly at
authorized service center.
Chain lu rication Check the oil feed rate.
Switch trigger Inspection.
Lock-off utton Inspection.
Oil tank cap Check tightness.
Chain catcher Inspection.
Screws and nuts Inspection.

18
TROUBLE SHOOTING
Before asking for repairs, conduct your own inspection
first. If you find a pro lem that is not explained in the
manual, do not attempt to dismantle the tool. Instead, ask
Makita Authorized Service Centers, always using Makita
replacement parts for repairs.
014805
OPTION L CCESSORIES
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.
• Makita genuine attery and charger
• Saw chain
• Guide ar
• Guide ar cover
•File
• Tool ag
NOTE:
• Some items in the list may e included in the tool
package as standard accessories. They may differ from
country to country.
Malfunction status Cause Action
Chain saw does not start.
Two attery cartridges are not
installed. Install the charged attery cartridges.
Battery pro lem (under voltage). Recharge the attery cartridge. If recharging is
not effective, replace attery cartridge.
Chain does not run. Chain rake activated. Release chain rake.
Motor stops running after a little
use. Battery’s charge level is low. Recharge the attery cartridge. If recharging is not effective, replace attery cartridge.
No oil on the chain.
Oil tank is empty. Fill the oil tank.
Oil guide groove is dirty. Clean the groove.
Oil delivery is not adjusted
properly. Adjust amount of oil delivery.
It does not reach maximum RPM.
Battery cartridge is installed
improperly.
Install the attery cartridge as descri ed in this
manual.
Battery power is dropping. Recharge the attery cartridge. If recharging is
not effective, replace attery cartridge.
The drive system does not work
correctly.
Ask your local authorized service center for
repair.
Chain does not stop even the chain
rake is activated:
Stop the machine immediately!
Brake and worn down. Ask your local authorized service center for
repair.
A normal vi ration:
Stop the machine immediately!
Loose guide ar or saw chain. Adjust the guide ar and saw chain tension.
Tool malfunction. Ask your local authorized service center for
repair.

19
简体中文 （原厂指导手册）
总图说明
规格
•鉴于我司将持续实施研发计划，此处规格如有变更，恕不另行通知。
•本 品在各个国家的规格和电池套管可能有所不同。
*1 重量，带最大电池套管，无导向杆和链条，空油箱，符合 EN ISO 11681-2 标准。
*2 重量，带电池套管、导向杆和链条，油箱加满，符合 EPTA-Procedure 01/2003 标准。
警告：使用适合的导向杆和链锯条组合。否则可能导致人员受伤。
1. 杆
2. 前手护板
3. 顶部手柄
4. 电池套管
5. 登山扣 （绳索连接点）
6. 导向杆
7. 锯链
8. 链轮盖
9. 调节转盘
10. 链条锁销
11. 导向杆盖
12. 锁定关按钮
13. 开关扳机
14. 前手柄
15. 插木齿
16. 机油泵调节螺丝 （底部）
17. 红色指示灯
18. 按钮
19. 启动标记
20. 电池指示灯
21. 指示灯
22. 检查按钮
23. 锁定
24. 解锁
25. 调节螺丝
26. 链齿
27. 调节销
28. 孔
29. 拧松
30. 拧紧
31. 油箱盖
32. 机油检查窗
（用于将机油加注到油箱）
33. 机油检查窗
34. 砍伐区域
35. 砍伐方向
36. 危险区域
37. 撤离路线
38. 电池盖
39. 切割长度
40. 切削刃和深度计之间的距
离
41. 最小 3 mm
42. 侧板角度
43. 一字螺丝刀
44. 锁紧环
45. 限位标记
46. 碳刷固定器盖
47. 螺丝刀
型号 DUC252 DUC302
标准导向杆
导向杆长度 250 mm 300 mm
切割长度 23 cm 24 cm 28 cm
类型 链轮压尺 雕刻杆 链轮压尺
标准锯链
类型 91PX 25AP 90PX
节距 9.5 mm 6.35 mm 9.5 mm
仪表 1.3 mm 1.3 mm 1.1 mm
传动杆数量 40 60 46
链齿 齿数 6 9 6
节距 9.5 mm 6.35 mm 9.5 mm
总长 （不含导向杆） 316 mm
净重 *1 4.1 kg
*2 4.6 kg 4.7 kg
每分钟链条速度 8.3 m/s (500 m/min)
链条油箱容量 85 cm3
额定电压 D.C.36V D.C.36V

20
符号 END312-2
下列所示为用于设备的符号。请确保在使用
前理解各个符号的含义。
.............. 请阅读操作手册。
.............. 佩戴护目镜。
.............. 佩戴护耳装置。
.............. 戴好头盔，眼镜和耳朵保护装
置。
.............. 不要暴露在雨 。
.......... 工作时用双手握住锯子 ! 单手
使用非常危险！
...... 允许的最大切割长度
...... 链条行驶方向
........ 锯链机油调节
设计用途 ENE090-1
本工具设计用于切割树枝 / 修剪树木。也适
用于树木服务。
电动工具一般安全警告 GEA006-2
警告 请仔细阅读所有的安全警告和操作指
示。违反这些警告和指示可能导致触电、火
灾和/或严重的人身伤害事故。
请妥善保存所有的警告和操
作指示以备日后参考。
在该警告中的“电动工具”是指电网电源供
电 （接电源线）的电动工具或电池驱动（充
电式）电动工具。
工作区域安全
1. 保持工作区域 净，照明良好。杂乱或
黑暗的工作 所容易引发事故。
2. 不得在有爆炸性危险的环境 （如存在易
燃液体、气体和粉尘）中使用电动工具。
操作电动工具时会 生火花，而这可能
引燃粉尘或烟雾。
3. 操作电动工具时，请让儿童和旁观者远
离工作区域。注意力分散可能导致操作
失控。
电气安全
4. 电动工具的插头必须与插座相匹配。切
勿以任何方式对插头进行改装。转接插
头不得和接了地线的电动工具一起使用。
未经改动的插头和相匹配的插座有利于
减少电击危险。
5. 避免身体与接地的物体接触，如水管、
散热器、电炉和电冰箱等。如果您的身
体接地了，会增加电击的危险。
6. 不得将电动工具暴露在雨中或湿的环境
中。如果有水进入电动工具将增加电击
的危险。
7. 请勿不当使用电线。切勿用导线拖携工
具或拔下电动工具的插头。将电线保存
在远离高温、油垢、锐边或移动部件之
处。损坏或缠绕的电线会增加电击危险。
8. 当在户外操作电动工具时，只能使用合
适的户外专用延长电线。使用合适的户
外专用电线将减少电击危险。
9. 如果不能避免在潮湿的环境中使用电动
工具，请使用随供的漏电保护器
(GFCI)。使用 GFCI 可减少电击危险。
人身安全
10. 操作电动工具时请保持警惕，注意您的
操作并运用常识。疲惫、饮酒或服用毒
品、药物之后，切勿操作电动工具。使
用电动工具时只要稍微分心便可能导致
严重的人身伤害事故。
11. 请使用个人劳防用品。总是佩戴护目镜。
根据使用情况穿戴合适的防护装备，例
如防尘面罩、止滑工作鞋、安全帽或耳
罩，可降低人身伤害事故发生的几率。
12. 防止意外启动。在连接电源和 / 或电池
组、拿起或搬运工具之前，请确保开关
处于关闭位置。如果在提携电动工具时，
您的手指触碰了开关，或连接电源时，
开关仍然处于启动位置，都可能引发意
外事故。
13. 电动工具开机前，除去任何调节工具或
扳手。电动工具的旋转部件上如果还插
有扳手或调节工具可能会导致人身伤害。