Adjusting Saw Chain Tension; Operation - Makita DUA301 Instruction Manual

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.19: 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.20: 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.21: 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.22: 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.23: 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.24: 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.25
Attaching the shoulder harness
CAUTION:
When you use the tool in combi-
nation of the backpack-type power supply such
as portable power pack, do not use the shoulder
harness included in the tool package, but use the
hanging band recommended by Makita.
If you put on the shoulder harness included in the
tool package and the shoulder harness of the back-
pack-type power supply at the same time, removing
the tool or backpack-type power supply is difficult in
case of an emergency, and it may cause an accident
or injury. For the recommended hanging band, ask
Makita Authorized Service Centers.
CAUTION:
Always use the shoulder harness
attached to the tool. Before operation, adjust the
shoulder harness according to the user size to
prevent fatigue.
CAUTION:
Before operation, make sure that
the shoulder harness is properly attached to the
hanger on the tool.
CAUTION:
Before operation, make sure that
the buckle of the shoulder harness is fastened
firmly.
CAUTION:
Always use the shoulder harness
dedicated to this tool. Do not use other shoulder
harnesses.
1. Put on the shoulder harness and fasten the
buckle.
► Fig.26: 1. Buckle
NOTE: When removing the shoulder harness, unlock
the buckle and remove the shoulder harness.
2.
Adjust the shoulder harness to a comfortable
working position.
► Fig.27
3. Clasp the hook on the shoulder harness to tool's
hanger.
► Fig.28: 1. Hook 2. Hanger
The shoulder harness features a means of quick
release. Simply squeeze the sides of the buckle to
release the shoulder harness.
► Fig.29: 1. Buckle
19 ENGLISH