12
Adjusting the chain tension
CAUTION:
•
Keep the applicable chain tension. Loose tension can cause the saw chain
to come off during operation. Too tight tension can damage the saw chain or
guide bar.
•
During operation, check the chain tension frequently. The saw chain stretches
and becomes loose during operation. When use a new saw chain, adjust the
tension more frequently.
Adjust the chain tension as the following steps.
1. Loose the nut
(A)
a half turn.
2. Hold the bar nose up. Turn the tensioning screw
(B)
clockwise until the saw
chain fits the underside of the guide bar snugly.
3. Grasp the saw chain in the middle of the guide bar and lift up. The gap
between the guide bar and the tie strap of the saw chain should be
approximately 3 - 4 mm (0.118”-0.157”). If it is not, turn the tensioning
screw counterclockwise slightly and do the step 2 again.
4. Tighten the nut
(A)
securely.
5. If necessary, tighten the tensioning screw a little to prevent it from falling.
Filling the chain oil tank
The saw chain must be lubricated with chain oil during operation.
Before operation, fill the chain oil tank. After supplying the oil, tighten the oil cap
securely.
Use Makita genuine chain oil only.
NOTICE:
•
Never use waste oil. It may damage the oil pump.
• Avoid dusty environment when filling the chain oil. Dust and other foreign
materials may damage the oil feed system.
During operation, always pay attention to the oil level. Refill the tank if the oil
level becomes low. The tank becomes empty in approximately 40 minutes of
operation (depending on the setting of the chain lubrication).
A
B
Adjusting the chain-oil feeding rate
The chain-oil feeding rate is adjustable in three steps. According to the
operation, for example cutting hard limbs, adjust the feeding rate.
To adjust the chain-oil feeding rate, use a flat-bladed screwdriver. Push in the
adjusting screw and turn it. To increase feeding rate, turn the adjusting screw
counterclockwise
(A)
. To reduce feeding rate, turn it clockwise
(B)
.
After adjusting the chain-oil feeding rate, check the feeding rate by driving the
equipment at medium speed.
A
B
