Craftsman 8.5 Hp Chipper Shredder Owners Manual

							  
changes(becomesstdngy,etc.)oriftherateatwhich 
thematerialisdischargedslowsdownconsiderably,it 
islikelythattheshreddingbladeand/orchipper 
bladesaredullandneedtobesharpenedor 
replaced.RefertoServiceandAdjustmentssection. 
IMPORTANT:Thereisaflailscreenlocatedinside 
thehousinginthedischargearea.Iftheflailscreen 
becomesclogged,removeandcleanasinstructedin 
theServiceandAdjustmentssection. A WARNING:Thechipper-shredder 
dischargesmaterialswithconsiderable 
velocity.Keepawayfromtheareaaroundthe 
dischargechute.Alwaysstoptheengineand 
disconnectsparkplugwirewhenremovingor 
attachingthebag,changingcontainers,or 
removingtheshreddedmatarial.Wearsafety 
glassesandgloveswheneverusingyour 
chipper-shredder. 
Shredmaterialupto1/2inchindiameter 
/ Chipmaterialupto3inches 
indiameter 
Catchshreddedmaterial 
incatcherbag 
Lowerthehoppertocollect 
rakedmaterialforshredding 
Figure12 
GENERALRECOMMENDATIONS 
Alwaysobservesafetyruleswhenperforming 
anymaintenance. 
Thewarrantyonthischippershredderdoesnot 
coveritemsthathavebeensubjectedtooperator 
abuseornegligence.Toreceivefullvaluefrom 
thewarranty,operatormustmaintainthechipper- 
shredderasinstructedinthismanual. 
Someadjustmentswillneedtobemade 
periodicallytomaintainyourunitproperly. 
AlladjustmentsintheServiceandAdjustments 
sectionofthismanualshouldbecheckedatleast 
onceeachseason. 
Followthemaintenanceschedulegivenbelow. 
Periodicallycheckallfastenersandmakesure 
thesearetight. A WARNING:Alwaysstoptheengineand 
disconnectthesparkplugwirebefore 
performinganymaintenanceoradjustments. 
Neverremovedischargechutetillthe 
enginehascompletelystopped. 
CLEANING 
Cleanthechipper-shredderbyrunningwater 
fromahosethroughthehopperassemblyand 
chipperchutewiththeenginerunning.Allowthe 
chipper-shreddertodrythoroughly. 
Washthebagpedodicallywithwater.Allowtodry 
thoroughlyintheshade.Donotuseheat. 
ENGINEMAINTENANCE 
EngineOil 
OnlyusehighqualitydetergentoilratedwithAPI 
serviceclassificationSF,SGorSH.Selectthe 
oilsviscositygradeaccordingtoyourexpected 
11  
						

							  
CUSTOMERRESPONSIBILITIES 
o 
MAINTENANCE__..,Pe,_P_3=_ 
sc. oo,  o,O{o  ,v.C o,TEs 
Oilpivotpoints 
0Cleanshredder_ 
a. 
Checkengineoil 
,,,Changeengineoil
						

							  
Ifnecessary,replacepaperfilter(donotattempt 
toclean).Installnewfilteronbase. 
Slidepre-cleaneroverfilter. 
Installcoverandwingnut. 
Tightenwingnutsecurely. 
CleanEngine 
Cleanengineperiodically.Removedirtand 
debriswithaclothorbrush. 
Frequentlyremovegrassclippings,dirtand 
debrisfromcoolingfins,airintakescreenand 
leversandlinkage.Seefigure14.Thiswillhelp 
ensureadequatecoolingandcorrectengine 
speed. 
Cleancooling 
Figure14 
Yearlyorevery25hours,whicheveroccursfirst, 
removetheblowerhousingandcleantheareas 
showninfigure14toavoidoverspeeding, 
overheatingandenginedamage.Cleanmore 
oftenifnecessary. 
NOTE:Cleaningwithaforcefulsprayofwaterisnot 
recommendedaswatercouldcontaminatethefuel 
system. 
WARNING:Temperatureofmufflerand  nearbyareasmayexceed150°F(65°C). 
Avoidtheseareas, 
SparkPlug 
Cleanthesparkplugandresetthegapto.030 
atleastonceaseasonorevery50hoursof 
operation.Seefigure15.Sparkplug 
replacementisrecommendedatthestartof 
eachseason.Refertoenginepartslistfor 
correctsparkplugtype. Feeler( 
Plug 
Figure15 
NOTE:Donotsandblastsparkplug.Sparkplug 
shouldbecleanedbyscrapingorwirebrushingand 
washingwithacommercialsolvent. 
Muffler 
A WARNING:Donotoperatethechipper- 
shredderwithoutamuffler,ortamperwith 
theexhaustsystem.Damagedmufflersor 
sparkarresterscouldcreateafirehazard. 
Inspectperiodically,andreplaceifnecessary.If 
yourengineisequippedwithasparkarrester 
screenassembly,removeevery50hoursfor 
cleaningandinspection.Replaceifdamaged. 
& WARNING:Alwaysstopengine, 
disconnectsparkplugwire,andmoveit 
awayfromsparkplugbeforeperformingany 
adjustmentsorrepairs. 
LUBRICATION 
Lubricatethepivotpointsonthereleasebar,hopper 
assembly,chutedeflectorandchipperchuteoncea 
seasonusingalightoil.Seefigure16 
Figure16:LubricationChart 
13  
						

							  
14  
						

							  
REMOVINGTHEFLAILSCREEN 
Ifthedischargeareabecomesclogged,removethe 
flailscreenandcleanareaasfollows. 
Stopengine,makecertainthechipper- 
shredderhascometoacompletestopand 
disconnectsparkplugwirefromthesparkplug 
beforeuncloggingthechute. 
Removethetwohandknobsoneachsideof 
thedischargechute(alsocalledthechute 
deflector). 
Liftthedischargechuteup,andkeepitoutof 
theway. 
Removetwohairpinclipsfromtheclevispins 
whichextendthroughthehousing.Removethe 
clevispins,Seefigure17. 
Pulltheflailscreenfrominsidethehousing. 
Seefigure17. 
Cleanthescreenbyscrapingorwashingwith 
water. 
Reinstallthescreen. 
Putthedischargechutebacktoitsoriginal 
positionandtightenthehandknobs. 
NOTE:Becertaintoreassembletheflailscreenwith 
thecurvedsidedown. 
ChuteDeflector 
ChipperChute Removetheflailscreenasinstructedinprevious 
section. 
Usinga1/2wrench,removethechipperchute 
byremovingthreehexnutsandwashers.See 
figure17, 
Usinga7/16wrench,removethebrace 
(holdingthechutetotheframe)byremovingthe 
hexbolts. 
NOTE:Whenre-assembling,thecuppedwasher 
goesontheslottowardthebottomofthechipper 
chutewiththecuppedsideagainstthechute. 
Rotatetheimpellerassemblybyhanduntilyou 
locateoneofthetwochipperbladesinthe 
chipperchuteopening.Removetheblade,using 
a3/16allenwrenchontheoutsideoftheblade 
and1/2wrenchontheimpellerassembly 
(insidethehousing).Seefigure18. 
SlotBlade 
HexNut, 
Washer 
HandKnobs 
Figure17 
SHARPENINGORREPLACING 
THEBLADES 
ChipperBlades 
Disconnectsparkplugwireandmoveitaway 
fromsparkplug. Figure18 
Removetheotherbladeinthesamemanner. 
Replaceorsharpenblades. 
Ifsharpening,makecertaintoremoveanequal 
amountfromeachblade. 
Reassembleinreverseorder.Makecertain 
bladesarereassembledwiththesharpedge 
facingthedirectionshowninfigure18(sharp 
edgeisassembledtowardtheslottedopeningat 
thebottom). 
Torqueboltsandnutsto250-350inch-pounds. 
ShreddingBlade 
Theshreddingblademayberemovedforsharpening 
orreplacementasfollows. 
15  
						

							  
Disconnectsparkplugwireandmoveitaway 
fromsparkplug. 
Lowerthehopperassembly.Blockupthe 
housing.Seefigure19. 
WeldBolt 
Allen 
Screw 
Pipe causedamagetotheunit.Thebladecanbetasted 
forbalancebybalancingitonaroundshaft 
screwddverornail.Removemetalfromtheheavy 
sideuntilitisbalancedevenly.Seefigure20. 
Whenreassemblingtheblade,tightencenter 
bolttobetween550and650inch-poundsand 
thetwoouterboltstobetween250and350inch- 
pounds,orlackingtorquewrench,tighten 
securely. 
1.insertscrewdriverthroughhole 
d/ 
2.Bladeshouldbeparalleltoground 
Screv_ 
Driver\Blade 
iI-- 
Ground 
TorqueWrench 
Figure20 
Figure19 
Removethesixhexlocknutsandlockwashers 
fromthehousingweldboltsusinga1/2wrench. 
Separatethechipper-shredderintotwohalves. 
Removetheback-upplate. 
NOTE:Whenreassembling,makecertainthe 
embossedtabfacesinwardtowardstheimpeller,and 
openingontheback-upplateistowardthebottomof 
theunit. 
Removethetwohandknobsandcupped 
washerswhichsecurethechutedeflector.Raise 
thechutedeflector. 
Inserta1/2or3/4diameterpipethroughthe 
flailscreenintotheimpellertokeepitfrom 
turning,orremovetheflailscreenandinserta 
pieceofwood(2x4)intothechuteopening. 
Removethetwooutsidescrewsontheblade, 
usinga3/16allenwrenchanda1/2wrench. 
Removethebladebyremovingthecenterbolt, 
lockwasherandfiatwasher. 
,_WARNING:Usecautionwhenremoving  thebladetoavoidcontactingtheweldbolts 
onthehousing. 
Whensharpeningtheblade,followtheoriginal 
angleofgrindasaguide.Itisextremely 
importantthateachcuttingedgereceivesan 
equatamountofgrindingtopreventan 
unbalancedblade. 
Anunbalancedbladewillcauseexcessive 
vibrationwhenrotatingathighspeedsandmay ADJUSTINGCARBURETOR 
A WARNING:Ifanyadjustmentsaremadeto 
theenginewhiletheengineisrunning(e.g. 
carburetor),keepclearofallmovingparts. 
Becarefulofheatedsurfacesandmuffler. 
Thecarburetorhasbeenpre-setatthefactoryand 
shouldnotrequireadjustment.However,ifyour 
enginedoesnotoperateproperlyduetosuspected 
carburetorproblems,takeyourchipper-shredderto 
yournearestSEARSservicecenter. 
ENGINESPEED 
Theenginespeedonyourchipper-shredderhasbeen 
setatthefactory.Donotattempttoincreaseengine 
speedoritmayresultinpersonalinjury.Ifyoubelieve 
theengineisrunningtoofastortooslow,takeyour 
chipper-shreddertothenearestSEARSservice 
centerforrepairandadjustment. 
TIRES 
Recommendedoperatingtirepressureis24p.s.i. 
(sidewalloftiremaygivetiremanufacturers 
recommendedpressure).Equaltirepressureshould 
bemaintainedonbothtires. 
WARNING:Excessivepressurewhenseating  beadsmaycausetire/rimassemblytoburstwith 
forcesufficienttocauseseriousinjury. 
16  
						

							  
Prepareyourchipper-shredderforstorageattheend 
oftheseasonoriftheunitwillnotbeusedfor30days 
ormore. 
A WARNING:Neverstoremachinewithfuel 
inthefueltankinsideofbuildingwhere 
fumesmayreachanopenflameorspark, 
orwhereignitionsourcesarepresentsuch 
ashotwaterendspaceheaters,furnaces, 
clothesdryers,stoves,electricmotors,etc. 
Ayearlycheck-upbyyourlocalSearsservicecenter 
isagoodwaytomakecertainyourchipper-shredder 
willprovidemaximumperformanceforthenext 
season. 
CHIPPER-SHREDDER 
Cleanthechipper-shredderthoroughly. 
Wipeunitwithanoiledragtopreventrust(usea 
lightoilorsilicone). 
ENGINE 
IMPORTANT;Itisimportanttopreventgumdeposits 
fromforminginessentialfuelsystempartssuchas 
carburetor,fuelfilter,fuelhose,ortankduring 
storage.Also,experienceindicatesthatalcohol 
blendedfuels(calledgasoholorusingethanolor 
methanol)canattractmoisturewhichleadsto 
separationandformationofacidsduringstorage. 
Acidicgascandamagethefuelsystemofanengine 
whileinstorage. 
Drainthefueltank. 
Starttheengineandletitrununtilthefuellines 
andcarburetorareempty. 
Draincarburetorbypressingupwardonbowl 
drainwhichislocatedbelowthecarburetor. 
Neveruseengineorcarburetorcleaner productsinthefueltankorpermanentdamage 
mayoccur. 
Usefreshfuelnextseason. 
NOTE:Fuelstabilizerisanacceptablealternativein 
minimizingtheformationoffuelgumdepositsduring 
storage. 
Addstabilizertogasolineinfueltankorstorage 
container. 
Alwaysfollowthemixratiofoundonstabilizer 
container. 
Runengineatleast10minutesafteradding 
stabilizertoallowthestabilizertoreachthe 
carburetor. 
Donotdrainthegastankandcarburetorifusing 
fuelstabilizer.Drainalltheoilfromthe 
crankcase(thisshouldbedoneaftertheengine 
hasbeenoperatedandisstillwarm)andrefill 
thecrankcasewithfreshoil. 
Ifyouhavedrainedthefueltank,protectthe 
insideoftheengineasfollows. 
Removesparkplug,pourapproximately1/2 
ounce(approximatelyonetablespoon)ofengine 
oilintocylinderandcrankslowlytodistributeoil. 
Replacesparkplug. 
OTHER 
Donotstoregasolinefromoneseasonto 
another. 
Replaceyourgasolinecanifyourcanstartsto 
rust.Rustand/ordirtinyourgasolinewillcause 
problems.Storeunitinaclean,dryarea.Donot 
storenexttocorrosivematerials,suchas 
fertilizer. 
NOTE;ffstoringinanunventilatedormetalstorage 
shed,becertaintorustprooftheequipmentbycoating 
withalightoilorsilicone. 
17  
						

							  
PROBLEMPOSSIBLECAUSECORRECTIVEACTION 
Enginefailstostart1.Fueltankempty,orstalefuel1.Filltankwithclean,freshfuel 
2.Sparkplugwiredisconnected2.Connectwiretosparkplug. 
3.Faultysparkplug3.Clean,adjustgaporreplace. 
4.Throttlecontrolnotincorrect4.MovethrottlecontroltoFAST 
positionposition 
Lossofpower;operationerratic1.Sparkplugwireloose 
Engineoverheats 
Toomuchvibration 
Unitdoesnotdischarge 2.UnitrunningonChoke 
3.Blockedfuellineorstalefuel 
4.Waterordirtinfuelsystem 
5.Carburetoroutofadjustment 
6.Dirtyaircleaner 
1.Carburetornotadjustedproperly 
2.Engineoillevellow 
1.Loosepartsordamaged 
impeller 
1.Dischargechuteclogged 
2.Foreignobjectlodgedin 
impeller 1.Connectandtightensparkplug 
wire 
2.MovechokelevertoOFF 
position 
3.Cleanfuelline;filltankwith 
clean,freshgasoline. 
4.Disconnectfuellineat 
carburetortodrainfueltank. 
Refillwithfreshfuel. 
5.ContactyourSEARSservice 
center. 
6.Serviceaircleaner. 
1. 
2. 
1. ContactyourSEARSservice 
center 
Fillcrankcasewithproperoil 
Stopengineimmediatelyand 
disconnectsparkplugwire. 
Tightenallboltsandnuts.Make 
allnecessaryrepairs.Ifvibration 
continues,haveunitservicedby 
eSEARSservicecenter. 
1.Stopengineimmediatelyand 
disconnectsparkplugwire. 
cleanflailscreenandinsideof 
blowerhousing. 
2.Stopengineimmediatelyand 
disconnectsparkplugwire. 
Removelodgedobject. 
Rateofdischargeslows1.Shreddingbladeand/orchipping1.Sharpenorreplaceblade(s) 
considerablyorcompositionofbladedull 
dischargedmaterialchanges 
Forrepairsbeyondtheminoradjustments 
listedabove,pleasecontactyournearest 
SEARSservicecenter. 
18  
						

							  
SEARSCRAFTSMAN8.5H.P.CHIPPER-SHREDDERMODEL247.775880 
6 
29 
12 21 5 
1418 
97 33 13 
74 52 
56 
85 
88 63 
65 
807991 
19  
						

							  
KeyPartNo 
No 
--770-1228A 
111480 
2681-0118 
3681-0144 
4710-0542 
710-0607 
710-3256 
7712-0429 
8712-3027 
9714-0104 
10715-0129 
11726-0106 
12726-0135 
13728-0175 
14732-0546 
15732-0629 
16735-0127 
17735-0651 
18736-0119 
19738-0137A 
20738-0946 
21747-0531A 
22747-0747 
23747-1124 
124747-1125 
,25781-0492A 
126781-0633 
27781-0698 
28781-0715 
29781-0752 
30781-0754-0689 
31781-0755-0689 
32738-0813 
33731-1899 
37710-0751 
38736-0173 
39712-3027 
40749-1004 
41710-0106 
43712-3010 
44736-0242 
45735-0249 
48681-0068-0689 Description 
OwnersManual 
StopWasher 
InletGuideAssembly 
ArmBracketAssembly 
HexFlangeBolt:5/16-18x 
8.375(Gr.5) 
HexWasherHeadSelf-Tap- 
pingScrew:5/16-18x0.5 
Button-HeadScrew1/4-20x 
0.5 
LockNut:5/16-18 
HexFlangeLockNut:1/4-20 
InternalCotterPin 
SpiralPin 
CapNut 
SpeedCapNut 
PopRivet 
TorsionSpring 
HopperDoorSpring 
RubberWasher 
HopperFlap 
LockWasher 
Shdr.Scr:.340x.285x1/4-20 
Shdr.Scr:.56x.165x5/16-18 
Rel.Rod:5/16dia. 
HopperDoorRod 
FlapRetainingRod 
FlapRetainingBail 
HopperPivotDoor 
ChuteFlapStrip 
HopperLockBracket 
ShredderPlate 
FlapMountingBracket 
UpperHopper 
LowerHopper 
ShredderAxle 
ChipperChute 
HexBolt1/4-20x.625 
FlatWasher.28I.d.x.74O.d. 
FlangedLockNut 
ChipperChuteSupport 
HexScr.1/4-20x.625(Gr.2) 
HexNut5/16-18Thd.(Gr.5) 
BellWasher.345I.d.x.88 
ShredderChuteFlap 
ChipperChuteAssembly KeyPartNo 
No 
49726-0214 
50734-0255 
51750-0793 
52712-3027 
53714-0149B 
55720-0170 
56710-0805 
57781-0510B 
58736-0366 
59734-1845 
61736-0170 
63681-0117-0689 
65710-0157 
67 
68781-0490 
69712-0411 
70736-0119 
71681-0030 
72742-0571 
73781-0457-0637 
74681-0094 
75781-0735 
76715-0166 
78710-1054 
79710-3008 
80681-0004A-0689 
82710-0825 
83726-0211 
85711-0835 
87719-0329 
88711-0833B 
89710-1254 
90736-0217 
91736-0247 
92732-0306 
937360117 
94714-0104 
95711-1304 
96736-0160 
97734,-1797 
98726-0299 
99747--0982 
100764-0501 Description 
PushCap5/8dia, 
AirVaIve 
ChuteHingeSpacer 
HexCtr.LockNut1/4-20Thd. 
InternalCotterPin 
HandKnob 
HexBolt5/18-18x1.5 
ShredderFrame 
FlatWasher1,12x,64x.120 
WheelAssembly 
SpecialLockWasher 
FlailHousingAssy,--Inner 
HexBolt5/16-24x,75Lg, 
Engine,Tecumseh143.988503 
ChipperBlade 
HexTopLockNut5/18-24 
(Gr.5) 
LockWasher5/16I.d. 
impellerassembly 
ShredderBlade 
ShredderScreen 
DischargeChuteAssembly 
RetainingClip 
SpringRollPin 
FlatHeadScr.5/16-24x.75 
HexBolt5/16-18x.75(Gr.5) 
FlailHousingAssy.--Outer 
HexBolt1/4-20x3.75 
UNut5/16-18 
ClevisPin 
FlailBlade 
ClevisPin 
HexPatchBolt3/8-24x2.25 
(Gr.8) 
LockWasher3/8 
FlatWasher.406I.d.x1.25 
CompressionSpring 
FlatWasher 
InternalCotterPin 
AxleShaft 
FlatWasher 
CompleteWheel:Grey 
PushCap 
LockRod 
ShredderBag 
2O