Makita EY2650H Original Instruction Manual page 12

Assembling saw chain and guide bar
CAUTION: Make sure that the saw chain, guide bar and sprocket match
each other in gauge and pitch.
Assemble the saw chain and guide bar as the following steps.
1. Loosen the nut (A) and remove the bar holder (B).
2. Fit the saw chain (C) into the groove of guide bar (D). Start at the bar nose.
3. Fit the saw chain (C) onto the sprocket (E).
4. Install the guide bar (D) so that the tensioning nut (F) fits into the hole (G)
on the guide bar. Holes (H) are not used.
5. Fit the bar holder (B) and tighten the nut (A) securely. Then loose the nut a
half turn as a provision of the chain tension adjustment.
6. Adjust the chain tension. Refer to the section "Adjusting the chain tension."
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. A fter 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. Refill 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).
E
G
B
12
A
B
F
H C
D
F
A