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5.)CorrectDepth Gauges.
a.) Place depth gauge toolover each cutter
depthgauge.Figure32,
b.) File level withtheflat file ifdepth gauge is
higher than the depth gauge toel.
c.) Maintainroundedfrontcomerofdepthgauge
withaflat file, Figures32 &33.
NOTE: The very top of the depth gauge
should be flat withthe front half rounded
offwith a flat file.
2. GUIDE BAR MAINTENANCE
• Conditions which can require guide bar
maintenance:
--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 cutting
moredifficult,Reversebar after everycleaning.
I ........... A WARNING r
Depth gauge tool is required to insure proper depth
gauge. Filing the depth gauge too deep will increase
the chance of kickback which can result in serious
;injury. •
b. CHAIN REPLACEMENT
1.) Useonly the Low.KickChain specified for
your saw in "Specifications" for replace-
mentchain.
2.) Replace the chain when cutters or links
break.
3.) See your Sears Service Centerto replace
and sharpen individual cuttersfor match-
ing your chain.
4.) Always havea wornsprocket replaced by
your Sears ServiceCenter when-installing
a newchain to avoidexcessivewear to the
chain.
• Replace the guide bar when:
--the inside groove of the guide bar rails is
worn.
--the guide bar is bent or cracked.
Use only the replacement Reduced-Kickback
Guide Bar specified for your saw in "Specifi-
cations:'
a. Remove the guide bar to service,
b, Clean oil holes at least once for each five
hours of operation. Figure 34.
c. Remove sawdust from the guide bar
groove periodically with a putty knife or
a wire. Figure34.
d. Remove burrs by filing the side edges
of the guide bar grooves square with a
flat file. Figure35.
e. Restore square edges to an uneven rail
top by filing with a fiat file. Figure35
REMOVE SAWDUST
FROM GUIDE BAR GROOVE
CORRECT
GUIDE BAR
GROOVE
WORN GROOVES FILE EDGES
SQUARE
Figure34
EL SPARK ARRES'irOR ANb SPARK PLUG
1. SPARK ARRESTOR
• Carbon deposits build up on the spark ar-
restor asthesawisusedand mustbe removedto
avoidcreatingafirehazardorcausing enginedam-
age,
• Replace thesparkarrestorif breaksoccur.
e
Keep the spark arrestor clean at all times.
Clean:
--as required
---at leastonce for each25-30hoursofoperation
i
Rgure 35
I [ IIIII II
ffEAT _SH!E_=LD_
SPARK ARRESTOR SCREEN
Figure36
2. SPARK PLUG
• Replace the spark plug when necessary. Use
Stock No. 71-36401.
Itemsrequired:
wire brush, 3/8"wrench
a. Disconnectthesparkplug wire.
b. Remove the heatshield. Figure'36.
c, Remove the screen from the diffuser.
d, Clean the screen witha wire brush or replace if
breaks'are found.
e. Reassemble parts,
• ffyou perform thismaintenance youmelf, note
the "Caution" below.
CAUTION:J Do not .mix chrome.colored fan
housing screws with the block-colored ojtinder
shroud screws.Otherthan color, these_ me
similar in appearance; but ff Interchanged, they
can strip out and/or cause permlimmt engine
.damage.
i7
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