Tennant 255 Series II User manual

r
255 SeriesII
Sweeper/
Scrubber

r
Thismanualisfurnishedwitheach newTENNANTr(Model255 SeriesII).Itprovidesnecessaryoperatingand
preventivemaintenanceinstructions.Readthismanualcompletelyandunderstandthemachinebefore
operatingorservicingit.
Thismanualcoversall machinevariationsandstandardaccessories.Thetabbedinstructionportionofthe
manualconsistsoftheSpecification,Operation,Maintenance,andAppendixsections.Thetabbed parts section
consistsofthe(LowDumpModelParts,Multi-LevelDumpModelParts,Accessories,HydraulicComponents,
andEngineParts sections).ThetabbedCross Referencesectionidentifiesthepagenumbersonwhicheachof
thepartnumberslistedinthemanualcanbefound.
All rightsideandleftsidereferencestothemachinearedetermined byfacingthedirectionof forwardtravel.All
hardwareconsideredtobeofacommon natureorlocallyavailablehasbeenomittedfromtheparts sections.
Beawarethat thismachinemaycontainmetrichardware.Makesureyou use equivalenthardwarewhen
replacementbecomesnecessary.
Thismachinewill provide excellentservice.However,thebestresultswill beobtainedatminimumcostsif:
DThemachineisoperatedwithreasonablecare.
DThemachineismaintainedregularly--- perthemaintenanceinstructionsprovided.
DThemachineismaintainedwithTennantCompanysuppliedorequivalentparts.
Partsandsuppliesmaybeordered byphoneormailfromanyTennantCompanypartsandservicecenter,
distributor,orfromanyoftheTennantCompanysubsidiaries.Beforeorderingpartsorsupplies,besuretohave
yourmachinemodelnumberandserialnumberhandy.Fill out thedatablockbelowforfuturereference.The
telephonenumbers,telexnumbers,mailingaddresses,andlocationsofthoseoutletsarelistedintheCustomer
Documents sectionofthemanual.
MACHINEDATA
Pleasefill outat timeofinstallation.
MachineSerialNumber---
EngineSerialNumber---
SalesRepresentative---
DateofInstallation---
ManualNumber--- MM189
Revision:06
Published:6---90 04631
TrademarkRegisteredin:Austria,Benelux,Denmark,England,France,Germany,Italy,Spain,Switzerland,
UnitedStates,Argentina,Australia,Canada,Japan,Mexico,Sweden,byTENNANTCOMPANY,Minneapolis,
Minnesota,U.S.A.
Acknowledgements:Technicalinformationand/orillustrations supplied byFordMotorCompany;CessnaFluid
PowerDivision;EatonCorporation,HydraulicsDivision.
Copyright1987,1988,1989,1990 TennantCompany,PrintedinU.S.A.

ABOUT THISMANUAL
a
255 SERIESII MM189 (12---89)
ABOUT THIS MANUAL
Themachinemanualthatyoureceivedwithyour
TENNANTmachinecontainsvaluableinformation
about theoperationandmaintenance,and
numerous sectionsfilledwithTENNANTpart
numbersfortherepairofthemachine.Pleaseread
throughthis sectiontitledABOUT THISMANUALto
becomefamiliarwiththecontentsofthemachine
manual,makingtheinformationyouarelookingfor
easiertofind.
Themachinemanualconsistsofseveralsectionsof
referenceinformation,andtheremaindercontain
partnumberinformationfororderingrepairpartsfor
themachine.Eachsection hasashaded barat the
topofthepagewiththenameofthatsection.Justas
this section hasthetitleABOUT THISMANUALon
thetopofeachpage.Thisway youcantell which
sectionyouareinatall times.
REFERENCESECTIONS
Thereferenceinformationsectionsofthemanual
are; GeneralInformation,Specifications,Operation,
Maintenance,andAppendix.
GENERALINFORMATION--- TheGeneralInformation
sectionofthemanualcontainsthesafety
precautions,thelocationofthesafetylabelsonthe
machine,andatableofcontentsofthe entire
manual.TheSafetyPrecautionsareanoverviewof
thesafetymeasurestobeobservedwhenoperating
andmaintainingyourmachine.Thelocationofthe
safetylabels showthemountinglocationofthe
safetylabelsforuseinthereplacementofthelabels.
Thetableofcontentsinthis sectionisalistofall the
tableofcontentsthatappearinthefrontofeach
sectioninthemanual.Thiscanbeusedforeasy
referencetolocateinformationinaparticularsection
ofthemanual.
SPECIFICATIONS--- TheSpecifications sectionofthe
manualcontainsmachinespecificationinformation
usefulintheoperationandmaintenanceofthe
machine.This sectiongivesyouspecification
informationonthe engine,electricmotors,brake
system,hydraulics,fluidcapacities,andmachine
weight tomentionafew.Thesectionalsohasa
illustrationofthetopandsideviewofthemachine
withtheheightandwidthdimensionsdisplayed.
OPERATION--- TheOperationsectionofthemanual
containsinformation neededto operatethemachine.
This sectionwill list thecontrolsandinstrumentson
themachine,overviewthemachineoperation,and
tell you howtotransportandstorethemachine.
MAINTENANCE--- TheMaintenancesectioncontains
informationonthesuggestedmaintenance
proceduresandadjustmentstokeepyourmachine
intopoperatingcondition.Thesectionincludesa
MaintenanceChartlistingthemaintenanceschedule
andtheareasofthemachinetobeaddressed.Each
subjectofmaintenanceiscoveredinmoredetailin
suchareasasLubrication,Hydraulics,Engine,and
ElectricalSystem.
APPENDIX--- TheAppendixcontainshardwareand
hydraulicinformation.Standardhardwaretorques
andidentificationinformationisincluded,plus
hydraulictorquesifyourmachineishydraulically
controlled.
PARTSECTIONS
Theremainingsectionsofthemanualcontainpart
numberinformationfororderingrepairpartsforyour
machine.Themanualcontainspartnumber
informationoneverytypeofmachinemodel
availableinthemodelsizeofyourparticular
machine.Thereforetherewill bepartnumber
informationinyourmanualyouwill notneedtorefer
towhenwantingtoplaceanorder.
Themainthingyou needtoknowaboutyour
machineiswhat typeofmodelisit.Isthemachine
powered byanengineorbatteries?Ifthemachine
hasanengine,isitfueledfromgasoline,LPG,or
gasoline?Ifitisamid-sizedorlargersweeper,isit
multi-levelorlowdump?Forthescrubbers,isit
SRSrorstandard.Determiningthisinformation
aboutyourmachinewill helpguideyouthroughthe
separateparts sectionstofindtherepairpartyou
need.

ABOUT THISMANUAL
255 SERIESII MM189 (12---89)
b
Thesmallerlineofsweeperandscrubbershaveless
complicated partsectionarrangement,andare
easiertofindyourwaythroughtheparts sections.
Thelargermachinescan havequiteavarietyof
modeltypeswhichsignificantlyincreasesthesizeto
themachinemanual.Becauseofthis,onthelarger
machinewemadethefirstpartsection,Section5,a
partsectionwhichcontainspartscommontoall type
ofthemachine.Ifthemachinehasanengine,this
sectioncontainspartsinformationonagasoline
poweredmachine.
Theremainingsectionscontainonlyparts
informationwhichisuniquetothatparticular
machinetype,suchasuniquedieselpartsonthe
machine,oruniqueSRSrparts.Knowingthe
machinemodeltypeyou haveisimportantwhen
searchingforthatpartinformationyou needfor
orderingrepairparts.Startinthatuniquesectionfirst
whenlookingforapart,thengotothefirstparts
section,Section5,ifthepartcan’tbefoundinthe
uniquesection.
MACHINESERIALNUMBERS
Whenadesignchangetakesplacetoamachine,
thechangesareindicatedintheparts sectionswith
machineserialnumbers.Knowtheserialnumberof
yourmachinewhichcanbefoundonthemachine
dataplatemountedonthemachine.Recordthis
numberontheinsidefrontcoverofyourmanual
alongwithyourcustomernumber.
MachinenumberusageisrecordedintheMachine
SerialNumbercolumnofthepartslistsintheparts
sectionsofthemanual.Ifthemachineserialnumber
columnlistszerosontheleftsideofthedash,then
thispartisusedonall machines;suchas(000000---
).
Ifthecolumnlistszerosontheleftofthedashanda
numberontherightofthedash,thenthepartis
usedonmachinesuptoandincludingthatmachine
serialnumber;suchas(00000---002345).
Forpartsthatareusedonmachinesbeginningat
andcontinuingonfromacertainserialnumber,the
columnwouldlistaserialnumberontheleftofthe
dashandhaveblankspacesontherightsideofthe
dash;suchas(002346--- ).Thispartwould be
usedonmachines startingwiththatmachineserial
numberandgreater.
Finally,partscanbeusedonmachineswithserial
numbersinacertainblockofnumbers.Inthis
situationthereisaserialnumberontheleftandright
sideofthedash.Thepartisthen usedonamachine
withaserialnumberstartingat thenumberonthe
leftanduptoandincludingthenumberontheright;
suchas(002346---008900).
PARTSASSEMBLIES
Apartassemblyhaspartswithintheassembly,such
asaparkingbrakeconsistingofothersmallerparts.
Whatpartsarecontainedinapartassemblycanbe
determined byanindentationarrangementinthe
descriptioncolumnofthepartslists.
Hereisanexampleofapartassembly,inthiscase
wewill usetheparkingbrakementioned previously:
Machine
SerialNumberDescriptionQty.
(000000--- )ParkingBrake1
(000000--- )Pin,Roll 1
(000000--- )Link1
(000000--- )Spring,Compression1
(000000--- )Pin,Roll 1
(000000--- )Support1
(000000--- )Lever,Release1
(000000--- )Rod,ParkingBrake1
(000000--- )Washer,0.50”3
Inthisexample,thepartswhosedescriptionsare
indentedundertheparkingbrakeareall partsofthe
parkingbrake.Whenyouordertheparkingbrake
youwill receiveall thepartslistedunderit.Youalso
canorderanyoftheindividualpartslistedunderthe
parkingbrakeifitistheonlypartyou need.

ABOUT THISMANUAL
c
255 SERIESII MM189 (12---89)
SUPPLIERCOMPONENTBREAKDOWNS
TENNANTpurchasescertaincomponentsofthe
machinefromsuppliers.Someofthesecomponents
are engines,hydraulicpumpsandmotors,electric
motors,andsolutionpumps.
Forthosepurchasedcomponentsthatare
repairable,listsofpartsforthemappearinthelater
partoftheparts sections.Thesearethesupplier
breakdowns.The enginebreakdowncontainsboth
supplierandTENNANTpartsnumbersfor repair
parts.Breakdownsforhydraulicandelectrical
componentshaveTENNANTpartnumbersforthe
partsTENNANTsupplies.Theserialnumberslisted
inanyofthepartslistsinthesesectionsisaserial
numberthemanufacturerusestoidentifydesign
changesintheirparticularcomponent.
ORDERINGREPAIRPARTS
Onceyou havelocatedapart to order,thereare
severalthingsyou needtohavetoplacetheorder.
At thebeginningofeachparts sectionisanOrdering
RepairPartspagewhichliststheinformationyouwill
needtoplaceyourorder.Reviewthislistbefore
placingtheorder.

ABOUT THISMANUAL
255 SERIESII MM189 (12---89)
d

GENERALINFORMATION
i
255 SERIESII MM189 (12---89)
SAFETYPRECAUTIONS
Thefollowingsymbolsareusedthroughout this
manualasindicatedintheirdescriptions:
WARNING:Towarnofhazardsorunsafe
practiceswhichcouldresultinsevere
personalinjuryordeath.
FORSAFETY:Toidentifyactionswhichmustbe
followedforsafeoperation.
Thefollowinginformationsignalspotentially
dangerousconditionstotheoperatororequipment.
Readthismanualcarefully.Know whenthese
conditionscanexist.Locateall safetydevicesonthe
machine.Thentakenecessarystepstotrain
machineoperatingpersonnel.Reportmachine
damageorfaultyoperationimmediately.Donotuse
themachineifitisnotinproperoperatingcondition.
FORSAFETY:
1.Donotoperatemachine:
-- Unless trainedandauthorized.
-- Unless operationmanualisreadand
understood.
-- Inflammableorexplosiveareasunless
modifiedforuseinthoseareas.
-- Inareaswithpossiblefallingobjects
unless equippedwithoverheadguard.
2.Beforestartingmachine:
-- Checkforfuel leaks(gasoline,LPG).
-- Makesureall safetydevicesarein
placeandoperateproperly.See
Operationsection.
-- Checkbrakesandsteeringforproper
operation.
3.Whenstartingmachine:
-- Keepfootonbrakeand directional
pedalin neutral.
4.When usingmachine:
-- Goslowongradesandslippery
surfaces.
-- Usecarewhenbackingmachine.
-- Donotcarryridersonmachine.
-- Alwaysfollowsafetyandtrafficrules.
5.Beforeleavingorservicingmachine:
-- Stoponlevelsurface.
-- Setparkingbrake.
-- Turnoff machineandremovekey.
6.Whenservicingmachine:
-- Avoidmovingparts.Donotwearloose
jackets,shirts,orsleeveswhenworking
onmachine.
-- UseTennantCompanysuppliedor
equivalentreplacementparts.
WARNING:Machine emitstoxicgases.
Severerespiratorydamageorasphyxiation
canresult.Provideadequateventilation.Consult
withyour regulatoryagencyforexposurelimits.
Keepengineproperlytuned.
WARNING:Brushthrowsdebris.Severe
personalinjurycanresult.Stopmotor
beforeliftinghopper.
WARNING:Machinecanemitexcessive
noise.Consultwithyour regulatoryagency
forexposurelimits.Hearingloss canresult.Wear
hearingprotection.
WARNING:Machinehopperliftsto108 in
(2745 mm)whenhighdumping.Hoppercan
hitoverheadwiresorobject.Electricalshockor
fallingdebriscanresult.Besureadequate
clearanceisavailablebeforeraisinghopper.
WARNING:Machinecanhavestatic
electricitycharge.Whenpouringfuel,spark
canignitefuelcausingfireorexplosion.Connect
wireattachedtofuelcantomachinetodischarge
sparkbeforepouringfuel.
WARNING:Machinemoveswhen
directionalpedal linkageisoutof
adjustment.Severepersonalinjuryordeathcan
result.Ifmachinecreepswhenthedirectional
pedalisin neutral,adjustpedal linkage.Engage
parkingbrakewhenstopped.
WARNING:Fallinghopper.Engagehopper
supportbarbeforeworkingunderhopper.

GENERALINFORMATION
255 SERIESII MM189 (12---89)
ii
WARNING:Fuelvaporispresentwhen
servicingfuelsystem.Fireorexplosioncan
result.Keepflamesandsparksaway.
WARNING:Hotenginecoolant.Scalding
canresult.Donotopenradiatorcapor
servicecoolingsystemuntilradiatorandengine
iscooltothetouch.
WARNING:Flammablematerialscan
causeanexplosionorfire.Donotuse
flammablematerialsinsolutiontank.
WARNING:Thesolutionandrecoverytanks
mustbe emptyduringscrubattachment
installationandremovaltoavoidpersonalinjury.
WARNING:Machineisunstableonjack.
Jackmachineupatdesignatedlocations
only.Blockmachineupwithjackstands.
WARNING:Machineisunstableonjack.
Blockmachinetiresbeforejackingmachine
up.
WARNING:Leakinghydraulicfluidunder
pressurecanpenetrateskin.Severe
infectionordeathcanresult.Donotusebodyto
locateleak.Usecardboardtolocateleak.
WARNING:Airorwaterunderpressure.
Severe eyeorearinjurycanresult.Wear
eyeandearprotection.
WARNING:LPGfuelisverycold.Frostbite
canresult.Weargloveswhenconnectingor
disconnectingLPGhoses.
WARNING:Batteryacidcauses severe
burns.Avoidcontact.Washimmediately
andgetmedicalattentionifcontactoccurs.
WARNING:Stayclearofhopperliftarms
whentheyareinmotion.

GENERALINFORMATION
iii
255 SERIESII MM189 (12---89)
Thefollowingsafetylabelsaremountedonthe
machineinthelocationsindicated.Ifthese,orany,
labelsbecomedamagedorillegible,install anew
labelinitsplace.
02453
ENGINEFANLABEL-- LOCATEDONENGINE
FANSHROUD.BUMPERCHAINLABEL-- LOCATEDON UNDERSIDEOFBUMPER,LOWDUMPMODEL
ONLY.
NOISELABEL-- LOCATEDONFRONTRIGHTOF
OPERATORCOMPARTMENT.HEAVYBUMPERLABEL-- LOCATEDON UNDERSIDEOFBUMPER,LOWDUMPMODEL
ONLY.

GENERALINFORMATION
255 SERIESII MM189 (12---89)
iv
02453
HOPPERLIFTARMSLABEL-- LOCATEDON
HOPPERLIFTARMS,MULTI-LEVELDUMP
MODELONLY.
EMISIONSLABEL-- LOCATEDONLEFTSIDEOF
OPERATORCOMPARTMENT.
HOPPERSUPPORTBARLABEL-- LOCATEDON
HOPPERSUPPORTBAR.
FORSAFETYLABEL-- LOCATEDONLEFTSIDE
OFOPERATORCOMPARTMENT.

GENERALINFORMATION
v
255 SERIESII MM189 (12---89)
CONTENTS
Page
GENERALINFORMATIONi.....................
SAFETYPRECAUTIONSi...................
SPECIFICATIONS1---1.........................
MACHINESPECIFICATIONS1-3.............
POWERTYPE.1-3......................
POWERTRAIN1-3......................
STEERING1-3.........................
HYDRAULICSYSTEM1-3................
BRAKINGSYSTEM1-4..................
SUSPENSIONSYSTEM1-4..............
SYSTEMFLUIDCAPACITIES1-4.........
GENERALMACHINE
DIMENSIONS/CAPACITIES1-4........
MACHINEWEIGHTS1-4.................
GENERALMACHINEPERFORMANCE1-4.
MACHINEDIMENSIONS1-5................
OPERATION2-1...............................
PREPARATIONFOROPERATION2-3........
AFTERUNLOADINGANDBEFORE
OPERATINGTHEMACHINE:2-3.......
OPERATIONOFCONTROLS2-4............
MACHINECOMPONENTS---
MULTI-LEVELDUMP
MODELSHOWN2-4.................
INSTRUMENTPANELSYMBOLS2-5......
CONTROLSANDINSTRUMENTS2-7.....
BRAKEPEDAL2-8......................
DIRECTIONALPEDAL2-8...............
PARKINGBRAKELEVER2-8.............
OPERATORSEAT2-8...................
SQUEEGEE SWITCH2-8................
WATERVALVESWITCH2-8..............
FUEL LEVELGAUGE2-8................
THROTTLELEVER2-8..................
THROTTLESWITCH2-9.................
HAZARDLIGHTSWITCH2-9.............
DRIVELIGHTS SWITCH2-9..............
ENGINECHOKEKNOB2-9..............
HOPPERDUMPLEVER2-9..............
HOPPERLIFTAND
SIDEBRUSHLEVER2-9..............
MAINBRUSHPOSITIONLEVER2-10......
STEERINGWHEEL2-10..................
MAINBRUSH,VACUUMFANAND
FILTERSHAKERSWITCH2-10.........
MAINBRUSH HEIGHTADJUSTMENT
KNOB2-10...........................
ENGINEHOURMETER2-10..............
Page
ENGINECOOLANT TEMPERATURE
GAUGE2-11........................
ENGINEOILPRESSUREGAUGE2-11.....
BATTERYCONDITIONGAUGE2-11........
CLOGGEDFILTERLAMP2-11.............
IGNITIONSWITCH2-11...................
SIDEBRUSHPOSITIONLEVER2-11.......
HOPPERSUPPORTBAR2-11.............
TOENGAGEHOPPER
SUPPORTBAR2-11................
TODISENGAGEHOPPER
SUPPORTBAR2-12................
SCRUB BRUSHPOSITIONLEVER2-13.....
SOLUTIONFLOWKNOB2-13.............
CIRCUITBREAKERS2-13................
MACHINEOPERATION2-14.................
NORMALSWEEPINGOPERATION2-14....
PRE-STARTCHECKLIST2-14..........
TOSTARTMACHINE2-14.............
TOSWEEP2-15......................
TODUMPHOPPER2-15...............
POSTOPERATIONCHECKLIST---
ENGINEOPERATING2-16..........
TOSTOPMACHINE2-16..............
POSTOPERATIONCHECKLIST---
ENGINESTOPPED2-16............
NORMALSCRUBBINGOPERATION2-16...
PRE-STARTCHECKLIST2-16..........
TOSTARTMACHINE2-17.............
TOSCRUB2-17......................
TODRAINRECOVERYTANKAND
EMPTYDEBRISHOPPER2-18.......
POSTOPERATIONCHECKLIST---
ENGINEOPERATING2-18..........
TOSTOPMACHINE2-19..............
POSTOPERATIONCHECKLIST---
ENGINESTOPPED2-19............
DOUBLESCRUBBINGOPERATION2-19...
OPERATIONONGRADES2-19............
VACUUMWAND2-19....................
TO OPERATEVACUUMWAND2-19.....
HOPPERDOLLY2-21.....................
TOREMOVEHOPPERWITHDOLLY2-21
TOINSTALL HOPPERWITHDOLLY2-22.
SCRUBATTACHMENT2-22...............
TOMOUNTSCRUBATTACHMENT2-22.
TOREMOVESCRUBATTACHMENT2-25
SNOWBLADE2-27......................
TOINSTALL SNOWBLADE2-27........
TO OPERATESNOWBLADE2-28.......
TOREMOVESNOWBLADE2-29.......

GENERALINFORMATION
255 SERIESII MM189 (12---89)
vi
Page
SNOWBROOM2-29.....................
TOINSTALL SNOWBROOM
ASSEMBLY2-29...................
TO OPERATESNOWBROOM2-31......
TOREMOVESNOWBROOM
ASSEMBLY2-32...................
MACHINETROUBLESHOOTING---
SWEEPING2-33......................
MACHINETROUBLESHOOTING---
SCRUBBING2-34.....................
TRANSPORTINGMACHINE2-35.............
PUSHINGORTOWINGMACHINE2-35.....
MACHINEJACKING2-35.................
TOJACKUPMACHINE2-35...........
MACHINETIE-DOWNS2-36...............
MACHINESTORAGE2-37...................
STORINGMACHINE2-37.................
MAINTENANCE3-1............................
RECOMMENDEDFIRST50-HOUR
MACHINEINSPECTION3-3..............
MAINTENANCECHART3-4.................
LUBRICATION3-6.........................
ENGINE3-6............................
REARWHEELSUPPORT3-6.............
STEERING GEAR3-6...................
FRONTWHEELBEARINGS3-6...........
HOPPERLIFTARMPIVOTS3-7..........
HOPPERDOORLATCHES3-7............
SCRUBATTACHMENTLEG
CASTERS3-8.......................
SCRUBATTACHMENT
DEBRISHOPPER3-8.................
HYDRAULICS3-9..........................
HYDRAULICFLUID3-9..................
HYDRAULICFLUIDRESERVOIR3-9......
TODRAINHYDRAULICFLUID
RESERVOIRANDREPLACE
FILTERELEMENT3-10..............
TOFILL HYDRAULIC
FLUIDRESERVOIR3-11............
HYDRAULICPUMPS3-11.................
DIRECTIONALPEDAL3-11...............
TOADJUSTDIRECTIONALPEDAL3-12.
LIFTARMSPEEDLIMITER3-13...........
HYDRAULICFLUIDLEAKS3-13...........
HYDRAULICSCHEMATIC---
LOWDUMPMODEL3-14..............
HYDRAULICSCHEMATIC---
MULTI-LEVELDUMPMODEL3-15......
HYDRAULICSYSTEM
TROUBLESHOOTING3-16.............
HYDRAULIC COMPONENTS
TROUBLESHOOTING3-18.............
Page
ENGINE3-19...............................
ENGINELUBRICATION3-19..............
COOLINGSYSTEM3-19..................
AIRINTAKESYSTEM3-20................
AIRFILTER RESTRICTION
INDICATOR3-20...................
AIRFILTER3-20......................
TOREPLACEAIRFILTERELEMENT3-21
FUELSYSTEM--- GASOLINE3-22.........
FUELFILTER3-22.....................
CARBURETOR3-22...................
FUELSYSTEM--- LPG3-23...............
LPGFUELSYSTEM3-23...............
FUELTANKS3-24.....................
TOCHANGEANLPGFUELTANK3-25. .
FUELFILTERLOCK3-25...............
VAPORIZER-REGULATOR3-25.........
CARBURETOR3-25...................
OILPRESSURESWITCH3-25..........
LPGFUELTROUBLESHOOTING3-26...
GOVERNOR(Formachinesbelow
serialnumber038000)3-27............
TOADJUSTGOVERNOR
(Formachinesbelow
serialnumber038000)3-27..........
GOVERNOR(Formachines serial
number038000 andabove)3-27........
IGNITIONSYSTEM3-28..................
SPARKPLUGS3-28...................
DISTRIBUTOR(Formachines
belowserialnumber038000)3-28....
ENGINEIGNITIONTIMING
(Formachinesbelow
serialnumber038000)3-28..........
TOCHECKANDADJUSTIGNITION
TIMING(Formachinesbelow
serialnumber038000)3-28..........
ENGINEIGNITIONTIMING
(Formachines serialnumber
038000 andabove)3-29............
CYLINDERHEAD3-29....................
CYLINDERHEAD3-29.................
VALVETAPPETCLEARANCE3-30......
CRANKCASEVENTILATIONSYSTEM3-30. .
TUNE-UPCHART--- GASOLINE,LPG3-30. .
ELECTRICALSYSTEM3-31..................
BATTERY...............................
3-31
ELECTRICALSCHEMATIC
(Formachinesbelow
serialnumber038000)3-32............
ELECTRICALSCHEMATIC
(Formachines serialnumber
038000 andabove)3-33...............
ELECTRICALSCHEMATIC,
ACCESSORIES3-34..................

GENERALINFORMATION
vii
255 SERIESII MM189 (6---90)
Page
ELECTRICALSCHEMATIC,AUTO
SHAKER,RFS3-35....................
BELTSANDCHAINS3-37....................
ENGINEFANBELT3-37..................
GOVERNORBELT(Formachines
belowserialnumber038000)3-37......
STATICDRAGCHAIN3-37................
DEBRISHOPPER3-38......................
HOPPERDUSTFILTER3-38..............
TOREMOVEHOPPERDUSTFILTER3-38
TOINSTALL HOPPERDUSTFILTER3-39
DEBRISHOPPER3-39...................
TOADJUSTLOWDUMP
MODELHOPPER3-39..............
TOADJUSTMULTI-LEVELDUMP
MODELHOPPER3-40..............
THERMOSENTRYt3-43.................
BRUSHES3-44.............................
MAINBRUSH3-44.......................
TOREPLACEMAINBRUSH3-44.......
TOCHECKANDADJUST
MAINBRUSHPATTERN3-45........
SIDEBRUSH...........................
3-46 TOREPLACESIDEBRUSH3-47........
SKIRTSANDSEALS3-48....................
HOPPERLIPSKIRTS3-48................
TOREPLACEHOPPERLIPSKIRTS3-48.
BRUSHDOORSKIRTS3-48...............
TOREPLACEANDADJUST
BRUSHDOORSKIRTS3-49.........
REARSKIRTS3-49.......................
TOREPLACEANDADJUST
THEREARSKIRTS3-49............
MAINBRUSHDOORSEALS3-50..........
HOPPERSEALS3-50....................
HOPPERINSPECTIONDOORSEAL3-50...
HOPPERDOORSEALS3-51..............
HOPPERCOVERSEAL3-51..............
HOPPERVACUUMFANSEAL3-51........
BRAKESANDTIRES3-52...................
SERVICEBRAKES3-52...................
TOADJUSTBRAKELINKAGE3-52......
PARKINGBRAKES3-52..................
TIRES3-52..............................
SCRUBATTACHMENT3-53..................
SCRUBATTACHMENT3-53...............
SOLUTIONTANKS3-53...................
SOLUTIONDISTRIBUTIONSYSTEM3-53...
SCRUB BRUSHES3-53...................
TOREPLACESCRUB BRUSH3-54......
TOCHECKANDADJUSTSCRUB
BRUSHPATTERN3-54..............
RECOVERYTANK3-56...................
TODRAINTHERECOVERYTANK3-56. .
TOCLEANTHERECOVERYTANK3-56. .
Page
DEBRISHOPPER3-57...................
SIDESQUEEGEE 3-58...................
TOREPLACESIDESQUEEGEE
BLADE3-58.......................
REARSQUEEGEE 3-59...................
TOREPLACEOR ROTATE
REARBLADE3-59.................
TOREPLACEOR ROTATE
FRONTBLADE3-60................
TOCHECKANDADJUSTREAR
SQUEEGEE 3-61...................
SNOWBROOM3-63........................
SNOWBROOM3-63.....................
TOREPLACESNOWBROOM3-63......
APPENDIX4-1................................
HARDWAREINFORMATION4-3..............
STANDARDBOLT TORQUECHART4-3....
METRICBOLT TORQUECHART4-3.......
BOLTIDENTIFICATION4-3................
THREADSEALANTANDLOCKING
COMPOUNDS4-3....................
HYDRAULICFITTINGINFORMATION4-4......
HYDRAULICTAPEREDPIPEFITTING
(NPT)TORQUECHART4-4............
HYDRAULICTAPEREDSEATFITTING
(JIC)TORQUECHART4-4.............
HYDRAULICO-RINGFITTINGTORQUE
CHART4-4...........................
LOWDUMPMODELPARTS5-1.................
ORDERINGREPAIRPARTS5-3...............
Fig.1--- RecommendedGeneral
MaintenanceItems5-4..........
Fig.2--- ReplacementBrushes5-6..........
Fig.3--- MainFrameGroup5-8.............
Fig.4--- SeatandRadiatorGroup5-10.......
Fig.5--- SeatGroup,Distributorless (DIS)5-12
Fig.6--- RadiatorGroup,Distributorless
(DIS)5-14......................
Fig.7--- EngineCoverandSide
DoorGroup5-16................
Fig.8--- HopperGroup5-18.................
Fig.9--- HopperCoverandFilterGroup5-20. .
Fig.10 --- HopperLiftArmsGroup5-22........
Fig.11 --- SideBrushGroup5-24.............
Fig.12 --- FrontWheelandBrakesGroup5-26.
Fig.13 --- SteeringControlGroup5-28........
Fig.14 --- RearWheelDriveGroup5-30........
Fig.15 --- MainBrushDriveGroup5-32........
Fig.16 --- MainBrushLiftGroup5-33..........
Fig.17 --- Access andKickPanelsGroup5-34. .
Fig.18 --- VacuumFanGroup5-35............
Fig.19 --- InstrumentandControl
PanelsGroup5-36...............

GENERALINFORMATION
255 SERIESII MM189 (6---90)
viii
Page
Fig.20 --- BatteryGroup5-37.................
Fig.21 --- WireHarnessesGroup5-38.........
Fig.22 --- HydraulicHosesGroup5-40........
Fig.23 --- HydraulicPumpsGroup5-42........
Fig.24 --- HydraulicReservoirGroup5-43......
Fig.25 --- HydraulicControlValveGroup5-44. .
Fig.26 --- HydraulicSolenoidValveGroup5-45.
Fig.27 --- HydraulicFilterGroup5-46..........
Fig.28 --- HydraulicCouplingsGroup5-47.....
Fig.29 --- EngineGroup5-48.................
Fig.30 --- EngineGroup,Distributorless
(DIS)5-50......................
Fig.31 --- CarburetorGroup,
Distributorless (DIS)5-52.........
Fig.32 --- FuelTankBumperGroup,LPG5-54. .
Fig.33 --- FuelTankBumperGroup,
Distributorless (DIS)LPG5-56....
Fig.34 --- SheavesandBeltsGroup5-58......
Fig.35 --- CarburetorGroup,LPG5-59........
Fig.36 --- CarburetorGroup,
Distributorless (DIS)LPG5-60....
Fig.37 --- EngineFanandAlternatorGroup,
Distributorless (DIS)5-62............
Fig.38 --- AirCleanerGroup5-63.............
Fig.39 --- AirCleanerGroup,Distributorless
(DIS)5-64
Fig.40 --- DirectionalControlGroup5-65......
Fig.41 --- DirectionalControlGroup,
Distributorless (DIS)5-66.........
Fig.42 --- FlywheelHousingGroup5-68.......
Fig.43 --- FlywheelHousingGroup,
Distributorless (DIS)5-70.........
Fig.44 --- ThrottleLinkageGroup5-71.........
Fig.45 --- MufflerGroup5-72.................
Fig.46 --- MufflerGroup,Distributorless
(DIS)5-73......................
Fig.47 --- FuelTankGroup5-74..............
Fig.48 --- LabelsGroup5-75.................
MULTI---LEVELDUMPMODELPARTS6-1.......
ORDERINGREPAIRPARTS6-3..............
Fig.1--- MainFrameGroup,Multi---Level
Dump6-4.....................
Fig.2--- HopperDoorAssembly,
Multi---LevelDump6-5..........
Fig.3--- HopperGroup,Multi---LevelDump6-6
Fig.4--- HopperLiftArmsGroup,
Multi---LevelDump6-8..........
Fig.5--- HopperCoverandFilterCarrier
Group,Multi---LevelDump6-10...
Fig.6--- HydraulicLiftCylinderGroup,
Multi---LevelDump6-11..........
Fig.7--- StabilizerLegGroup,
Multi---LevelDump6-12..........
Fig.8--- SideBrushGroup,
Multi---LevelDump6-13..........
Page
Fig.9--- MainBrushLiftGroup,
Multi---LevelDump6-14..........
Fig.10 --- FrontWheelandBrakesGroup,
Multi---LevelDump6-15..........
Fig.11 --- HydraulicHosesGroup,
Multi---LevelDump6-16..........
Fig.12 --- HydraulicControlValveGroup,
Multi---LevelDump6-17..........
Fig.13 --- WireHarnessesGroup,
Multi---LevelDump6-18..........
ACCESSORIES7-1............................
ORDERINGREPAIRPARTS7-3..............
Fig.1--- CabKit7-4.......................
Fig.2--- SnowBladeKit7-6................
Fig.3--- SnowBroomKit7-8...............
Fig.4--- MountFrameKit7-10...............
Fig.5--- TireChainKit7-11..................
Fig.6--- FrontWheelAssembly,
LowDump7-11.................
Fig.7--- Headlight,Taillight,and
SpotlightKit,Lintel7-12..........
Fig.8--- RevolvingLightKit,Overhead
Guard7-14.....................
Fig.9--- FlashingLightKit,Overhead
Guard7-15.....................
Fig.10 --- RevolvingLightKit,Shroud7-16.....
Fig.11 --- FlashingLightKit,Shroud7-17......
Fig.12 --- RevolvingLightKit,Cab7-18........
Fig.13 --- FlashingLightKit,Cab7-19.........
Fig.14 --- RearSqueegee Group7-20.........
Fig.15 --- SideSqueegee Group7-22.........
Fig.16 --- TireandWheelAssembly7-23.......
Fig.17 --- FrontWheelAssembly7-23.........
Fig.18 --- ScrubBrushDriveGroup7-24.......
Fig.19 --- SolutionTanksGroup7-26..........
Fig.20 --- RecoveryTankGroup7-28..........
Fig.21 --- ScrubAttachmentCamGroup7-30. .
Fig.22 --- MainScrubberBrushGroup7-31....
Fig.23 --- InstrumentPanelGroup7-31........
Fig.24 --- AirFilterSafetyElementKit7-32.....
Fig.25 --- CloggedFilterIndicatorKit7-33.....
Fig.26 --- HopperDollyAssembly7-34........
Fig.27 --- DryBatteryKit7-35................
Fig.28 --- VacuumWandKit,LowDump7-36. .
Fig.29 --- VacuumWandGroup,
Multi---levelDump7-38...........
Fig.30 --- FuelGaugeKit7-40................
Fig.31 --- BatteryHoldDownKit7-41..........
Fig.32 --- OverheadGuardKit7-42...........
Fig.33 --- FireExtinguisherKit7-43...........
Fig.34 --- AlternatorKit7-43..................
Fig.35 --- SuspensionSeatKit7-44...........
Fig.36 --- SparkArrestingMufflerKit7-44......
Fig.37 --- HoodLatchandMachine
Tie---DownKit7-45..............

GENERALINFORMATION
ix
255 SERIESII MM189 (6---90)
Page
Fig.38 --- ProtectosealFuelTankCapKit7-46. .
Fig.39 --- FuelTanksGroup,LPG7-46........
Fig.40 --- ExtraReachSideBrushGroup,
LowDump7-47.................
Fig.41 --- ExtraReachSideBrushGroup,
Multi---LevelDump7-48..........
Fig.42 --- RearWheelAssembly,Foam
filled7-49.......................
Fig.43 --- RearWheelAssembly,Solid7-49....
Fig.44 --- RearWheelAssembly,
Steelguard7-50.................
Fig.45 --- HeavyDutyRadiatorGroup7-51.....
Fig.46 --- MaximumPathSideBrushGroup7-52
Fig.47 --- HopperandCoverGroup,RFS7-54. .
Fig.48 --- FilterandShakerGroup,RFS7-56...
Fig.49 --- VacuumSystemGroup,RFS7-58....
Fig.50 --- ElectricalandHydraulic
Group,RFS7-60................
Fig.51 --- SwitchandCircuitGroup,RFS7-62. .
Fig.52 --- WireHarnessesGroup,RFS7-63....
HYDRAULIC COMPONENTS8-1...............
ORDERINGREPAIRPARTS8-3..............
Fig.1--- HydraulicPistonPump
Breakdown02703 8-4..........
Fig.2--- PumpHydraulicGear
Breakdown82205 8-6..........
Fig.3--- HydraulicMotorBreakdown
02641 8-7.....................
Fig.4--- HydraulicMotorBreakdown
13106 8-8.....................
Fig.5--- HydraulicMotorBreakdown
27800 8-9.....................
Fig.6--- HydraulicMotorBreakdown
13105 8-10.....................
Fig.7--- HydraulicMotorBreakdown
28808 8-11.....................
Fig.8--- HydraulicMotorBreakdown
77101 8-12.....................
Fig.9--- HydraulicMotorBreakdown
27796 8-13.....................
Fig.10 --- HydraulicMotorBreakdown
27787 8-14.....................
Fig.11 --- HydraulicValveBreakdown
62550 8-15.....................
Fig.12 --- HydraulicValveBreakdown
34319 8-16.....................
Fig.13 --- HydraulicSolenoidValve
Breakdown82754 8-17..........
Fig.14 --- HydraulicCylinder
Breakdown04468 8-18..........
Fig.15 --- HydraulicCylinder
Breakdown82757 8-19..........
Fig.16 --- HydraulicCylinder
Breakdown04471 8-20..........
Page
ENGINEPARTS,GASOLINE,LPG9-1...........
ORDERINGREPAIRPARTS9-3..............
Fig.1--- CylinderHeadGroup9-4...........
Fig.2--- CylinderBlockGroup9-6...........
Fig.3--- CamshaftGroup9-8...............
Fig.4--- CrankshaftandPistonGroup9-10....
Fig.5--- OilPumpandOilPanGroup9-12....
Fig.6--- IntakeandExhaustManifold
Group9-14.....................
Fig.7--- FrontCoverGroup9-15.............
Fig.8--- WaterPumpGroup9-16............
Fig.9--- DistributorGroup9-18..............
Fig.10 --- GasketsGroup9-20................
Fig.11 --- FlywheelGroup9-22...............
ENGINEPARTS,DIS,GASOLINE,LPG10-1......
ORDERINGREPAIRPARTS10-3..............
Fig.1--- CylinderHead,ValvesGroup10-4....
Fig.2--- CylinderBlockGroup10-6...........
Fig.3--- CamshaftandValveControl
Group10-8.....................
Fig.4--- CrankshaftandPistonGroup10-10....
Fig.5--- OilPumpandOilPanGroup10-12....
Fig.6--- IntakeManifoldGroup10-14..........
Fig.7--- FrontCoverAssemblyGroup10-15....
Fig.8--- WaterPumpGroup10-16............
Fig.9--- Distributorless IgnitionGroup10-17....
Fig.10 --- GasketsGroup10-18................
Fig.11 --- FlywheelGroup10-19...............
CROSS REFERENCE11-1......................
PARTNUMBERTOPAGENUMBERCROSS
REFERENCELIST11-3......................
CUSTOMERDOCUMENTS12-1.................
TENNANTCOMPANYLIMITEDWARRANTY12-3
TENNANTCOMPANY,TENNANTCOMPANY
SUBSIDIARIES,ANDMAJORPARTSAND
SERVICELOCATIONSDIRECTORY12-5......

GENERALINFORMATION
255 SERIESII MM189 (6---90)
x

SPECIFICATIONS
1-1
255 SERIESII MM189 (12---89)
SECTION1
CONTENTS
Page
MACHINESPECIFICATIONS1-3...............
POWERTYPE.1-3........................
POWERTRAIN1-3.........................
STEERING1-3............................
HYDRAULICSYSTEM1-3...................
BRAKINGSYSTEM1-4.....................
SUSPENSIONSYSTEM1-4.................
SYSTEMFLUIDCAPACITIES1-4............
GENERALMACHINE
DIMENSIONS/CAPACITIES1-4...........
MACHINEWEIGHTS1-4....................
GENERALMACHINEPERFORMANCE1-4....
MACHINEDIMENSIONS1-5..................

SPECIFICATIONS
255 SERIESII MM189 (12---89)
1-2

SPECIFICATIONS
1-3
255 SERIESII MM189 (12---89)
MACHINESPECIFICATIONS
POWERTYPE
Engineformachinesbelowserialnumber038000.
Type--- piston
Ignition--- breakerless---typespark
Cycle--- 4
Aspiration--- natural
Cylinders--- 4
Bore--- 2.91 in(74 mm)
Stroke--- 2.56 in(65 mm)
Displacement--- 67 cuin(1100 cc)
Netpower--- 25 hp(18.6kw)@2200 rpm,
governed
Netpower--- 31 hp(23.1kw)@2650 rpm,
governed
Netpower--- 44.6hp(32.3kw)@3600 rpm,
maximum
Fuel--- gasoline,87 octaneminimum,unleadedor
LPG
Coolingsystem--- water/ethyleneglycolantifreeze
Electricalsystem--- 12 Vnominal,37 Aalternator
Engineformachines serialnumber038000 and
above.
Type--- piston
Ignition--- breakerless---typespark
Cycle--- 4
Aspiration--- natural
Cylinders--- 4
Bore--- 2.70 in(69 mm)
Stroke--- 2.97 in(76 mm)
Displacement--- 67 cuin(1100 cc)
Netpower--- 25 hp(18.6kw)@2200 rpm,
governed
Netpower--- 31 hp(23.1kw)@2650 rpm,
governed
Netpower--- 44.6hp(32.3kw)@3600 rpm,
maximum
Fuel--- gasoline,87 octaneminimum,unleadedor
LPG
Coolingsystem--- water/ethyleneglycolantifreeze
Electricalsystem--- 12 Vnominal,37 Aalternator
POWERTRAIN
Propelling--- hydraulicdrivemotor,rearwheel
Mainbrush--- hydraulicdrivemotor
Sidebrush--- hydraulicdrivemotor
Vacuumfan--- hydraulicdrivemotor
STEERING
Type--- rearwheelcontrolled,automotivewormand
sectorgear
Powersource--- manual
HYDRAULICSYSTEM
Function--- operatespropelling,hopperlift,hopper
dump,mainbrushdrive,sidebrushdrive,and
vacuumfandrive.
Controlvalve,lowdumpmodel,sidebrushdrive,
hopperlift--- opencentertype,singlespool.
Controlvalve,multi---leveldumpmodel,sidebrush
drive,hopperlift,hopperdump--- opencenter
type,twospool.
Controlvalve,vacuumfandrive,mainbrushdrive---
opencentertype,singlespool,solenoid
operated.
Pump,propelling--- variabledisplacementpiston
type,1.24 cuin(20 cc)maximumdisplacement
per revolution,
11.8gpm(45 L/min)@2200 rpm,
14.2gpm(54 L/min)@2650 rpm
Propellingsystemreliefpressure--- 2750 psi
(18,960 kPa)
Pump,accessories--- geartype,
1.02 cuin(14 cc)displacement,
9.5gpm(36 L/min)@2200 rpm,
12.3gpm(47 L/min)@2650 rpm.
Sidebrushandliftcylindersystemrelief
pressure--- 1900 psi(13,100 kPa)
Vacuumfanandmainbrushmotorsystemrelief
pressure--- 2150 psi(14,825 kPa)
Motor,propelling--- internalgeartype,
18.6cuin(305 cc)displacementper revolution,
4500 psi(31,030 kPa)maximumrated
pressure.
Motor,mainbrush--- internalgeartype,
4.5cuin(75 cc)displacementper revolution,
2500 psi(17,240 kPa)maximumrated pressure
Motor,sidebrush--- internalgeartype,
2.8cuin(45 cc)displacementper revolution,
1500 psi(10,340 kPa)maximumrated pressure
Motor,vacuumfan--- externalgeartype,
0.26 cuin(5cc)displacementper revolution,
3000 psi(20,685 kPa)maximumrated
pressure

SPECIFICATIONS
255 SERIESII MM189 (12---89)
1-4
Cylinder,hopperlift,lowdumpmodel--- single
actiontype,2.5in(65 mm)borex6in
(150 mm)stroke,1.12 in(29 mm)diameter rod,
2500 psi(17,240 kPa)maximumrated pressure
Cylinder,hopperlift,multi---leveldumpmodel---
singleactiontype,3.5in(90 mm)borex
8in(205 mm)stroke,1.25 in(32 mm)diameter
rod,2500 psi(17,240 kPa)maximumrated
pressure
Cylinder,hopperdump,multi---leveldumpmodel---
doubleactiontype,2in(50 mm)borex
5.38 in(135 mm)stroke,1in(25 mm)diameter
rod,2500 psi(17,240 kPa)maximumrated
pressure
BRAKINGSYSTEM
Servicebrakes--- mechanicaldrumbrakes(2),one
perfrontwheel,linkageactuated
Parkingbrakes--- utilizeservicebrakes,linkage
actuated
SUSPENSIONSYSTEM
Front,lowdumpmodel--- two4x16
semi---pneumatictires
Front,multi---leveldumpmodel--- two4x16 solid
tires
Rear--- one5.70 x8pneumatictire
Rear--- one5.00 x8solidtireaccessory
SYSTEMFLUIDCAPACITIES
Enginecoolingsystem,radiator--- 4qt(3.8L)
Enginecoolingsystem,total--- 16 qt(15 L)
Enginelubricatingoil--- 3.5qt(3.3L)withfilter
Fueltank,gasoline--- 7.8gal(30 L)
Fueltank,LPG--- 33 lb(15 kg)
Hydraulicsystem,reservoir--- 5gal(19 L)
Hydraulicsystem,total--- 6.3gal(24 L)
GENERALMACHINEDIMENSIONS/CAPACITIES
Length,lowdumpmodel--- 96 in(2440 mm)
Length,multi---leveldumpmodel--- 98 in
(2490 mm)
Width,lowdumpmodel--- 56 in(1420 mm)
Width,multi---leveldumpmodel--- 59 in(1500 mm)
Height--- 52 in(1320 mm)
Heightwithoverheadguard--- 79 in(2005 mm)
Heightwithoverheadguardandhazardlamp---
85 in(2160 mm)
Heightwithcab--- 77 in(1955 mm)
Heightwithcabandhazardlamp--- 83 in
(2110 mm)
Track--- 46 in(1170 mm)
Wheelbase--- 38 in(965 mm)
Mainbrushdiameter--- 14 in(355 mm)
Mainbrushlength--- 42 in(1065 mm)
Sidebrushdiameter--- 21 in(535 mm)
Sweepingpathwidth--- 42 in(1065 mm)
Sweepingpathwidthwithsidebrush--- 53 in(1345
mm)
Hoppercapacity--- 1000 lb(455 kg)
Hoppercapacity--- 14 cuft(0.4m#)
Dustfilterarea--- 110 sqft(10.2m@)
MACHINEWEIGHTS
Netweight,lowdumpmodel--- 2150 lb(975 kg)
Netweight,multi---leveldumpmodel--- 2800 lb
(1270 kg)
GVWR,lowdumpmodel--- 3200 lb(1450 kg)
GVWR,multi---leveldumpmodel--- 3800 lb
(1725 kg)
GENERALMACHINEPERFORMANCE
Maximumforwardspeed--- 8.5mph(13.7km/h)
Maximumreversespeed--- 4.2mph(6.8km/h)
Minimumisleturnwidth,right,lowdumpmodel---
154 in(3910 mm)
Minimumisleturnwidth,left,lowdumpmodel---
101 in(2565 mm)
Minimumisleturnwidth,right,multi---leveldump
model--- 161 in(4090 mm)
Minimumisleturnwidth,left,multi---leveldump
model--- 111 in(2820 mm)
Maximumratedclimb/descentangle--- 10_withfull
hopper,15_withanemptyhopper