Ryobi RY5020 Manuel D'utilisation page 30

 Improper filing angle of the side plate can
increase the risk of severe kickback.
 Raker (depth gauge) clearance.
• Too low increases the potential for kickback.
• Not low enough decreases cutting ability.
 If the cutter teeth hit hard objects such as nails
and stones, or are abraded by mud or sand on
the wood, have an authorized service center
sharpen the chain.
NOTE: Inspect the drive sprocket for wear or
damage when replacing the chain. If signs of
wear or damage are present in the areas indi-
cated, have the drive sprocket replaced by an
authorized service center.
NOTE: If you do not fully understand the correct
procedure for sharpening the chain after reading
the instructions that follow, have the saw chain
sharpened by an authorized service center or
replace with a recommended low-kickback chain.
SHARPENING THE CUTTERS
See Figures 47 - 50.
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 pro-
tective gloves when performing maintenance
to the chain to prevent serious personal injury.
 Tension the chain prior to sharpening. Refer to
Adjusting The Chain Tension.
 Use a 3/16 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.
MAINTENANCE
TOP PLATE
RIVET HOLE
RIGHT HAND
 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.
Page 30 — English
CUTTING
CORNER
HEEL
GULLET
LEFT HAND
CUTTERS
CUTTERS
SIDE PLATE
DEPTH GAUGE
TOE
Fig. 47
Fig. 48
Fig. 49
Fig. 50