Adjusting Saw Chain Tension; Operation - Makita DUC307 Instruction Manual

Removing the saw chain
To remove the saw chain, perform the following steps:
1. Release the chain brake by pulling the front hand
guard.
2. Turn the adjusting dial to "-" direction to release
the saw chain tension.
► Fig.14: 1. Adjusting dial
3. Pull the lever up while pressing its edge.
► Fig.15: 1. Lever
4. Turn the lever counterclockwise until the sprocket
cover comes off.
► Fig.16: 1. Lever 2. Sprocket cover
5. Remove the sprocket cover then remove the saw
chain and guide bar from the chain saw body.

Adjusting saw chain tension

CAUTION:
Carry out the procedure of install-
ing or removing saw chain in a clean place free
from sawdust and the like.
CAUTION:
Do not tighten the saw chain too
much. Excessively high tension of saw chain may
cause breakage of saw chain, wear of the guide bar
and breakage of the adjusting dial.
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. Pull the lever up while pressing its edge.
► Fig.17: 1. Lever
2. Turn the lever counterclockwise a little to loosen
the sprocket cover lightly.
► Fig.18: 1. Lever 2. Sprocket cover
3. Lift up the guide bar tip slightly and adjust the
chain tension. Turn the adjusting dial to the "-" direction
to loosen, turn to the "+" direction to tighten. Tighten the
saw chain until the lower side of the saw chain fits in the
guide bar rail as illustrated.
► Fig.19: 1. Adjusting dial 2. Guide bar 3. Saw chain
4. Keep holding the guide bar lightly and tighten the
sprocket cover. Make sure that the saw chain does not
loose at the lower side.
5.
Return the lever to the original position.
Make sure the saw chain fits snugly against the lower
side of the bar.

OPERATION

Lubrication
CAUTION:
Do not operate the chain saw when
the tank is empty. Replenish the oil in due time
before the tank is empty.
CAUTION:
Prevent the oil from coming into
contact with the skin and eyes. Contact with the
eyes causes irritation. In the event of eye contact,
flush the affected eye immediately with clear
water, then consult a doctor at once.
CAUTION:
Never use waste oil. Waste oil con-
tains carcinogenic substances. The contaminants
in waste oil cause accelerated wear of the oil
pump, the bar and the chain. Waste oil is harmful
to the environment.
NOTICE:
When the chain saw is used for the first
time, it may take up to two minutes for the saw chain
oil to begin its lubricating effect upon the saw mech-
anism. Run the saw without load until it does so.
NOTICE:
When filling the chain oil for the first time,
or refilling the tank after it has been completely emp-
tied, 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 provided oil tank cap is screwed in place.
Saw chain is automatically lubricated when the tool is in
operation. Check the amount of remaining oil in the oil
tank periodically through the oil inspection window.
► Fig.20: 1. Oil tank cap 2. Oil inspection window
To fill the oil, perform the following steps:
1. Clean the area around the oil tank cap thoroughly
to prevent any dirt from entering the oil tank.
2. Lay the chain saw on its side and remove the oil
tank cap.
3. Fill the oil tank with the oil. The proper amount of
oil is 150 ml.
4. Screw the oil tank cap firmly back in place.
5. Wipe away any spilt chain oil carefully.
NOTE: If it is difficult to remove the oil tank cap, insert
the slotted screwdriver into the slot of the oil tank
cap, and then remove the oil tank cap by turning it
counterclockwise.
► Fig.21: 1. Slot 2. Slotted screwdriver
After refilling, hold the chain saw away from the
tree. Start it and wait until lubrication on saw chain is
adequate.
► Fig.22
16 ENGLISH