19
CARE AND MAINTENANCE
f. Make a few rm strokes on every tooth. File all
left hand cutters in one direction. Then move
to the other side and le the right-hand cutters
in the opposite direction. Occasionally remove
lings from the le with a wire brush (Fig. 10d).
WARNING
• Improper chain sharpening increases the
potential of kickback.
• Failure to replace or repair a damaged chain can
cause serious injury.
Top-Plate Sharpening Angles (Fig. 10e)
CORRECT 30°- This optimal angle can be obtained
only when the specied les and proper setting are
used. File holders are marked with guide marks
to align the le properly to produce the correct top
plate angle.
LESS THAN 30°- The tooth is too dull for cutting.
MORE THAN 30°- The edge of the cutting tooth is
feathered and dulls quickly.
10c
30°
10e
Top Plate Sharpening Angles
Less than 30°
Correct Incorrect Incorrect
More than 30°
10d
Left Hand
Cutters
Right Hand
Cutters
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