SNOWJOE SUNJOE GTS4002C Operator's Manual page 18

• Turn the bar over in the vise and repeat on all the other
cutting edges.
• Check that the depth limiter tooth does not stick out farther
than the inspection tool and file any projecting parts with a
flat file, rounding off the edges (Fig. 30).
• After sharpening, remove all traces of filing and dust
and lubricate the chain in an oil bath. Replace the chain
whenever:
– The length of the cutting edges decreases to
5 mm or less;
– There is too much play between the links and the rivets.
Fig. 30
Cutting edge
Guide Bar Maintenance
When the guide bar shows signs of wear, turn it over on the saw
to distribute the wear for maximum bar life. Feathering or burring
of the bar rails is a normal process of bar wear. You should
smooth such faults with a file as soon as they occur.
Replace a bar with any of the following faults:
• wear inside the bar rails permitting the chain to lay over
sideways
Depth
Inspection tool
limiter
tooth
Depth limiter tooth
18
• bent guide bar
• cracked or broken rails
• spread rails
Turn the saw over, check the underside of the guide bar, and
make sure that the lubrication holes and chain groove are free
from impurities.
Chain Sprocket
Regularly check the condition of the sprocket and replace it
when wear exceeds 0.5 mm (Fig. 31).
Do not mount a new chain with a worn sprocket or vice-versa.
Fig. 31
< 0.5 mm