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RENR7954-01June 2006

D6R Series III Track-Type Tractor Power Train SystemGJB1-UPWCB1-UPHDC1-UPRFC1-UPTBC1-UPJEK1-UPHCD1-UPHKE1-UPWRG1-UPMTJ1-UP

2006 Caterpillar All Rights Reserved

Printed in U.S.A.

DMK1-UPLGP1-UPJDL1-UPDLM1-UPLFM1-UPEXL1-UPDPS1-UPEXW1-UPGMT1-UPMRT1-UP

Belowandtotherear of theengineoilcooleristhe oil- to-watertypepowertrainoilcooler.

Power Train Oil Pump

C L1 C L 2 C L 3CL4 C L5 P L1

C L 1 C L 2 C L3CL4 C L5 P L1

61

2

9

3

11

610

M N

Openingthetopdoorof the forwardcompartment ontheright fendergainsaccesstothecombinationpowertrainoilf illtubeanddipstick(Q).

Openingthefront doorof theforwardcompartment onthe right fendergainsaccessto thepowertrainoil f ilter(S). Thisspin-ontype canister containsareplaceable6-micronfilterelement. The filterbasecontainsafilterbypassswitch(R). Thisisa normallyopenswitchthat isheldclosedbythefilterbypassvalvespool.Thebypassvalveopens,allowingtheswitchtoopen,whenthedifferenceinpressurebetweenthefilter inletandthefilteroutlet becomesgreat enough(approximately50psi) . TheswitchismonitoredbytheCaterpillarMonitoringSystemand alertstheoperator tothefilterbypasscondition.

Thefilterbasealsocontainsthepowertrainoilsampling(AA)andapressuretest port (BB)forthetransmissionchargingcircuit. Thepressuretestport is situateddownstreamfromthefilter. Thepowertrainoilsamplingport is situatedupstream, or beforethefilter.

Alsolo catedin theforward compartment on theright fen derand inboardfrom thepower trainoi lfilter canister arethe following service points:

(T). remotepowertrainbreather (M). remotepressuretest port fortorqueconverterinlet pressure(N). remotepressuretest port fortorqueconverteroutlet pressure

Locatedat therearof themachine, ontop of thethetransmissioncasearethefollowingservicepoints:

1. Transmissionmain relief pressuretest port (P)2. Transmissionlubepressuretest port (L1)3. Transmissionlubetemperaturesensor

Pressuretest portsforeachof thefivetransmissionclutchesremainonthetransmissioncover. Thesepressuretest portsare:

(CL1). Transmission clutch (reversecl utch)(CL2). Transmission clutch (forwardclutch)(CL3). Transmissionclutch(speed3)(CL5). Transmissionclutch(speed1)(CL4). Transmissionclutch(speed2)

Clutchengagement pressure calibrationsare no longerrequired, withthe commontop pressure strategy. Proper adjustment of thetransmissionmainrelief valvewillset the properpressurefortheoperationof all f ivetransmissionclutchesandthebrakes. I t isstillnecessarytoperformtransmissionclutchfillcalibrationsandtoperformbraketouch-upcalibrations.

Thescreenedmainsuctionmanifold(A)forthepowertrainoilpumpislocatedat theright front of themain case, near thebottom.

Thethree-sectiongear-typepowertrainoil pump(B) ismountedtothefront of themaincase, at theupperright.

Theelectronicbrakevalve(C)islocatedontopof themaincase, tothe left of center.

The torqueconverterinlet relief valve and the lubed i s tr i bu t i on m a ni f o ld a r e b o th i n c or p or a te d i n t o o n ehousing(D). Thesetwo componentsaremountedto theleft front of themaincase, nearthebottom.

Thetorqueconverterinlet relief valve(J) andthe lubed i s tr i bu t i on m a ni f o ld ( L ) a r e b o th c o n ta i n ed i n o n ehousing. Oilfromthe torqueconverterchargingsectiono f t h e p o w er t r a i n o i l p u mp i ssu p p l ie d t o t h e t o r q ueconverterinlet relief valvethroughtheupperhose(K).

Thetorqueconverterinlet relief valveisinstalledin thehousing. Excessoil f lowspast theinlet relief valveintothemainsumpthroughaport inthefront of thecase, andbehindthehousing. Oilf lowto thetorqueconverterinletisthroughthehoseon theright (N).

Cooledoilfromthepowertrainoilcoolerisdirectedtothelubedistr ibutionmanifold(L)throughthehoseontheleft(M). Thesmallerhose(P)isthelineleadingtotheremotepressuretest port for torqueconverterinlet pressure( ) . Thisremotepressuretest port islocatedinsidethefront compartment ontheright fender

T he p o we r t r a in o il p um p d r a ws o il f or t he t o rq uec o nv e r te r c h a rg i ng c i r cu i t a n d f o r t h e t r an sm iss i oncharging circuit froma screenedsuctionmanifoldthatconnectsto thepumpat thepump inlet (E).

Thetorqueconverterchargingsection(F) of thepower trainoilpumpsuppliesapproximately145L/min. (38.3USgal. /min. )of oiltothetorqueconvertercircuit foroperation

of thetorqueconverterandfor lubricationpurposes.

Thetransmissionchargingsection(G)of thepowertraino i l p u m p su pp l i es a p p ro x i ma t el y 5 4 L / mi n . ( 1 4. 3 U Sgal. /min. )of oiltothetransmissionandbrakescircuit.

Thetransmissionandtorqueconverterscavengesection(H)of thepowertrainoilpump drawsapproximately125L/min. (33USgal. /min. )fromthetorquedividercase, andthetransmissioncase.

Thescavengeoilisusedforlubricationof thesteeringdifferential. Thepowertrainoiltemperaturesensor( I )providesmainsumpoiltemperatureinformationtotheMachineECM. Thisisthe temperaturesensorthat isconsideredwhenperformingpowertraincalibrations, suchasbraketouch-upsandtransmissionclutchfillcalibrations.

Thetransmissionchargecircuit accumulatorismountedbeneaththefueltankandlocatedabovethe transmissioncase.

Thisaccumulatoris pre-chargedto approximately1724kPa(250 psi) . I t is usedto helpmaintaintransmissionchargecircuit pressureforshort periodsof time, suchaswhentransmissionclutchesare filling(shif ts)or at other timeswhen thepressure in thetransmissionchargingcircuit maybecometoolow(coldoil, lowidle, etc. ) .

No. SchematicLocationPart

Number Description

1 C -4 2 26 -3 90 2 P OWE R TR AIN O IL PU MP (3 S EC TIO N)2 A -5 2 35-5812 POWER TRAIN OIL FILT ERS3 2 13-1308 ELECTRONIC BRAKE CONTROL VALVE4 E -4 2 63 -9 94 9 L UB E DIS T. / TC IN LE T RE LI EF MA NI FO LD5 9G-5127 BREATHER6 D -3 2 20 -1 41 8 T OR QU E C ON VE RT ER O UT LE T RE LI EF V AL VE7 B-1 238-1116 OIL COOLER8 231-4166 PUMP INLET SCREEN / HOUSING GP.9 E-5 220-1429 TRANSMISSION AR.

10 F-6 2 31-5969 LEFT DRIVE / BRAKE GP.11 A -6 2 31-5990 RIGHT DRIVE / BRAKE GP.1 2 B -2 2 32 -6 20 7 T OR QU E C ON VE RT ER / HOU SI NG GP.13 241-5635 DIPSTICK

COMPONENT LIST

C-4

14 N/A 223-9039 OIL FILL TUBEN/A

N/A

TapNumber

SchematicLocation Description

ENGINE SPEEDTRANS. GEARP/TOILTYPEPTO SUMPOIL TEMP

B E-6 BRAKE PRESSUREP D-8 TRANS. MAIN RELIEFM E-4 T/C SUPPLY PRESSUREN D-3 T/C OUTLET PRESSUREL2 E-2 FLYWHEEL LUBE PRESSUREL1 C-8 TRANS. L UBE PRESSURE

LB1 E-6 L BRAKE LUBE PRESSURELB2 A-6 R BRAKE LUBE PRESSURECL1 C-6 TRANS. CL UTCH 1 PRESSURECL2 C-7 TRANS. CL UTCH 2 PRESSURECL3 D-7 TRANS. CL UTCH 3 PRESSURECL4 D-7 TRANS. CL UTCH 4 PRESSURECL5 D-6 TRANS. CL UTCH 5 PRESSURE AA A-4 PTO SAMPLING PORT(SOS)

ER1

Tap Locations

C-1

E-5

Hydraulic Symbols (Electrical)

Electrical Symbols Table

325-AG135PK-14

Circuit IdentificationNumber

WireColor WireGauge

HarnessidentificationcodeThisexampleindicateswire135inharness"AG".

325-PK-14

WireGauge

WireColor

Circuit Number Identification

Wire Number Identification Codes

Current Standard

Previous Standard

Electrical Schematic Example Hydraulic Schematic Example

325-PK

WireColor Circuit Number Identification

B A

Wire

Wire

(EXAMPLE VALVE)

Current Standard

Transducer (Fluid)

Transducer (Gas / Air)

G

Generator

Electrical WirePressure Switch

MElectric Motor

Pressure Switch(Adjustable)

Temperature Switch

T

PressureSymbol

TemperatureSymbol

LevelSymbol

FlowSymbol

Electrical Symbols (Electrical)

ONE POSITION T WO P O SI TI ON T HR EE P OS IT IO N

VENTED PRESSURIZED RETURNABOVEFLUIDLEVEL RETURNBELOW FLUIDLEVEL

LINES CROSSING LINES JOINING

TWO-WAY THREE-WAY FOUR-WAY

SPRING CONTROLVALVES RESTRICTION LINE RESTRICTION(FIXED)

2-SECTIONPUMP

MAINAUX.

SPRING(ADJUSTABLE)

VARIABILITY LINE RESTRICTION(VARIABLE)

LINE RESTRICTIONVARIABLEandPRESSURE

COMPENSATED

PRESSURECOMPENSATION

PUMP: VARIABLE andPRESSURE COMPENSATED

ENERGYTRIANGLESH Y D RA U L IC PN E UMAT IC

MEASUREMENT

PRESSURE TEMPERATURE FLOW

ROTATING SHAFTS

UNIDIRECTIONAL BIDIRECTIONAL

PUSH-PULL LEVER PEDALGENERAL MANUAL PUSH BUTTON SPRING

MANUALCONTROLSYMBOLS

HYDRAULICMOTORS

FIXEDDISPLACEMENT

VARIABLE DISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

HYDRAULICPUMPS

FLUIDSTORAGE RESERVOIRS

CROSSING ANDJOINING LINES

VALVE ENVELOPES VALVE PORTS

BASICCOMPONENT SYMBOLS

FLUIDCONDITIONERPUMPorMOTOR

FLUID POWER SYMBOLS

FIXEDDISPLACEMENT

VARIABLEDISPLACEMENTNON-COMPENSATED

UNIDIRECTIONAL

BIDIRECTIONAL

VALVES

PILOT CONTROLSYMBOLSRELEASEDPRESSURE

EXTERNALRETURN INTERNALRETURN

REMOTE SUPPLYPRESSURE

SIMPLIFIED COMPLETE INTERNALSUPPLYPRESSURE

ACCUMULATORS

SPRING LOADED GAS CHARGED

SOLENOIDorMANUAL

SOLENOIDandPILOT

SOLENOIDandPILOTorMANUAL

COMBINATIONCONTROLS

SOLENOID SERVO THERMAL DETENT

HYDRAULICANDPNEUMATIC CYLINDERS

DOUBLE ACTINGSINGLE ACTING

BASICSYMBOL

SPRINGLOADED

CHECKVALVES

TWOPOSITION

INFINITEPOSITIONING

FLOW INONEDIRECTION

FLOW ALLOWEDINEITHERDIRECTION

THREEPOSITION

CROSSFLOW

PARALLELFLOW

INTERNALPASSAGEWAYS

NORMALPOSITION

AB

PT

AB

PTS H IF T ED P O S IT I ON I N FI N IT E P O SI T IO N

CONTROLVALVES

ATTACHMENT

MANUALSHUTOFF

SHUTTLE PILOTCONTROLLED

4

5

781011 12

1 3 1 4

2 5

1 3 1 4

1 8

4 12

7

9

3

M N

AA

AA

L B1 L B2

LB2

LB1 B

B

L1

P

CL1CL2CL3CL5CL4

Transmission LubeTemperatureSensor

Transmission Housing

Transmission LubeTemperatureSensor

L1

P

CL2

CL3

CL5

CL4

CL1

ECPCXMSNClutchValves

Transmission ChargeCircuit Accumulator

Transmission ChargeCircuit Accumulator

Transmission Group Power Train Oil Cooler

Power Train Oil Filter Group

Component and Tap Locations

1

9

2

PowerTrainOilCooler

EngineOilCooler

A

B C

D

H

G

F

EI

J K L M

N

P

M N

T

SQ RBBBB

BB A-5 PTO PRESSURE

AA AA

7

Right Side Left SideECPC XMSNClutch Valves

CL4

CL2CL3

CL5

CL1

M

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C

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E

F

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B

C

D

E

F

B

HYDRAULIC CIRCUIT COLOR DESCRIPTIONSBrakes.SupplyLine.Drain/ ReturnLine.

TransmissionandTorqueconverterScavengePumpTorqueConverterChargePump andPowertrainOil Cooler

TransmissionChargePump.

THIS SCHEMATIC IS FOR THE D6R TRACK-TYPE TRACTORPART#: 270-8369 CHG 01Componentsareshowninstalledona fullyoperablemachinewiththekey andengineoff andtransmissionshif ter inneutral.

RefertotheappropriateServiceManualforTroubleshooting, Specif icationsandSystemsOperations

FLYWHEELHOUSING

TORQUECONVERTER

LB1

BRAKELUBE

BRAKE LUBE

LB2

ER1

A B C

IMPLEMENTPUMP

3RD 1ST2ND

EB BRAKE VALVE

TRANSMISSIONCONTROL VALVE

XMSN LUBE

FWD

VENT LINE

SUCTION SCREEN

MAINRELIEF

DIFF STEERBEVEL & TRANSFER

GEAR LUBE

ENGINE

SCREEN

C9XL, XW, LGP 200 NET HP

STD 185 NET HP AT 1850 RPM

POWERTRAINOIL COOLER

M

L2

3

CL2

CL4

PROPORTIONALVALVE

PROPORTIONALVALVE

PROPORTIONALVALVE

PROPORTIONALVALVE

PROPORTIONALVALVE

DRIVESHAFT

L1P

CL1CL2CL3CL5

CL4

CL3 CL5

P

B

ECPC XMSNCLUTCH VALVES

REV

CL1

L1

CLUTCH/BRAKES

CLUTCH/BRAKES

N

SCAV T/CTRANS

RIGHT BRAKEPRESSURE PORT

LEFT BRAKEPRESSURE PORT

109

4

1

8

11

7

12

6

PROPORTIONALVALVE

LINE PATTERNS

Drain/ ReturnLines

Component Group

Pilot / LoadSensingPressure

PressureLine

Attachment

AirLine

CALLOUTS

Taps (Pressure, Sampling,Sensor)byletter

Components bynumber

YY

52

AA

NOTES:

(A) TRANSMISSION AND CONVERTER SCAVENGE PUMP(B) TRANSMISSION CHARGE PUMP(C) TORQUE CONVERTER CHARGE PUMP

SCAVENGE OUTPUT ANDDIFF STEER LUBE

TRANS. LUBETEMP. SENSOR

PTO TEMP.SENSOR

BB

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