MAINTENANCE
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.
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 performing maintenance to the chain.
TOP PLATE FILING ANGLE
See Figure 36.
LEFT HAND
CUTTERS
RIGHT HAND |
|
|
CUTTERS |
| Fig. 35 |
CORRECT TOP PLATE | INCORRECT TOP PLATE | |
FILING ANGLE | FILING ANGLE | |
| LESS | MORE |
30° | THAN 30° | THAN 30° |
|
| |
Fig. 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 SIDE
PLATE FILING
ANGLE
80°
INCORRECT SIDE PLATE
FILING ANGLE
HOOK BACKWARD SLOPE
■CORRECT- 80o 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.
27
Fig. 37
RAKER CLEARANCE
.025 in. (0.6 mm)
Fig. 38