MAINTENANCE
TOP PLATE FILING ANGLE
See Figure 62.
■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 63.
■CORRECT 80o – Produced automatically if you use the correct diameter file in the file holder.
■HOOK – “Grabs” and dulls quickly, increases the potential of KICKBACK.
Results from using a file with a diameter too small or a file held too low.
■BACKWARD SLOPE – Needs too much feed pressure, causes excessive wear to the bar and chain.
Results from using a file with a diameter too large or file held too high.
TOP PLATE FILING ANGLE 30°
CORRECT
LESS THAN 30° | MORE THAN 30° |
INCORRECT
Fig. 62
SIDE PLATE FILING ANGLE
80°
CORRECT
HOOK | BACKWARD SLOPE |
INCORRECT | Fig. 63 |
MAINTAINING DEPTH GAUGE CLEARANCE
See Figure 64, 65, and 66.
■Maintain the depth gauge at a clearance of .025 in.
(0.6 mm). Use a depth gauge tool for checking the depth gauge clearances.
■Every time the chain is filed, check the depth gauge clearance.
■Use a flat file and a depth gauge jointer to lower all gauges uniformly. Use a .025 in. (0.6mm) depth gauge jointer. After lowering each depth gauge, restore original shape by rounding the front. Be careful not to damage adjoining drive links with the edge of the file.
■Depth gauges must be adjusted with the flat file in the same direction the adjoining cutter was filed with the round file. Use care not to contact cutter face with flat file when adjusting depth gauges.
DEPTH GAUGE
.025 in.
(0.6 mm)
Fig. 64
DEPTH GAUGE JOINTER
FLAT FILE
Fig. 65
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