Adjusting Saw Chain Tension - Makita DUA300 Instruction Manual

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. Loosen the chain adjusting screw, then the retain-
ing nut.
► Fig.6: 1. Retaining nut 2. Chain adjusting screw
2.
Remove the sprocket cover, and then remove the
saw chain and guide bar from the tool 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
tool body.
2. Fit one end of the saw chain on the top of the
guide bar. Fit the other end of the saw chain around the
sprocket. Make sure that the saw chain is properly fitted
on the sprocket and properly fitted in the groove of the
guide bar.
3. Attach the guide bar to the tool body, aligning the
hole on the guide bar with the pin on the tool body.
► Fig.7: 1. Hole 2. Sprocket
4.
Insert the protrusion on the sprocket cover to the
tool body, and then close the cover so that the bolt and
pin on the tool body meet their counterparts on the
cover.
► Fig.8: 1. Sprocket cover 2. Protrusion 3. Bolt 4. Pin
5. Tighten the retaining nut to secure the sprocket
cover, then loosen it a bit for tension adjustment.
► Fig.9: 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.
The saw chain may become loose after many hours
of use. From time to time check the saw chain tension
before use.
1.
Loosen the retaining nut a bit to loosen the
sprocket cover lightly.
► Fig.10: 1. Retaining nut
2. Lift up the guide bar tip slightly and adjust the
chain tension. Turn the chain adjusting screw counter-
clockwise to tighten, turn it clockwise to loosen.
Tighten the saw chain until the lower side of the saw
chain fits in the guide bar rail as illustrated.
► Fig.11: 1. Guide bar 2. Saw chain 3. Chain adjust-
ing screw
3. Keep holding the guide bar lightly and attach the
sprocket cover.
Make sure that the saw chain does not loose at the
lower side.
4.
Tighten the retaining nut to secure the sprocket
cover.
► Fig.12: 1. Retaining nut
Installing or removing the angled
attachment
Optional accessory
CAUTION:
Before installing or removing the
angled attachment, be sure to attach the guide
bar cover to the tool.
You can change the angle of the tool head by attaching
the angled attachment to the tool.
1. Attach the guide bar cover to the tool.
2. Loosen 2 bolts with the hex wrench, and then
remove the pipe and sleeves from the head of the tool.
► Fig.13: 1. Sleeve 2. Bolt
3.
Remove the caps from the angled attachment.
► Fig.14: 1. Cap
4. Align the hole on the sleeve with that on the pipe,
and then attach 2 sleeves to the pipe. Align the hole on
the sleeve with that on the attachment, and then insert
the pipe into the attachment.
► Fig.15: 1. Hole 2. Bolt 3. Sleeve 4. Pipe
5.
Tighten 2 bolts to fix the attachment.
► Fig.16: 1. Bolt
6. Attach the head of the tool to the attachment.
To fix the head of the tool vertically, fix the attachment
by tightening the bolt to the hole on the attachment
shown in the figure, and then tighten the other bolt.
► Fig.17: 1. Bolt 2. Hole
To fix the head of the tool horizontally, fix the attachment
by tightening the bolt to the hole on the attachment
shown in the figure, and then tighten the other bolt.
► Fig.18: 1. Bolt 2. Hole
To remove the angled attachment, perform the installa-
tion procedure in reverse.
17 ENGLISH