MCi 102D Series User manual

102D SERIESMAINTENANCEMANUAL
13---TRANSMISSION13A2-1Page
August2000 Date
SECTION13A2
AUTOSHIFT TRANSMISSION(10-SPEED)
CONTENTSOFTHIS SECTION
SUBJECTPAGE
GeneralDescription13A2-1..............................................
Components13A2-1....................................................
Operation13A2-3.......................................................
Maintenance13A2-3....................................................
MiscellaneousTorqueSpecifications13A2-5...............................
Specifications13A2-5...................................................
CapacitySchedule13A2-5...............................................
GENERALDESCRIPTION
SomeDSeriescoachesmaybe equippedwiththe
FullerRModelRTAO-14710-B-AS(semi-electronically
controlledair-assisted)10-speedauto-shifting
transmission(Figure).Thistransmissionfeaturesonelow
reversegearandtenforwardgears.The
RTAO-14710-B-AStransmissionisratedforenginesupto
400 hpand1,450 ft-lbstorque(1936 NSm)
Thistransmissionfeaturesheavy-dutycaststeel
housings,twincountershaftgeararrangements,fine
pitch“multi-mesh”gearing,two-pieceinputshaftand
drivegeardesign,repeatandnon-repeatingshift
patterns(manuallyshiftedtransmissions),airactuated
buttonoperatedrangeshifting,remoteshiftcontroland
integralclutch housingreleasemechanism.Additionally,
theRTAO-14710-B-ASseriestransmissionfeatures
electronicallycontrolled,dualservomotorautomatic
shiftingwithinaspecifictransmissiondriverange.
Theauto-shiftedRTAO-14710-B-AStransmission
utilizescomputercontrolledelectricshiftmotors
connectedtothestandardthree railrepeatpattern,and
aircylinderactuatedrangeshiftingfunction.
NOTE:TheRTAO-14710-B-ASautoshift transmission
requireclutchdisengagement toselect thedrive
range,eitherofthetwolowestforwardgearsorthe
reversegear.
COMPONENTS
COUNTERSHAFTS
Twincountershaftdesigndividestheratedtorque
equallybetweentwoshafts.Becauseoftorquesplitting,
eachgearsetcarriesonlyhalftheload,greatlyreducing
thefacewidthofgears.
MAINSHAFT
Themainshaftassemblyfeaturesthefloating gear
principle.Thesegears,when notengaged bytheslide
clutchgears,“float”onorbetweentheiradjacent twin
countershaftgears,eliminatingtheneedforgearsleeves
and bushings.
NOTE:Onlythecountershaftgearswhichmatewith
multi-meshmainshaftgearshavefinepitchgearing
(i.e., firstandreversegearsareofthecorsepitch
conventionalgearingtype).
HOUSING
Theclutchhousingmountstotheengine,andthegear
caseandclutch housingsboltdirectlytoeachother.The
gearcaseprovidesforoilsump,fill and drainplugs,
remoteshiftcontrolmountingandvariousbearingand
inspection handholecovers.
CLUTCHRELEASEMECHANISM
Theclutch housingincorporatesprovisionsforthe
pull-typeclutchreleasebearingcarrier,releaseyoke,
shaftsandadjustableactuatingarm.Theclutchcontrol

102D SERIESMAINTENANCEMANUAL
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August2000 Date
housingincorporateslubegalleriesforgreasingthe
releasebearingshafts.Formoreinformationregarding
thereleasemechanismsee section5.
ELECTRONIC CONTROL
Theshiftbarhousingservomotorsarecontrolled by
theECUofthecontrolcomponents.TheECUisattached
tothetransmissionandconnectedtothe engineECU,
shiftselector,speedsensorsandothertransmission
controldevicesthroughwireharness.
NOTE:Engineandtransmissionelectronic control
systemswill incorporateaninterfacemodulebetween
ECUmodules.
Figure.RTAO-14710 Auto-ShiftTransmission
C0384
Theshiftbarhousingonthe electronicallycontrolled
autoshift transmissionisfittedwithdualelectricindexing
(lateralandlongitudinaldirection)motorsthatactuatethe
shiftforksandslidetheclutchgearsforwardorbackward
toengagegears.Themotorcommandsaredirected by
the electronic controlsystemECU.
SHIFTSELECTORMODULE
Theautoshifted10-speedtransmissionsutilizeashift
bywiresystemconsistingoftheEatonDriverCommand
Console(DCC)selectorcontrolmodule.Thismoduleis
connectedtothetransmissionECUbyharness.Theshift
selectorcontrolmodulemayuse eitherleveractuatedor
touchpadtypecontrol(Figure).

102D SERIESMAINTENANCEMANUAL
13---TRANSMISSION13A2-3Page
August2000 Date
Figure.10-SpeedAuto-Shift
GEARSELECT
LEVERDETENT
BUTTON
C0383
INDICATOR
LAMPS
OPERATION
Toconvert theconstanthigh-speed,high-torque,
rotationalenergyofthe engineintoavariablespeed,
highertorquelow-inertiarotationthatcanbeusedto
movethecoach,thetransmissionmustbeabletobe
shiftedfromonegear rangetoanother.Gearshiftsare
accomplishedthroughanarrangementof fourfork
actuatedslidingclutchgearspositionedalongthe
mainshaftofthetransmission.
Inputshaftrotationistransmittedtotwincountershafts
eithersideofthemainshaft.Thecountershaftsarefitted
withgearsthatcontinuouslyrotateandrotateamating
gearonthemainshaft.Rotatingmainshaftgearsarenot
directlycoupledtothemainshaft,therefore,shaftrotation
isachievedonlybyengagementoftheslideclutchgears.
Eachslidingforkoftheshiftbarhousingisattachedto
oneoftheslidingclutchgears.Asashiftforkisindexed
foraspecificspeedviatheremoteshiftcontrol,theclutch
gearmovestoengagetheinnergearoftheadjacentfront
or rearmainshaftfloating gear.Engagementintothe
rotatingmainshaftgearcausestheslidegeartorotate
andturnthemainshaftandoutputshaft.Theselection
andengagementofaspecificgeartherebyincreasesor
decreasestheoutputshaftspeedofthetransmission.
TheRTLO-14610-Ausesasplitteraircylindertoshift
theslideclutchgearthateitherengagesordisengages
thethesplittergear,whichinturnengagesordisengages
thefrontboxfromtherearauxiliaryboxandcountershaft.
ShiftingoftheRTAO-1470-B-ASautoshift
transmissionisperformedthroughthe electronicleveror
touchpadshiftselectormodule.intothe“D”(drive)range
will allowthe electronic controlsystemECUto
automaticallyupshiftordownshift thetransmissionas
needed.Theclutchmustbeused(disengaged)when
shiftingintothe“D”rangefromanyotherpreviously
selectedgear.Thiselectricallyshiftedtransmissionalso
utilizesandcontroltheairactuatedrangecylinder
operationsfor rangeshiftfunctions.
MAINTENANCE
PERIODICINSPECTIONS
Every5,000 miles(8,000 km)or150 operatinghours
cleanthe exteriorofthetransmissionandmakethe
followinginspections:
1.Checkall transmissiontoenginemounting
fasteners.
2.Checkforanylooseelectricalharnessesorairline
connections.
3.Removefillerplugordipstickandchecklubeoil
level.Checkforanyoil leaks.
4.Checkforcorrectadjustmentandoperationof
clutchreleasemechanism.
5.Cleanaldirt,dustandforeignobjectsoff theshift
selectormodule.Keepforeignobjectsandliquidsaway
fromshiftconsole.
LUBRICATION
Thetransmissionisdesignedsothatall internalparts
including gears,bearingsandshaftsare eithersplash
lubricated,oroperateinanoilbaththatiscirculated by
themotionofthegearsandshafts.Alwaysmaintain
properlubeoil levelstoassureaprotectiveoilfilmonall
loadedsurfacesofgearsand bearings.If fluidlevelistoo
low,metaltometalcontactwhichcausesscoring,scuffing
andseizurecouldoccur.
NOTE:Ifthelevelistoo high,oilmaybeforcedoutof
thecasethroughthemainshaftopenings.
InitialServiceInterval
Theinitial“factoryfill”lubricantshould bedrained
betweenthefirst3,000to5,000miles(4,827to8,045km).

102D SERIESMAINTENANCEMANUAL
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August2000 Date
CAUTION
Duringinitialoperationtinymetalparticlesare
freedfromthematingsurfacesofmovingparts.
Thelubricantcarriestheseparticlesthroughout
thetransmissionandmaycause excessive
wear.Removeall metalparticlesfoundonthe
magneticplug(s).
NormalServiceInterval
OntheautoshiftedFullermodelRTAO-14710-B-AS,
every250,000 miles(402,000 km)or7,500 operating
hoursthesynthetictransmissionfluidshould be
changed.UselubricationspecificationS-27 (Synthetic
ManualTransmissionGearOil-EATONRoadranger
CD50 orMOBILMobiltransSHC-50).
1.Operatethetransmission untilnormaloperating
temperatureisreached.
2.Removethebottomdrainplug(s)and draintheoil
whilewarm.
3.Fillthroughdipsticktubetodipstickfulllevelmark.
Ontransmissionswithoutdipstick,removethesidefill
plugandrefill thetransmission untiloil levelisevenwith
bottomofhole.
4.Thoroughlycleantheplug(s)beforere-installing.
REMOVAL
NOTE:Useofasuitablesling,transmissionjackor
dollyisrecommended duringstep11 oftheremoval
procedure.Atransmissiondollyisavailablethrough
partsoutletsormaybefabricatedas shownon
drawing20-233.See “ServiceTools”atendofthis
section.
1.Placebatterydisconnectswitch“Off”.Applythe
parkingbrakeand blockvehiclewheels.
2.Drainthelubricantfromthetransmission,and
removethedipstickandtubeifequipped.
3.Disconnect thereverseswitch harness andtone
ringspeedsensorharness ifequipped.Onautoshift
transmissionsdisconnect the engineECUandshift
moduleharness.
4.Loosenturnbuckleandunfastentheclutch
releasearmreturnsprings.
5.Disconnect theclutchrearcontrolcablefrom
releasearm.
RECOMMENDEDLUBRICANTS
TypeGrade
(SAE)Ambient Temperature
Heavy DutyEngineOil
MIL-L-2104CorMIL-L-46152
orAPI-SForAPI-CD
50
40
30
Above10_F(-12.2_C)
Above10_F(-12.2_C)
Below10_F(-12.2_C)
MineralGearOilwithrust
andoxidationinhibitor
API-GL-190 80WAbove10_F(-12.2_C)
Below10_F(-12.2_C)
MidEPGearOil*
MIL-L-2105 orAPI-GL-490 80W10_Fto 100_(-12.2_Cto 38_C)
-15_Fto 70_F(-26_Cto 21_C)
MultipurposeGearOil*
MIL-L-2105BorMIL-L-2105C
orAPI-GL-5
85W144
80W140
90
80W90
80W
75W
Above10_F(-12.2_C)
Above-15_F(-26_C)
10_Fto 100_F(-12.2_Cto 38_C)
-15_Fto 100_C(-26_Cto 38_C)
15_Fto 70_(-9.4_Cto 21_C)
-40_Fto 15_F(-40_Cto 26_C)
*MildEPgearoilormulti-purposegearoilarenot recommended
whenlubricant operatingtemperaturesareabove230_F(110_C).
LubricantChart
6.Rotatethelevertopermit thereleaseyokeforkto
turn upand pull free oftheclutchreleasebearing.
7.Unfastenandremovethesplinedleverandslide
releasearmoff shaft.
8.Disconnect thetransmissionairline.
9.Disconnect thedriveshaftfromthetransmission.
Refertothe“DriveshaftRemoval”procedureinsection
14.13.Removethe engineandtransmissionmoduleas
anassembly.Refertothe“EngineRemoval”procedure
showninsection8A1thru8A4.
14.Disconnect thetransmissionbottomsupport
mountingfastenersfromthe enginecradleifequipped.
15.Removethemountingcapscrewsattachingthe
transmissiontothe engineflywheelhousingandslide
transmissionoutandawayfromenginewhilemaintaining
alignment.
CAUTION
Properengine-to-transmissionalignmentmust
bemaintainedwhileremovingtransmissionto
preventclutchandinputshaftbinding.Donot
allowtherearofthetransmissiontodropdown
andhangunsupportedinthesplinedhubsofthe
clutchdiscs.Failureto observethiscautionwill
resultinbendingordistortionoftheclutch
frictiondiscs.
NOTE:Inspect the engine-to-transmissionmounting
surfaces,pilotshaftbearingand bearingmountin
flywheelforanysignsofwear.

102D SERIESMAINTENANCEMANUAL
13---TRANSMISSION13A2-5Page
August2000 Date
INSTALLATION
1.Install thetransmissioninreverseorderofthe
“Removal”procedure.
MISCELLANEOUSTORQUESPECIFICATIONS
MainDriveGearBearingNut250-300 ft-lbs...........................................................
MainshaftRearBearingCoverCapscrews35-45 ft-lbs.................................................
ClutchHousingCapscrews90-100 ft-lbs.............................................................
ClutchHousingHandHoleCoverCapscrews20-25 ft-lbs..............................................
FrontCountershaftBearingCoverCapscrews35-45 ft-lbs..............................................
RearCountershaftBearingCoverCapscrews35-45 ft-lbs..............................................
OilDrainPlug45-55 ft-lbs..........................................................................
OilFill Plug60-75 ft-lbs............................................................................
OutputShaftYokeNut400-450 ft-lbs.................................................................
ReverseSignalSwitch35-45 ft-lbs...................................................................
SPECIFICATIONS
TRANSMISSIONASSEMBLY
ManufacturerEaton/Fuller...........................................................................
PartNumber(ModelRTAO-14710-B-AS)13L-1-150.....................................................
GEAR RATIOS-MODELRTAO-14710-B-AS
FirstGear(ModelRTAO-14710-B-AS)10.99..........................................................
SecondGear(ModelRTAO-14710-B-AS)8.18........................................................
ThirdGear(ModelRTAO-14710-B-AS)6.07..........................................................
FourthGear(ModelRTAO-14710-B-AS)4.46.........................................................
FifthGear(ModelRTAO-14710-B-AS)3.32...........................................................
SixthGear(ModelRTAO-14710-B-AS)2.46...........................................................
SeventhGear(ModelRTAO-14710-B-AS)1.83........................................................
EightGear(ModelRTAO-14710-B-AS)1.36..........................................................
NinthGear(ModelRTAO-14710-B-AS)1.00..........................................................
TenthGear(ModelRTAO-14710-B-AS).74............................................................
LOReverseGear(ModelRTAO-14710-B-AS)11.23....................................................
CAPACITYSCHEDULE
RTA-14710-BInitialFactoryFill:26 Pts.(12 L)ServiceFill:26 Pts.(12 L)