Ryobi RY43200, Operator'S Manual

Page: 20 / 68

Page 20 — English
MAINTENANCE
HOW TO SHARPEN THE CUTTERS
See Figures 20 - 23.
Be careful to file all cutters to the specified angles
and to the same length, as fast cutting can be
obtained only when all cutters are uniform.

Stop the motor and disconnect from power
supply.

Tighten the chain tension enough that the chain
does not wobble. Do all of your filing at the mid-
point of the bar. Wear gloves for protection.

Use a 5/32 in. diameter round file and holder.

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 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. Occasionally remove filings
from the file with a wire brush.
NOTICE:
Dull or improperly sharpened chain can cause
excessive motor speed during cutting which
may result in severe motor damage.
WARNING:
Improper chain sharpening increases the po-
tential of kickback. Failure to replace or repair
damaged chain can cause serious injury.
TOP PLATE FILING ANGLE
See Figure 24.

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.
Fig. 22
LEFT HAND
CUTTERS
RIGHT HAND
CUTTERS
Fig. 23
Fig. 21
INCORRECT TOP PLATE
FILING ANGLE
MORE
THAN 30°
LESS
THAN 30°
Fig. 24
30°
CORRECT TOP PLATE
FILING ANGLE