Craftsman 138.98946 Operator's Manual page 23

[] 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 cut-
ters in the opposite direction. Occasionally
remove filings from the file with a wire brush.
_, WARNING: Improper chain sharpening
increases the potential of kickback.
_, WARNING: Failure to replace or repair
damaged chain can cause serious injury.
_, WARNING: The saw chain is very sharp,
always wear protective gloves when per=
forming maintenance to the chain.
TOP PLATE FILING ANGLE
See figure 35.
[] 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 36.
[] CORRECT - 80 ° 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 37-39.
[] The Raker (depth gauge) should be main-
tained at a clearance of .025 in. Use a depth
gauge tool for checking the depth gauge
clearances.
23 - English