Operator`s manual

CUSTOMER RESPONSIBILITIES
SHARPENING CHAIN
(Fig. 21,22, 23, 24, 25, 26 & 27)
_ ARNING
IMPROPER CHAIN SHARPENING TECH-
NIQUES AND/OR DEPTH GAUGE MAIN-
TENANCE WILL INCREASE THE CHANCE
OF KICKBACK, WHICH CAN RESULT IN
SERIOUS INJURY.
ALWAYS WEAR GLOVES WHEN HAN-
DLING THE CHAIN. THE CHAIN CAN BE
SHARP ENOUGH TO CUT YOU EVEN
THOUGH IT ISTOO DULLTO CUT WOOD.
Toolsrequired:
• Flat file
• .025 depth gauge
• 4.5mm roundfile & file holder
Conditionswhichindicate the need for chainsharpening:
• 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 woodwill not produce a good chip.
• Saw cuts to one side or at an angle.
• Saw requires excessiveforce to cut.
• Noticeable loss of cuttingspeed.
CHAIN TERMINOLOGY & PART NAMES
Preset Tie Strap
Left Hand Cutter
___,_ Drive Link
Right Hand Cut_;r_ --
Guard Tie Strap
CHAIN CUTTER PART NAMES
Top Plate ._,..,..,_._G,ullet
Side Plate_-_/_DeP;e
CHAIN "PITCH" CHAIN"GAUGE"
This distance Thickness of boitorn _
divideClby tw_ section of drive link
Pitch refers to chain mea-
surement. A chain'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 i
groove.
Sharpening instructions:
• Move on/stop switchto the "stop" position.
• Check chain for proper tension.Adjust chain tension if
necessary.(See Chain Tension/Adjustment).
• Check and lower depth gauges before sharpening cut-
ters.
• Depth gauges should be checked 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.
-18-
Figure 21
.030"
_1 Rounded
Right Way
O-Y_O
Wrong Way
Figure 22
• To sharpen the cutters, position the file holder level (90°)
so that it rests on the top edges of the cutter and depth
gauge. See Figure 23.
NOTE - The chain has both leftand righthand 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 parallelto the center
of the chain. Reverse procedure for other side. See
Figure 25.
• 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 specificationsshown below. See
Figure 27.