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. 36
WARNING:
The saw chain is very sharp, always wear protective gloves when performing maintenance to the chain.
TOP PLATE FILING ANGLE
See Figure 36.
nCORRECT 30° - File holders are marked with guide marks to align file properly to produce correct top plate angle.
nLESS THAN 30° - For Cross Cutting.
nMORE THAN 30° - Feathered Edge Dulls Quickly.
SIDE PLATE ANGLE
See Figure 37.
nCORRECT - 80o Produced automatically if correct diam- eter file is used in file holder.
nHOOK - “Grabs” and dulls quickly. Increases potential of KICKBACK.
Results from using a file with diameter too small, or file held too low.
nBACKWARD 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.
nThe depth gauge should be maintained at a clearance of
.025 in. (0.6 mm). Use a depth gauge tool for checking the depth gauge clearances.
nEvery 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. 37
RAKER CLEARANCE
.025 in. (0.6 mm)
Fig. 38
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