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MAINTENANCE
A,
A good maintenance program of regular inspec-
tion and care will increase the service life and help
to maintain the safety and performance of your
saw.
• Make all adjustments or repairs (except car-
buretor adjustments) with:
spark plug wire disconnected
-- engine cool as opposed to a unit that has
just been run.
GUIDE BAR AND CHAIN
Increase the service life of your Guide Bar and
Chain by:
--Using the saw propedy and as recommended
in this manual.
--Maintaining correct Chain Tension, page 9.
--Proper lubrication, page 10.
--Regular maintenance as described in this sec-
tion.
• Check the saw for loose bolts, screws, nuts,
and fittings on a regular basis. Loose fasten-
ers can cause an unsafe condition as well as
damage to your saw.
_WARNING
Have all chain saw service (other than the items listed
in the maintenance section of this manual) performed
by a qualified service dea el'. I
1. CHAIN MAINTENANCE
• Sharpen the chain when:
--wood chips are small and powdery. Wood
chips made by the saw chain should be
about the size of the teeth of the chain.
--.saw has to be forced through the cut.
--saw cuts to one side.
[CAU-TION_IAlways wear gloves when handling
the chain. The chain is sharp enough to cut you
SUPPORT
FLAT $1DE
OF FILE HOLDER
ON TOP OF CUTTER
ROUND
FILE
GUAGE
TOP PLATE
Figure 32
KEEP 30° MARK " I
PARALLEL TO 7_;__ICUTTER
THE CENTER OF
Figure 33
even though it is too dull to cut wood.
a. SHARPENING INSTRUCTIONS
Items required:
Gloves Medium Flat File
7132" dia. file Depth Gauge Tool
6" file holder Vise
1.) Stop engine and disconnect spark plug.
CUTTERS
SAME LENGTH REMOVEI)AMAGE
/ \ / \
TOpPLATE SIDEPLATS
2.)
Figure 34
Figure 35
3.)
4.)
Adjust the chain for proper tension, page
9.
Work at the midpoint of the bar, moving the
chain forward by hand as each cutter is
filed.
Sharpen cutters.
a.) Position flat side of file holder (with
7/32" round file)on cutter top plate and depth
gauge. Figure 32 •
b. ) Hold the file holder level with the 30° guide
mark parallel to the center of the chain,
Figure 33.
c.) File from inside toward outside of cutter,
straight across, on forward stroke only. Use
2 or 3 strokes per cutting edge. Figure 33.
d. ) Keep all cutters the same length. Figure 34.
e. ) Fileenoughtoremoveanydamagetocutting
edge(side & top plate) of cutter. Figure 34.
f.) File72SG chain to meet specifications shown
in Figure 35.
DEPTH GAUGE
DEPTH GAUGE
i=!gure36
HOOK TOO MUCH SQUARED
ANGLE 025 HOOK ANGLE OFF CORNER
RIGHT WAY WRONG WAY
Figure37
/.;",WARNING .
Maintain the proper hook angle according to the
manufacturer's specification for the chain you are
using, Too much hook angle will increase the chance
of kickback which can result in serious personal
injury, Figure 35&37.
16
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