Ryobi RY10521B Manuel D'utilisation page 29

 Lift the file away from the steel on each return
stroke.
 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.
 Remove filings from the file with a wire brush.
NOTICE:
A dull or improperly sharpened chain can cause
excessive engine speed during cutting, which
may result in severe engine damage.
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.
WARNING:
The saw chain is very sharp, always wear pro-
tective gloves when performing maintenance
to the chain to prevent serious personal injury.
TOP PLATE FILING ANGLE
See Figure 53.
 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 54.
 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.
MAINTENANCE
 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.
Page 29 — English
LEFT HAND
CUTTERS
RIGHT HAND
CUTTERS
TOP PLATE FILING ANGLE
CORRECT
LESS THAN 30°
INCORRECT
SIDE PLATE FILING ANGLE
CORRECT
HOOK
INCORRECT
Fig. 52
30°
MORE THAN 30°
Fig. 53
80°
BACKWARD SLOPE
Fig. 54