Craftsman 90 Snow Manual
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KNOWYOURSNOWTHROWER READTHISOWNERSMANUALANDSAFETYRULESBEFOREOPERATING YOURSNOWTHROWER.ComparetheillustrationswithyourSNOWTHROWER tofamiliarizeyourselfwiththelocationofvariouscontrolsandadjustments.Save thismanualforfuturereference. Auger ElectricDriveLever Start(righthand) Button Primer nitionBuSwitch --TractionDriveLever (lefthand) ,Remote ChuteControl LeverCrank Assembly -ChuteDeflector Discharge Chute Choke RecoilHeight ControlThrottleStarterAdjust ControlHandleSkid Figure10 AugerDriveLever-Startsandstops theaugerandimpeller(snowgathering andthrowing) TractionDriveLever-Propelsthe snowthrowerforwardandinreverse. SpeedShifterLever-Selectsthe speedofthesnowthrower(6speedsfor- wardand2speedsreverse). CrankAssembly-Changesthedirection ofsnowthrowingthroughthedischargechute. ChuteDeflector-Changesthedistance thesnowisthrown. DischargeChute-Changestheheight anddirectionthesnowisthrown. HeightAdjustSkid-Adjuststheground clearanceoftheaugerhousing. ignitionKey-Mustbeinsertedtostart theengine. RecoilStarterHandle-Startstheen- ginemanually. F-001088J 11 ChokeControl-Usedtostartacold engine. PrimerButton-Injectsfueldirectlyinto thecarburetormanifoldforfaststartsin coldweather. RemoteChuteControlLever-Push forwardtodischargesnowhighandfar. Pullremoteleverbacktodischargesnow down. ThrottleControl-Controlstheengine speed. ElectricStartButton-(ifsoequipped) Usedtostarttheengineusingthe120Velec- tricstarter. ShearPin-Shearpinsaredesignedto break(toprotectthemachine)ifanob- iectbecomeslodgedintheaguerhous- ing. Toolbox-spareshearpinsandspacers arelocatedintoolbox.
Theoperationofanysnowthrowercan resultinforeignobjectsbeingthrown intotheeyes,whichcanresultinse- vereeyedamage.Alwayswearsafety glassesoreyeshieldswhileoperating thesnowthrower. Werecommendstandardsafety glassesorawidevisionsafetymaskfor overyourglasses. _ARNING:ReadOwners Manualbeforeoperating machine.Neverdirectdis- chargetowardbystandersstopthe enginebeforeuncloggingdischarge chuteoraugerhousingandbefore leavingthemachine. TOSTOPYOUR SNOWTHROWER 1.Tostopthrowingsnow,releasethe au_3erdrivelever.SeeFigure10. 2.Tostopthewheels,releasethe tractiondrivelever. 3.Tostoptheengine,pushthe throttlecontrollevertooffandpull outtheignitionkey. TOCONTROLSNOWDISCHARGE 1.Turnthechutecontrolrodtosetthe directionofthesnowthrowing. 2.Loosenthewingknobonthechute deflectorandmovethedeflectorto setthedistance.Movethedeflector (Up)formoredistance,(Down)for lessdistance.Thentightenthe wingknob(SeeFigure11). Knob thespeedyoudesirebymovingthe speedshifterleverleftintotheap- propriatenotchesontheshiftlever plate: Speeds1,2-Wet,Heavy Speed3-Light Speed4-VeryLight Speed5,6-Transportonly 2.Engagethetractiondrivelever(left hand).Asthesnowthrowerstarts tomove,maintainafirmholdonthe handles,andguidethesnowthrow- eralongtheclearingpath.Donot attempttopushthesnowthrower. 3.Tomovethesnowthrowerback- ward,movethespeedshifterlever rightintofirstorsecondreverseand engagethetractiondrivelever(left hand). IMPORTANT:Donotmovethespeed shifterleverwhilethetractionlever isdown, TOTHROWSNOW 1,Pushdowntheaugerdriverlever (righthand). 2.Releasetostopthrowingsnow. TOUSEWHEELLOCKOUTPIN . Thelefthandwheelissecuredto theaxlewithaklickpin.Thisunit wasshippedwiththisklickpininthe lockedposition(throughwheel hole),SeeFigure12. KlickPin Figure11 HOWTOMOVEFORWARDAND BACKWARD 1.Toshift,releasethetractiondrive lever(lefthand)andmovethe speedshifterlevertothespeedyou desire.Groundspeedisdeter- minedbysnowconditions.Select F--O01088J Locked Position 12 2-WheelDrive Figure12 . Foreaseofmaneuverabilityinlight snowconditions,disconnectthe klickpinfromthewheellocked positionandpushintothesingle wheeldriveposition(unlockedaxle holeonly).SeeFigure13.
KlickPin Unlocked Position SingleWheelDrive Figure13 NOTE:Makesurethattheklickpinis inthesinglewheeldrivepositionofthe axleonlyandnotthroughthelocked position. BEFORESTARTINGTHEENGINE , Beforeyouserviceorstarttheen- gine,familiarizeyourselfwiththe snowthrower.Besureyouunder- standthefunctionandlocationofall control_. . Checkthetensionofclutchcable beforestartingtheengine.SeeTo AdjustTheControlCablepara- graphintheService&Adjust- mentssectionofthismanual. . 4. Besurethatallfastenersaretight. Makesuretheheightadjustskids areproperlyadjusted.SeeToAd- justSkidHeightparagraphinthe Service&Adjustmentssectionof thismanual. 5.Checktirepressure(14-17 pounds).Donotexceedmaximum amountofpressure. CHECKTHEOIL: NOTE:Theenginewasshippedfrom thefactoryfilledwithoil.Checkthelev- eloftheoil.Addoilasneeded. 1.Makesuretheunitislevel. NOTE:Donotcheckthelevelofthe oilwhiletheengineruns. 2.Removetheoilfillcap/dipstick. Checktheoil. 3.ifnecessary,addoiluntiltheoil reachestheFULLmarkontheoilfill cap/dipstick(seeFigure14).Donot addtoomuchoil. F-O01088J OilFillC_q,o/Dipstick NOTE:Oillevel mustbebetween fullandAddmark Figure14 4.Tightenthefillcap/dipsticksecurely eachtimeyouchecktheoillevel. NOTE:Forextremecoldoperating conditionsof0°Fandbelow,useapar- tialsynthetic0W30motoroilforeasier starting. NOTE:S.A.E.5W30motoroilmaybe usedtomakestartingeasierinareas wheretemperatureisconsistently20°F. orlower. FILLGAS: NOTICE:ENGINESWHICHARE CERTIFIEDTOCOMPLYWITHCAL- IFORNIAANDUSEPAEMISSION REGULATIONSFORULGEENGINES: Arecertifiedtooperateonregularun- leadedgasoline.Includethefollowing emissioncontrolsystem(s):EM,TWC (ifsoequipped).Includeanyuserad- justablefeatures-thereforenootherad- justmentsareneeded. ,_WARNING:Experiencesin- dicatesthatalcoholblended fuels(calledgasoholor thoseusingethanolormethanol) canattractmoisturewhichleadsto separationandformationofacids duringstorage,Acidicgascandam- agethefuelsystemofanengine whileinstorage. NOTE:Toavoidengineproblems,the fuelsystemmustbeemptiedbefore storagefor30daysorlonger.Startthe engineandletitrununtilthefuellines andcarburetorareempty.Usethecar- buretorbowldraintoemptyresidual gasolinefromthefloatchamber.Use freshfuelnextseason.SeetheStor- agesectioninthismanualforadditional information. 13
Neveruseengineorcarburetorcleaner productsinthefueltankorpermanent damagemayoccur. 1.Fillthefueltankonlywithafresh, clean,unleadedregular,unleaded premium,orreformulatedautomo- tivegasoline.DONOTuseleaded gasoline.Makesurethatthecon- taineryoupourthegasolinefromis cleanandfreefromrustorotherfor- eignparticles.Neverusegasoline thatmaybestalefromlongperiods ofstorageinthecontainer. AARNING:Gasolineisflam- mable.Alwaysusecaution whenhandlingorstoring gasoline. Donotfillfueltankwhilesnow throwerisrunning,whenitishot,or when,snowthrowerisinanen- closedarea. Keepawayfromopenflameoran electricalsparkanddonotsmoke whilefillingthefueltank. Neverfillthetankcompletely.Fill thetanktowithin1/4-1/2fromthe toptoprovidespaceforexpansion offuel. Alwaysfillfueltankoutdoorsand useafunnelorspouttoprevent spilling. Makesuretowipeupanyspilled fuelbeforestatingtheengine. Storegasolineinaclean,approved containerandkeepthecapinplace onthecontainer. TOSTOPENGINE Tostopengine,movethethrottlecon- trollevertoSTOPpositionandre- movekey.Keepthekeyinasafe place.Theenginewillnotstartwithout thekey. TOSTARTENGINE (electricstarter,ifequipped) Besurethattheenginehassufficient oil.Thesnowthrowerengineis equippedwitha120voltA.C.electric starterandrecoilstarter.Beforestart- F-001088,.I ingtheengine,becertainthatyouhave readthefollowinginformation. AARNING:Thestaderis equippedwithathree-wire powercordandplugandis designedtooperateon120voltAC householdcurrent.Itmustbeproper- lygroundedatalltimestoavoidthe possibilityofelectricalshockwhich maybeinjurioustooperator.Follow allinstructionscarefullyassetforth intheToStartEnginesection.De- terminethatyourhousewiringisa three-wiregroundedsystem.Aska licensedelectricianifyouarenot sure.Ifyourhousewiresystemis notathree-wiresystem,donotuse thiselectricstarterunderanycondi- tions.Ifyoursystemisgrounded andathree-holereceptacleisnot availableatthepointyourstarterwill normallybeused,oneshouldbe installedbyalicensedelectrician. whenconnecting120voltACPower Cord,alwaysconnectthecordto theSwitchBoxontheenginefirst, thenplugtheotherendintothe three-holegroundedreceptacle. WhendisconnectingPowercord, alwaysunplugtheendinthethree- holegroundedreceptaclefirst. COLDSTART 1.Besureaugerdriveandtraction driveleversareinthedisengaged (RELEASED)position. 2.MovethrottlecontroltoFASTposi- tion. 3.Removethekeysformtheplastic bag.Insertonekeyintoignition slot.Makesureitsnapsintoplace. Donotturnkey.Keepthesecond keyinasafeplace. 4.Rotatechokeknobclockwisetothe chokeONposition. 5.Connectthepowercordtothe switchboxontheengine. 6.Plugotherendofpowercordintoa three-hole,grounded120VOLT,AC receptacle.(SeeWARNINGinthis section). 14
. Pushtheprimerbuttonwhilecov- eringtheventholeasfollows:Re- movefingerfromprimerbutton betweenprimes. Donotprimeiftemperatureabove 50°F(10°C). Pushtwotimeiftemperatureis50° F(10°C)to15°F(-10°C). Pushfourtimesiftemperatureis below15°F(-10°C). 8.Pushdownonthestarterbutton untiltheenginestarts.Donotcrank formorethan10secondsatatime. Thiselectricstarteristhermallypro- tected.Ifoverheateditwillstopau- tomaticallyandcanberestarted onlywhenithascooledtoasafe temperature(awaitofabout5to10 minutesisrequired). 9.Whentheenginestarts,releasethe starterbuttonandmovechokele- verto1/2chokeposition.When enginerunssmoothly,movechoke levertoNoChokePosition. 10.Disconnectpowercordfromrecep- tacle,first,andthenfromswitch box. NOTE:Allowtheenginetowarmupfor severalminutesbeforeblowingsnowin temperaturesbelow0°F. 11.RunengineatfullthrottleFAST whenthrowingsnow. WARMSTART Ifrestartingawarmengineafterashort shutdown,leavechokeatOFFanddo notpushtheprimerbutton.Iftheen- ginefailstostart,followtheColdStart instructions. TOSTARTENGINE (recoilstarter) Besurethattheenginehassufficient oil.Thesnowthrowerengineis equippedwitharecoilstarter.Before startingtheengine,becertainthatyou havereadthefollowinginformation. F-001088J COLDSTART 1.Besureaugerdriveandtraction driveleversareinthedisengaged (RELEASED)position. 2.MovethrottlecontroltoFASTposi- tion. 3.Removethekeysformtheplastic bag.Insertonekeyintoignition slot.Makesureitsnapsintoplace. Donotturnkey.Keepthesecond keyinasafeplace. 4.Rotatechokeknobclockwisetothe chokeONposition. 5.Pushtheprimerbuttonwhilecov- eringtheventholeasfollows:Re- movefingerfromprimerbutton betweenprimes. Donotprimeiftemperatureabove 50°F(10°C). Pushtwotimeiftemperatureis50° F(10°C)to15°F(-10°C). Pushfourtimesiftemperatureis below15°F(-10°C). 6.Pullthestarterhandlerapidly.Do notallowthehandletosnapback, butallowittorewindslowlywhile keepingafirmholdonthestarter handle. 7.Astheenginewarmsup,move chokeleverto1/2chokeposition. Whenenginerunssmoothly,move chokelevertoNoChokePosi- tion. NOTE:Allowtheenginetowarmupfor severalminutesbeforeblowingsnowin temperaturesbelow0°E 8.RunengineatfullthrottleFAST whenthrowingsnow. WARMSTART Ifrestartingawarmengineafterashort shutdown,leavechokeatOFFanddo notpushtheprimerbutton.Iftheen- ginefailstostart,followtheColdStart instructions. FROZENSTARTER Ifthestarterisfrozenandwillnotturn engine: 1.Pullasmuchropeoutofthestarter aspossible. 15
2.Releasethestarterhandleandletit snapbackagainstthestarter. Iftheenginestillfailstostart,repeatthe twopreviousstepsuntiltheengine starts.Thencontinuewiththedirec- tionsforcoldstart. Tohelppreventpossiblefreeze-upof recoilstarterandenginecontrols,pro- ceedasfollowsaftereachsnowremov- aljob. 1.Withtheenginerunning,pullthe starterropehardwithacontinuous fullarmstrokethreeorfourtimes. Pullingofstarterropewillproducea loudclatteringsound.Thisisnot harmfultotheengineorstarter. 2.Withtheenginenotrunning,wipeall snowandmoisturefromthecarbu- retorcoverinareaofcontrollevers. Alsomovethrottlecontrol,choke cofltrot,andstarterhandleseveral times. ,_WARNING:Neverrunen- gineindoorsorinenclosed, poorlyventilatedareas.En- gineexhaustcontainsCARBON MONOXIDE,ANODORLESSAND DEADLYGAS.Keephands,feet, hairandlooseclothingawayfrom anymovingpartsonengineand snowthrower. Thetemperatureofmufflerand nearbyareasmayexceed150°F. Avoidtheseareas. DONOTallowchildrenoryoung teenagerstooperateorbenear snowthrowerwhileitisoperating. _bARNING:Donotattempt toremoveanyitemthatmay becomelodgedinauger withouttakingthefollowingprecau- tions: •Releaseaugerdrivelever. •Movethrottlelevertostopposi- tion. •Remove(donotturn)ignition key. Disconnectsparkplugwire. Donotplaceyourhandsinthe augerordischargechute.Usea prybar. SNOWTHROWINGTIPS 1.Formaximumsnowthrowerefficien- cyinremovingsnow,adjustground speed,NEVERthethrottle.Go slowerindeep,freezingorwet snow.Ifthewheelsslips,reduce forwardspeed.Theengineisde- signedtodelivermaximumperfor- manceatfullthrottleandshouldbe runatthispowersettingatalltimes. 2.Mostefficientsnowthrowingisac- complishedwhenthesnowisre- movedimmediatelyafteriffalls. 3.Forcompletesnowremoval,slightly overlapeachpathpreviouslytaken. 4.Thesnowshouldbedischarged downwindwheneverpossible. 5.Fornormalusage,settheskidsso thatthescraperbaris1/8above theskids.Forextremelyhard- packedsnowsurfaces,adjustthe skidsupwardsothatthescraper bartouchestheground. 6.Ongravelorcrushedrocksurfaces, settheskidsat1-1/4belowthe scraperbar.SeeToAdjustSkid HeightparagraphintheService& Adjustmentssectionofthismanu- al.Rocksandgravelmustnotbe pickedupandthrownbythema- chine. . . 9. Afterthesnowthrowingjobhas beencompleted,allowtheengineto idleforafewminutes,whichwill meltsnowandaccumulatediceoff theengine. Cleanthesnowthrowerthoroughly aftereachuse. Removeiceandsnowaccumulation andalldebrisfromtheentiresnow thrower,andflushwithwater(ifpos- sible)toremoveallsaltorother chemicals.Wipesnowthrowerdry. F-001088J16
CUSTOMERRESPONSIBILITIES SERVICERECORDS FillindatesasyouBefore completeregularEach service.UseOften CheckEngineOilLevel !ChangeEngineOil ]]ghtenAllScrewsand_._ Nuts CheckSparkPlug LubncateAllPivot Points EveryEveryEvery 51025EachBeforeSERVICE HoursHoursHoursSeasonStorageDATES ,j LubricateDiscDrive PlateZerk (SeeMaintenance) CheckFuel DrainFuel CheckCable Adjustment (SeeCableAdjustment) AdjustDriveBelt GENERALRECOMMENDATIONS Thewarrantyonthissnowthrower doesnotcoveritemsthathavebeen subjectedtooperatorabuseornegli- gence.Toreceivefullvaluefromthe warranty,theoperatormustmaintain thesnowthrowerasinstructedinthis manual. Someadjustmentswillneedtobe madeperiodicallytoproperlymaintain yoursnowthrower. AlladjustmentsintheServiceandAd- justmentssectionofthismanual shouldbecheckedatleastonceeach season. AFTEREACHUSE •Checkforanylooseordamaged parts. •Tightenanyloosefasteners. •Checkandmaintaintheauger. •Checkcontrolstomakesurethey arefunctioningpropedy. F-001088J •Ifanypartsarewornordamaged, replaceimmediately. LUBRICATIONCHART Lubricate DiscDrive PlateZerk WithaHi TempEP.. Moly Grease. 17 Figure15
PRODUCTSPECIFICATIONS HORSEPOWER9HP DISPLACEMENT19.34cu.in. GASOLINE4quarts CAPACITY(unleaded) OILCAPACITY5W30 20ozcapacity) ;PARKPLUG:ChampionRJ19LM (Gap.030in.)or equivalent VALVECLEARANCE:Intake:.010In. Exhaust:.010In. SNOWTHROWER ASREQUIRED Thefollowingadjustmentshouldbe preformedmorethanonceeachsea- son. 1.Augerdrivebeltshouldbeadjusted afterthefirst2to4hoursofuse, againaboutmid-seasonandtwice eachseasonthereafter(SeetoAd- justBeltsparagraphintheSer- viceandAdjustmentsection). LUBRICATION-EVERY25HOURS LubricateDiscDrivePlateevery twenty-five(25)hoursandattheendof theseasonand/orbeforestorage. ToLubricate 1.Positionspeedselectorleverinfirst gear. 2.Standthesnowthroweruponthe augerhousingend. 3.Removethebottompanel. 4.Turndiscdriveplateclockwiseby handuntilgreasezerkisclearly visibleatfrontcenter.See Figure16. 5.Placeacoinor(ashimofequal thickness)betweentherubberfric- tionwheelanddiscdriveplateto F-001088J preventrubberfrictionwheelcon- tactingthedrivediscplate. 6.Togreasezerk,useahandgrease gun,lubricatewithaHiTempEP Molygrease.Fillzerkonlyuntil greasebecomesvisiblebelowbear- ingassemblylocatedundergrease zerk.DONOToverfill. CAUTION:DONOTallowgreaseto comeincontractwiththediscdrive plateorfrictionwheelordamagewill result. IMPORTANT:Removecoinanden- surethatagapexistsbetweenfriction wheelanddiscdriveplate. NOTE:Cleanallexcessgreasefound onfrictiondischub. SprocketsHexShaftandSprockets (RequireNo Lubrication Friction Wheel Disc Drive Plate 18 FrictionBearing heelPointatwhich inorShimbegreasevisibleshould ,_GapBetween FrictionWheel C_andDiscDrive Plate GreaseZerk Figure16 LUBRICATION-NOTREQUIRED 1.HexShaftandSprockets-Hex shaftandsprocketsrequirenolu- brication.Allbearingsandbushings arelifetimelubricatedandrequire nomaintenance,SeeFigure16. NOTE:Anygreasingoroilingofthe abovecomponentscancausecontami- nationofthefrictionwheel.Ifthedisc
driveplateorfrictionwheelcomein contactwithgreaseoroil,damageto thefrictionwheelwillresult. Shouldgreaseoroilcomeincontact withthediscdriveplateorfriction wheel,besuretocleantheplateand wheelthoroughly. NOTE:Forstorage,thehexshaftand sprocketsshouldbewipedwith5W30 motoroiltopreventrusting. 2.AugerGearBox-Theaugergear boxislubricatedatthefactoryand shouldnotrequireadditionallubrica- tion.Ifforsomereasonthelubri- cantshouldleakout,haveauger gearcasecheckedbyacompetent repairman. ENGINE LUBRICATION Checkthecrankcaseoillevelbefore startingtheengineandaftereachfive (5)hoursofcontinuoususe.See Figure17.AddS.A.E.5W30motoroil asneeded.Tightenfillcap/dipstickse- curelyeachtimeyouchecktheoillev- el. OilFillCap/Dipstick tf Figure1 7 Changetheoileverytwenty-five(25) hoursoratleastonceayearifthe snowthrowerisnotusedfortwenty- five(25)hours. TO 1. 2_ . 4. CHANGEENGINEOIL Positionthesnowthrowersothat theoildrainplugisatthelowest pointontheengine. Removetheoildrainplugandthe oilfillcap/dipstick.Draintheoil intoasuitablecontainer. NOTE:Theoilwilldrainmorefreely whentheengineiswarm. Afterdrainingalltheoil,reinstallthe oildrainplugsecurely. Filltheenginecrankcasewith S.A.E.5W30motoroil,pouring slowly.DONOTOVERFILL. SPARKPLUG Checkthesparkplugeverytwenty- five(25)hours.Replacethesparkplug iftheelectrodesarepittedorburnedor iftheporcelainiscracked. 1.Makesurethesparkplugisclean. Cleanthesparkplugbycarefully scrapingtheelectrodes(donot sandblastoruseawirebrush). 2.Checkthesparkpluggapwitha feelergaugeandresetgapto0.30 ifnecessary.SeeFigure18. 3.Beforeinstallingthesparkplug, coatthethreadslightlywithoilfor easyremoval.Tightenthespark plugtoatorqueof15foot-pounds. FeelerGauge 0.030 SparkPlug Figure18 F-001088J19
,_WARNING:Alwaysdiscon- nectthesparkplugwireand placeitwhereitcannot makecontactwithsparkplugtopre- ventaccidentalstartingwhenmak- inganyadjustmentsorrepairs. TOADJUSTSKIDHEIGHT Thissnowthrowerisequippedwithtwo heightadjustmentskids,locatedon theoutsideoftheaugerhousing.See Figure19. Theseskidselevatethefrontofthe snowthrower. Mountin_Nuts ,.O AugerHousmgHeightAdjustSkid Figure19 Fornormalhardsurfaces,suchasa paveddrivewayorwalk,adjustthe skidsasfollows. 1.Positionthesnowthroweronalevel surface. 2.Makesurebothtiresareequallyin- flated.Propertirepressureis14to 17PSI.Seesideoftireformaxi- muminflation.Donotexceedside- wallmaximumpressureontire. 3.Placetheextrashearboltssupplied (foundinpartsbag)undereach endofthescraperbarnexttothe adjustableskids. 4.Loosenthemountingnutsthathold theadjustableskids.Tobringthe frontofthesnowthrowerdown, raisetheadjustableskids.Tighten themountingnuts.SeeFigure19. NOTE:Forrockyorunevensurfaces, raisethefrontofthesnowthrowerby movingtheskidsdown. ,_WARNING:Becertainto maintainproperground clearanceforyourparticular areatobecleared.Objectssuchas gravel,rocksorotherdebris,if struckbytheimpeller,maybe thrownwithsufficientforcetocause personalinjury,propertydamageor damagetothesnowthrower. TOADJUSTSCRAPERBAR Afterconsiderableuse,themetalscrap- erbarwillhaveadefinitewearpattern. Thescraperbarinconjunctionwiththe skidsshouldalwaysbeadjustedtoal- low1/8betweenthescraperbarand thesidewalkorareatobecleaned. . 2. Positionthesnowthroweronalevel surface. Makesurebothtiresareequallyin- flated.Propertirepressureis14to 17PSI.Seesideoftireformaxi- muminflation.Donotexceedside- wallmaximumpressureontire. 3.Loosenthecarriageboltsandnuts securingthescraperbartotheau- gerhousing. 4.Adjustthescraperbartotheproper position. 5.Tightenthecarriageboltsandnuts, makingsurethatthescraperbaris parallelwiththeworkingsurface. . Forextendedoperation,thescraper barmaybereversed.Ifthescraper barmustbereplacedduetowear, removethecarriageboltsandnuts andinstallanewscraperbar. F-001088J20