Maintenance – Homelite UT10901B User Manual

Page 28

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Page 28

TOP PLATE FILING ANGLE

See Figure 55.

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 56.

CORRECT 80

o

– 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.

.025 in.

(0.6 mm)

DEPTH GAUGE

Fig. 57

FLAT FILE

DEPTH GAUGE JOINTER

Fig. 58

MAINTENANCE

INCORRECT

BACKWARD SLOPE

SIDE PLATE FILING ANGLE

Fig. 56

80°

CORRECT

HOOK

INCORRECT

MORE THAN 30°

TOP PLATE FILING ANGLE

LESS THAN 30°

Fig. 55

30°

CORRECT

MAINTAINING DEPTH GAUGE CLEARANCE

See Figures 57, 58, and 59.

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.

RESTORE ORIGINAL

SHAPE BY ROUNDING

THE FRONT

Fig. 59

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