27
WARNING:
Improper chain sharpening increases the
potential of kickback.
5. Put a few firm strokes on every tooth. File all left
hand cutters in one direction. Then move to the
other side and file the right hand cutters in the
opposite direction. Occasionally remove filings from
the file with a wire brush.
TOP PLATE FILING ANGLE
See Figure 36.
■ CORRECT 30° - File holders are marked with guide
marks to align file properly to produce correct top
plate angle.
■ LESS THAN 30° - For Cross Cutting.
■ MORE THAN 30° - Feathered Edge Dulls Quickly.
SIDE PLATE ANGLE
See Figure 37.
■ CORRECT- 80
o
Produced automatically if correct
diameter file is used in file holder.
■ HOOK- “Grabs” and dulls quickly. Increases
potential of KICKBACK.
Results from using a file with diameter too small, or
file held too low.
■ BACKWARD SLOPE- Needs too much feed
pressure, causes excessive wear to bar and chain.
Results from using a file with diameter too large, or
file held too high.
DEPTH GAUGE CLEARANCE
See Figure 38.
1. The depth gauge should be maintained at a clear-
ance of .025 in. (0.6 mm). Use a depth gauge tool for
checking the depth gauge clearances.
2. Every time the chain is filed, check the depth gauge
clearance.
INCORRECT TOP PLATE
FILING ANGLE
MORE
THAN 30°
LESS
THAN 30°
Fig. 36
30°
LEFT HAND
CUTTERS
RIGHT HAND
CUTTERS
CORRECT TOP PLATE
FILING ANGLE
INCORRECT SIDE PLATE
FILING ANGLE
BACKWARD
SLOPE
HOOK
Fig. 37
80°
CORRECT SIDE
PLATE FILING
ANGLE
WARNING:
Failure to replace or repair damaged chain can
cause serious injury.
WARNING:
The saw chain is very sharp, always wear
protective gloves when performing maintenance
to the chain.
Fig. 35
RAKER CLEARANCE
.025 in. (0.6 mm)
Fig. 38
MAINTENANCE
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