Craftsman 247.77638 Operator's Manual page 16

Service IVluffler
Temperature of mufflerand nearbyareas mayexceed 150 ° F (65°C).
Avoidthese areas.
• Inspectmufflerevery 50 hours,and replaceif necessary.
Replacement p arts for themufflermustbe the sameand installed
in the samepositionas theoriginal parts.
Clean Engine
Dailyor beforeevery use, cleangrass,chaffor accumulated
debrisfromengine.Keeplinkage,spring,and controlsclean.
Keeparea aroundand behindmufflerfreeof any combustible
debris.
• Keepingenginecleanallows air movement a roundengine.
• Engineparts shouldbe keptcleanto reducethe risk of overheat-
ingand ignition of accumulated debris.
Do not usewaterto cleanengine parts.Watercouldcontaminate fuel
system.Usea brushor dry cloth.
Carburetor Adjustment
Thecarburetoron this engineisnot adjustable.
Engine Speed
LUBRICATION
Do not,attempt t o alterthe enginespeedby tamperingwith the
engines governorlinkage.Doingsocould resultin seriouspersonal
I injuryand damageto the engine.The engineRPM hasbeen set at
thefactory.
• Hopper Assembly- Lubricatethe pivotpointson the hopper
assemblywith light oil oncea season.
• Discharge Chute- Lubricatethe pivot pointson the discharge
chutewith light oil once a season.
• Release Rod- Lubricatethe releaserodand springwith lightoil
oncea season.
CLEAN EQUIPMENT
• Cleanthechippershredderthoroughlyafter eachuse.
• Washbag periodicallywith water.Allowto dry thoroughlyin
shade.
• If the flail screenbecomesclogged,removeand cleanas
instructedbelow.
NOTE:Cleaningwith a forcefulspray of wateris not recommended as
it couldcontaminatethefuel system.
REMOVING THE FLAIL SCREEN
Beforeperforming any type of maintenanceon the machine wait for
all partsto stop movingand disconnectthe spark plugwire. Failure
to followthis instructioncouldresult in personalinjuryor property
damage.
If the dischargearea becomesclogged,removethe flail screenand
cleanarea as follows:
Stopthe engine.Makecertainthe chippershredderhascome to
a completestop.
Disconnectsparkplug wirefrom spark plug and groundagainst
the engine.
A. Removethe bagand two wingknobson each sideof thechute
deflector.See Figure14.
.
3.
f
/
s /
s'
/ /
/
//
/
j
Figure14
B. Lift the chutedeflectorup to keepit out of the way.
C. Removethetwo hairpinclips fromeach clevispin which
extendthroughthe housingand removepins.
D. Removetheshredderscreenfrom insidethe housingand
cleanthe screenby scraping or washingwithwater.See Fig. 14.
4. Reinstall t he screen,makingcertain to reassemblethe flail screen
with the curve sidedown.
5. Reattachthechute deflectorwith the hardwarepreviouslyremoved
and connectthe bagto unit.
SHARPENING OR REPLACING CHIPPER
BLADES
1. Disconnectthe sparkplug wireand groundagainstthe engine.
2. Removethe flail screenas instructedin the previoussection.
3. Removethe chipperchute by removingthreehexnuts and
washers.
4. Removethe chipperchute supportbracefrom the frameby
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