Ryobi RY5020 Manuel D'utilisation page 31

WARNING:
Improper chain sharpening increases the poten-
tial of kickback, which can result in serious
personal injury.
WARNING:
Failure to replace or repair a damaged chain
can cause serious injury.
TOP PLATE FILING ANGLE
See Figure 51.
 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.
TOP PLATE FILING ANGLE
CORRECT
LESS THAN 30°
INCORRECT
SIDE PLATE FILING ANGLE
CORRECT
HOOK
INCORRECT
MAINTENANCE
30°
MORE THAN 30°
Fig. 51
80°
BACKWARD SLOPE
Fig. 52
Page 31 — English
SIDE PLATE ANGLE
See Figure 52.
 CORRECT 80° – 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.
MAINTAINING DEPTH GAUGE
CLEARANCE
See Figure 53 - 55.
 Maintain the depth gauge 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 clearance.
RAKER (DEPTH GAUGE) CLEARANCE
DEPTH GAUGE JOINTER
.025 in.
Fig. 53
FLAT FILE
Fig. 54
RESTORE ORIGINAL
SHAPE BY ROUNDING
THE FRONT
Fig. 55