Electronic Function - Makita DUC256C Instruction Manual

Checking the chain brake
CAUTION:
Hold the chain saw with both
hands when switching it on. Hold the top 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.
1. Press the lock-off lever, then pull the switch trig-
ger. The saw chain starts immediately.
2. Push the front hand guard forwards with the back
of your hand. Make sure that the chain saw comes to an
immediate standstill.
► Fig.8: 1. Front hand guard 2. Unlocked position
3. Locked position
Checking the run-down brake
CAUTION:
If the saw chain does not stop
within two seconds in this test, stop using the
chain saw and consult our authorized service
center.
Run the chain saw then release the switch trigger com-
pletely. The saw chain must come to a standstill within
two seconds.
Adjusting the chain lubrication
You can adjust the oil pump feed rate with the adjusting
screw using the universal wrench. The amount of oil
can be adjusted in 3 steps. Open the cap to adjust the
adjusting screw.
► Fig.9: 1. Cap 2. Adjusting screw
Carabiner (rope attachment point)
You can hang the tool by attaching the rope to the cara-
biner. Pull up the carabiner, and then tie it with the rope.
► Fig.10: 1. Carabiner
Spike bumper
The tool is equipped with the spike bumper as stan-
dard. For replacement of the spike bumper, ask Makita
Authorized Service Centers.
When you perform the cutting operation, engage the
spike bumper with the trunk and use it as a lever.

Electronic function

The tool is equipped with the electronic functions for
easy operation.
• Constant speed control
The speed control function provides the constant
rotation speed regardless of load conditions.
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.
CAUTION:
Carry out the procedure of install-
ing or removing saw chain in a clean place free
from sawdust and the like.
To remove the saw chain, perform the following steps:
1. Release the chain brake by pulling the front hand
guard.
2. Loosen the chain adjusting screw, then the retain-
ing nut.
► Fig.11: 1. Chain adjusting screw 2. Retaining nut
3. 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:
1. Check the direction of the saw chain. Match the
direction of the saw chain with that of the mark on the
chain saw body.
2. Fit one end of the saw chain on the top of the
guide bar.
3.
Fit the other end of the saw chain around the
sprocket, then attach the guide bar to the chain saw
body, aligning the hole on the guide bar with the pin on
the chain saw body.
► Fig.12: 1. Sprocket 2. Hole
4. Insert the protrusion and the pin on the sprocket
cover to the chain saw body, and then close the cover
so that the bolt and pin on the chain saw body meet
their counterparts on the cover.
► Fig.13: 1. Protrusion 2. Sprocket cover 3. Bolt
4. Pin
5. Tighten the retaining nut to secure the sprocket
cover, then loosen it a bit for tension adjustment.
► Fig.14: 1. Retaining nut
Adjusting saw chain tension
CAUTION:
Do not tighten the saw chain too
much. Excessively high tension of saw chain may
cause breakage of saw chain and wear of the guide
bar.
CAUTION:
A chain which is too loose can
jump off the bar and it may cause an injury
accident.
14 ENGLISH