Adjusting Saw Chain Tension; Operation - Makita DUA300ZB Instruction Manual

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. Sprocket 2. Hole
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. 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.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

OPERATION

Lubrication
NOTICE:
When filling the chain oil for the first
time, or refilling the tank after it has been com-
pletely emptied, add oil up to the bottom edge of
the filler neck. The oil delivery may otherwise be
impaired.
NOTICE:
Use the saw chain oil exclusively for
Makita chain saws or equivalent oil available in
the market.
NOTICE:
Never use oil including dust and parti-
cles or volatile oil.
NOTICE:
When pruning trees, use botanical oil.
Mineral oil may harm trees.
NOTICE:
Before the cutting operation, make sure
that the oil tank cap is tightened securely.
Saw chain is automatically lubricated when the tool is in
operation. Check the amount of remaining oil in the oil
tank periodically.
► Fig.13: 1. Oil tank
To refill the tank, place the tool on a flat surface, then
push the button on the oil tank cap so that the button on
the other side stands up, and then remove the oil tank
cap by turning it.
The proper amount of oil is 160 ml. After refilling the
tank, make sure that the oil tank cap is tightened
securely.
► Fig.14: 1. Oil tank cap 2. Tighten 3. Loosen
NOTE: If it is difficult to remove the oil tank cap,
insert the box wrench into the slot of the oil tank
cap, and then remove the oil tank cap by turning it
counterclockwise.
► Fig.15: 1. Slot 2. Box wrench
After refilling, hold the tool away from the tree. Start it
and wait until lubrication on saw chain is adequate.
► Fig.16
17 ENGLISH