MAINTENANCE
WARNING:
Improper chain sharpening increases the potential of kickback.
WARNING:
Failure to replace or repair damaged chain can cause serious injury.
correcT TOP PLATE
FILING ANGLE
30°
INcorrecT TOP PLATE FILING
ANGLE
LESS | MORE |
THAN 30° | THAN 30° |
Fig. 35
WARNING:
The saw chain is very sharp, always wear protective gloves when performing 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 - 80o Produced automatically if correct diam- eter 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 depth gauge should be maintained at a clearance of
.025 in. Use a depth gauge tool for checking the depth gauge clearances.
Every time the chain is filed, check the depth gauge clear- ance.
correct SIDE | INcorrect SIDE PLATE | |
PLATE FILING | FILING ANGLE | |
ANGLE |
|
|
| HOOK | BACKWARD |
|
| SLOPE |
80° |
|
|
Fig. 36
raker clearance
.025 in.
Fig. 37
23