Craftsman 358.351080 - Manual (Page 18)

CUSTOMER RESPONSIBILITIES
If chain is too loose, refer to “Chain Adjustment.” Loosen
bar clamp nuts; then, turn adjusting screw 1/4 turn clock­
wise. Lift up tip of guide bar to check for sag. Retighten
bar clamp nuts. Figure 20.
Adjusting Screw
1/4 Turn
CRflFTSMgr
Tool H
FlQure 20
SHARPENING CHAIN
(Fig. 21,22,23,24,25,26 & 27)
A
WARNING:
IMPROPER’ chain sharpening TECH­
NIQUES AND/OR DEPTH GAUGE MAINTE­
NANCE WILL INCREASE THE CHANCE OF
KICKBACK, WHICH CAN RESULT IN SERI­
OUS INJURY.
ALWAYS WEAR GLOVES WHEN HANDLING
THE CHAIN. THE CHAIN CAN BE SHARP
ENOUGH TO CUT YOU EVEN THOUGH IT IS
TOO DULL TO CUT WOOD.
CHAIN TCRMINOLOGY & PART NAMES
Preset Tie Strap
Left Hand Cutter
Tie
Right Hand Cutter
Guard Tie Strap
CHAIN CUTTER PART NAMES
Top Plate Gullet
Side Plate -
Depth Gauge
Rivet Hole
CHAIN “PITCH” CHAIN “GAUGE”
I til«! tfistance ’
jdrvkfeíí fay
Thit:KA«SS of bottom
s«ctiofl Of diwo ^ ~
Pitch refers to chain mea­
surement A chsiin's pitch is
the distance between any
three of its rivets divided by
two.
Gauge refers to thickness
of that portion of drive link
which fits into saw bar
groove.
Tools required:
• Fiat file
• .025 depth gauge
• 4.5mm round file & file holder
Conditions which indicate the need for chain sharpening:
• Reduction in size of wood chips. The size of the wood
chip will decrease 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 requires excessive force to cut.
• Noticeable loss of cutting speed.
Sharpening instructions:
• Move on/stop switch to the “Stop” position.
• Chisck chain for proper tension. Adjust chain tension if
necessary. (See Chain Tension/Adjustment).
• Check and lower depth gauges before sharpening cutters.
• Depth gauges should be chadded every third sharpen­
ing. When cutting frozen wood the depth gauges should
be checked each time you sharpen the chain.
• To check depth gauge, place gauge tool on cutter. If the
depth gauge projects above the tool, then file it level to
the top of the depth gauge tool. See Figure 21.
Depth Gauge TooL'
Depth Gauge
Figure 21
.030"
Rounded
Corner
O O
Right Way
Squared
Off Comer
Q^O
Wrong Way
Figure 22
• To sharpen the cutters, position the file holder le\rai (90°)
so that it rests on the top edges of the cutter and depth
gauge. See Figure 23.
NOTE: The chain has both left and right hand cutters.
• Sharpen cutters on one side of the chain first. File from
the inside of each cutter to the outside. Then turn your
saw around and repeat the process for the other side of
the chain. See Figure 24.
• File on the forward stroke only. Use 2 or 3 strokes per
cutting edge.
• Keep the 30° line on the file holder parallel to the center
of the chain. Reverse procedure for other side. See
Figure 2S.
• Keep all cutters the same length when filing. See Figure
26.
• File enough to remove any damage to cutting edges
(side plate and top plate) of cutter. See Figure 26.
• File chain to meet the specifications shown below. See
Figure 27.
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