Ryobi RY43154 Operator's Manual page 32

 Tension the chain prior to sharpening. Refer to
Adjusting the Chain Tension.
 Use a 5/32 in. diameter round file and holder.
Do all of your filing at the midpoint of the bar.
 Keep the file level with the top plate of the tooth.
Do not let the file dip or rock.
 Using light but firm pressure. Stroke towards
the front corner of the tooth.
 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.
WARNING:
Improper chain sharpening increases the poten-
tial of kickback, which could result in serious
personal injury.
WARNING:
Failure to replace or repair a damaged chain
could cause serious injury.
NOTICE:
A dull or improperly sharpened chain can cause
excessive motor speed during cutting, which
may result in severe motor damage.
TOP PLATE FILING ANGLE
See Figure 47.
 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.
MAINTENANCE
RIGHT HAND
Page 32 — English
LEFT HAND
CUTTERS
CUTTERS
TOP PLATE FILING ANGLE
30°
CORRECT
LESS THAN 30°
INCORRECT
Fig. 44
Fig. 45
Fig. 46
MORE THAN 30°
Fig. 47