Chain Sharpening - Craftsman 358.341950 Operator's Manual

,_LWARNING: Disconnect the
spark plug before performing mainte-
nance, service, or adjustments except
for carburetor adjustments.
CHAIN SHARPENING
,_WARNING: Improper chain
sharpening techniques and/or depth
gauge maintenance will increase the
chance of kickback which can result in
serious injury.
WAR NI N G: Wear protective
gloves when handling chain. The chain
is sharp and can cut you even when it is
not moving.
Conditions which indicate the need for
chain sharpening:
• Reduction in size of wood chips.
The size of the wood chip will de-
crease as the chain gets duller until it
becomes more like a powder than a
chip. Note that dead or rotted wood
will not produce a good chip.
• Saw cuts to one side or at an angle.
• Saw has to be forced through the cut.
Tools required:
• 5/32 inch (4 mm) diameter round file
and file holder
• Flat file
• Depth gauge tool
TO SHARPEN CHAIN:
1. Move ON/STOP switch to the STOP
position.
2. Check chain for proper tension.
Adjust chain tension if necessary.
See CHAIN TENSION section.
3. Sharpen cutters.
• To sharpen the cutters, position
the file holder level (90 °) so that
it rests on the top edges of the
cutter and depth gauge.
NOTE: The chain has both left
and right hand cutters.
File Holder _.. _
Cutte_e_pth Gauge r
• Align the 30 ° file holder marks
parallel with the bar and to the
center of the chain.
'X_ Cutter
30° /,, v, , Cutter
File Holder Line
• Sharpen cutters on one side of
the chain first. File from the inside
of each cutter to the outside.
Then, turn the chain saw around
and repeat the process for the
other side of the chain.
• File on the forward stroke only.
Use 2 or 3 strokes per cutting
edge.
• Keep all cutters the same length
when filing.
• File enough to remove any dam-
age to cutting edges (side plate
and top plate of cutter).
All Cutters Remove Damage
Same Length / \.
-,4 "-J ",4 r Side Plate
• File chain to meet the specifica-
tions as shown.
,__ 80° //"-,...60°
j \\\ / ",,\,
30° , _ _
Hook Angle
\
0.025 inch
O__O"_ : (0.65 mm)
_ounded
Right Corner
Too Much Hook Angle Squared Off
Corner
Wrong
_WARNING: Maintain the proper
hook angle according to the manufac-
turer's specifications for the chain you
are using. Improper hook angle will
increase the chance of kickback which
can result in serious injury.
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