Chain Maintenance - Ryobi RY40050 Manual Del Operador

CHAIN MAINTENANCE

See Figure 20.
For smooth and fast cutting, the chain needs to
be maintained properly. The following conditions
indicate that the chain requires sharpening:
 Wood chips are small and powdery
 Chain must be forced through the wood during
cutting
 Chain cuts to one side
During maintenance of the chain, consider the
following:
 Improper filing angle of the side plate can in-
crease the risk of a severe kickback.
 Depth gauge (or raker clearance) setting de-
termines the height the cutter enters the wood
and the size of the wood chip that is removed.
Too much clearance increases the potential for
kickback. Too little clearance decreases the size
of the wood chip thus decreasing the chain's
cutting ability.
 If cutter teeth have hit hard objects such as nails
and stones, or have been abraded by mud or
sand on the wood, have service dealer sharpen
chain.
HOW TO SHARPEN THE CUTTERS
See Figures 21 - 24.
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.
 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.
MAINTENANCE
RAKER (DEPTH GAUGE)
TOP
PLATE
RIVET HOLE
WARNING:
Improper chain sharpening increases the potential
of kickback. Failure to replace or repair damaged
chain can cause serious injury.
Page 18 — English
CLEARANCE
PARTS OF A CUTTER
HEEL
GULLET
.025 in.
Fig. 20
CUTTING
CORNER
SIDE PLATE
DEPTH GAUGE
TOE
Fig. 21
Fig. 22
Fig. 23