Ryobi RY42102 Operator's Manual page 64

SHARPENING THE CUTTERS
See Figures 37 - 40.
Be careful to file all cutters to the specified angles
and to the same length, as fast cutting can only be
obtained when all cutters are uniform.
WARNING:
The saw chain is very sharp. Always wear
protective gloves when performing maintenance
to the chain to prevent serious personal injury.
 Properly 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
potential of kickback, which can 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.
MAINTENANCE
TOP PLATE
RIVET HOLE
RIGHT HAND
Page 30 — English
CUTTING
CORNER
HEEL
GULLET
LEFT HAND
CUTTERS
CUTTERS
SIDE PLATE
DEPTH GAUGE
TOE
Fig. 37
Fig. 38
Fig. 39
Fig. 40