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5.) Sharpen cutters.
a.) Support fiat side of file holder (with
7/32" round file) on cutter top plate.
Figure 36.
b.) Hold the file holder levet with the
30 ° guide mark parallel to the
center line of the bar. Figure 37.
c:) File from inside toward outside of
: cutter, straight across, in one direc-
tion only. Use 2 or 3 strokes per cut-
ring edge. Figure 38.
6.): Correct Depth Gauges.
:a,) Place depth gauge tool over each
cutter depth gauge. Figure 39.
b.), File level with the flat file if depth
. gauge is higher than the depth
gauge tool:
c.) Maintain rounded front corner of
depth gauge with a flat file. Figure
.... , -NOTE: The very top:of the depth
gauge should be flat with the front
half rounded off with a flat file.
b. CHAIN REPLACEMENT
,1.) Replace the chain when cutters or links
break. " -_
_::;_2,) See" your Sears _Service--. Center to
replace and sharpen individual cutters
to match your chain.,
3.) Always replace the worn sprocket
when installing a new chain to avoid
excessive wear to the chain,
........... ' ..... : _ROUND
_ _FILE
SUPPORT =_ [ _F'_ '_/
FLATSIOE :"'"" _ _ "DEPTH
OF, ir:lLE HOLDE R _ GUAGE
ON TOP OF cUTTER. I _]_.
. " TOP PLATE '_.J"_
" ' " ..... , _i SIDE' PLATE "_ "
KEEP:30a MARK,
PARALLEL
TO!THEE
CENTER OF
THE GUIDE
BAR
.' Figure 37
'r-.
2. GUIDE BAR MAINTENANCE
• • Conditions which can require
maintenance- .•
guide, bar
:L :
--saw cuts to one side
--saw has to be forced through a cut
• --inadequate supply of oil to bar and
chain.
• Check the, condition of the guide bar each
time the chain is sharpened. A worn guide
-- bar will damage the chain and make cut-
ting more difficult.
e" Replace the guide bar when:
--the inside groove of the guide bar rails is
worn .... _.
--the guide bar is bent.
a. Remove the guide bar to service.
b. Clean oil holes at least once for each
five hours of operation.
c. Remove sawdust from the guide bar
...... groove periodically with a putty knife or
.... :_.... a wire. Figure 41.
" ..... _ ' d. _Remove burrs, by fiiing ,theside edges _
of the guide bar groc)ves square with a
fiat file. Figure 42.
e. Restore square edges to an uneven rail
top by filing with a flat file. Figure 42.
"H GAUGE TOOL -_,
DEPTH GAUGE
Figure 39
MAINTAIN ROUNDED CORNER
OF DEPTH GAUGE .030"
Figure 40
. ,, . ,..,
FROM GUIDE BAR GROOV_
Vr.'
_ =. , .
CORRECT
GUIDE BAR
GROOVE
iii ii ii_
Figure 41
WORN GROOV'ES" FIL_EEDGES_"
SQUARE
Figure 38 Figure 42 17
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