_994 cargador articulado

1

INTRODUCTION

994 WHEEL LOADER

3516 Engine

Rear Pump Drive

Torque Converter

Transfer Box

Brake Pump

Steer Pumps

Front Pump Drive

Implement Pumps

Transmission

Final Drive

Power Train

Hydraulics

Engine

Pilot PumpLube Pump

Steer CoolingPump

Transmission

Supplemental SteerPump

Brake CoolingPump

Pump

I-2

5 Modules

AFTERCOOLER

ImplementHydraulicSystem

BrakeHydraulicSystem

Power TrainHydraulicSystem

SteerHydraulicSystem

STAT STATWaterPumps

994 WHEEL LOADERCOOLING SYSTEM

3516

3 Modules 6 Modules 22 Modules

EngineOil

I-3

EEF NEEF

ENGINE END FRAME NON ENGINE END FRAME

ENGINE

BRAKES STEERING SUPPLEMENTALSTEERING

LUBE FRONTPUMP DRIVE IMPLEMENTS

IMPLEMENTS

IMPLEMENTSIMPLEMENTCOOLINGPILOT

BRAKECOOLINGSTEERING

STEERINGCOOLING

PUMPS LOCATION

I-4

I-5

EMS Test at 101-7435 Harness Plug

8C3508

CONTROLS

WARNING LIGHT

SOUND ALARM

INPUT TRANSFER GEAR

YOKE

PLANETARYCARRIER

SUN GEAR

RING GEAR

TRANSMISIONINPUT SHAFT

HOUSING

2

TRANSMISSION INPUT SHAFT

TRANSMISSION OUTPUT SHAFT

HUB

NO. 5 CLUTCH

NO. 4 CLUTCHNO. 3 CLUTCH NO. 2 CLUTCH

NO. 1 CLUTCH

NO. 2 PLANETARY CARRIER

NO. 4 PLANETARYCARRIER NO. 3 PLANETARY CARRIER

NO. 1 PLANETARY CARRIER

NO. 1 RING GEAR

NO. 2 RING GEAR

NO. 3 RING GEAR

NO. 4 RING GEAR

OUTPUT TRANSFER GEAR

IDLER GEAR

DUAL IDLER GEARS

OUTPUT SHAFT

NO. 1 PLANETARY GEARS




NO. 1 SUN GEAR

NO. 2 SUN GEAR

NO. 3 SUN GEARNO. 4 SUN GEAR

TRANSMISSION AND TRANSFER GEARS

3

SPEEDCLUTCHESENGAGED

NEUTRAL

FIRST FORWARD

SECOND FORWARD

THIRD FORWARD

FIRST REVERSE

SECOND REVERSE

THIRD REVERSE

3

2 and 5

2 and 4

2 and 3

1 and 5

1 and 4

1 and 3

CLUTCHENGAGEMENT CHART

4

SEPARATORPLATES

TOPARKINGBRAKE

CONTROLVALVE

PRESSUREPLATE

SPRINGS

DRIVESHAFT

BRAKE ENGAGED

MACHINEFRAME

DRIVESHAFT

FROMPARKINGBRAKE

CONTROLVALVE

SEPARATORPLATES

DISCS

BRAKERELEASEPISTON

RODS

BRAKE RELEASED

PARKING BRAKE

5

OUTER SUN GEAR

INNER SUN GEAR

OUTER PLANETARYGEAR

OUTER PLANETARYCARRIER

WHEEL HUB

RIM

INNER PLANETARYCARRIER

INNER RING GEAR

OUTER RING GEAR

INNER PLANETARYGEAR

BRAKE

AXLE SHAFT

FINAL DRIVE AND BRAKE

6

TORQUECONVERTER

PUMP

DRIVE

TRANSMISSION

994 WHEEL LOADERPOWER TRAIN

HYDRAULIC SYSTEM

PUMPS

FILTERS

LOCKUPCLUTCH

BRAKENEUTRALIZER

VALVE

T/COUTLETRELIEFVALVE

POWER TRAINOIL COOLER

P1P2

OUTPUTTRANSFERBEARING

LUCSOLENOID

ICSOLENOID

IMPELLERCLUTCH

PRIORITYVALVE

INPUTTRANSFER

GEAR3516 ENGINE

TRANSCONTROL

VALVE

OUTPUTTRANSFER

GEAR

7

21

3

45

FROMPUMP

TO TORQUECONVERTER

1 2 3

P2P1

P3

SPEED SELECTORSPOOL

MODULATINGRELIEF VALVE

LOADPISTON

CONVERTERRATIO VALVE

DIFFERENTIALVALVE

DIRECTIONALSELECTOR SPOOL

NEUTRALIZERVALVE

FLOW CONTROLORIFICE

SCREENEDORIFICE

LOAD PISTONDRAIN PASSAGE

TRANSMISSION CONTROL VALVE

R N F

B

A

8

2 13

45

BP3

P1P2

CA

D

G

FE

FROMPUMP

TOTORQUECONVERTER

1 2 3

R N F

TRANSMISSION CONTROLVALVENEUTRAL

9

21

3

45

FROMPUMP

TO TORQUECONVERTER

1 2 3

TRANSMISSION CONTROL VALVEFIRST SPEED FORWARD

P2P1

P3

R N F

10

21

3

45

FROMPUMP

TO TORQUECONVERTER

1 2 3

TRANSMISSION CONTROL VALVENEUTRALIZER VALVE DEPRESSED

P2

P1

P3

R N F

FROMBRAKEVALVE

11

21

3

45

FROMPUMP

TO TORQUECONVERTER

1 2 3

TRANSMISSION CONTROL VALVEENGINE STARTED WITH SELECTOR IN GEAR

P2

P1

P3

A

R N F

12

IMPELLER CLUTCHTORQUE CONVERTER

HOUSING

LOCKUP CLUTCH

TURBINE

IMPELLER

IMPELLER CLUTCH

STATOR

13

SCREENTANK

LOCKUP CLUTCHSOLENOID VALVE

IMPELLER CLUTCHSOLENOID VALVE

OUTLETRELIEF VALVE

TORQUECONVERTER

LOCKUPCLUTCH

FILTER FILTER

TWO SECTIONPUMP

PRIORITYVALVE

IMPELLERCLUTCH

TRANSMISSIONCONTROL VALVE

INPUTTRANSFER

GEAR

COOLER

PUMP DRIVE

OUTPUT TRANSFERBEARING

OUTPUT TRANSFERGEAR

TRANSMISSION

TORQUE CONVERTER HYDRAULIC SYSTEMTORQUE CONVERTER DRIVE

14

SCREEN

TANK



OUTLETRELIEFVALVE

TORQUECONVERTER

LOCKUPCLUTCH

FILTER FILTER

TWO SECTIONPUMP

PRIORITYVALVE

IMPELLERCLUTCH


INPUTTRANSFER

GEAR

COOLER

PUMP DRIVE


OUTPUT TRANSFERGEAR

TRANSMISSION

TORQUE CONVERTER HYDRAULIC SYSTEMDIRECT DRIVE

15

SCREEN

TANK



OUTLETRELIEF VALVE

TORQUECONVERTER

LOCKUPCLUTCH

FILTER FILTER

TWO SECTIONPUMP

PRIORITYVALVE

IMPELLERCLUTCH


INPUTTRANSFER

GEAR

COOLER

PUMP DRIVE


OUTPUT TRANSFERGEAR

TRANSMISSION

TORQUE CONVERTER HYDRAULIC SYSTEM TRANSMISSION SHIFT

16

1 2 39 4 5 10 23 27 19 22 6 12 35 13 15 18 17 16 20 14 21 7 11 24 25 8 9 28 29 30 31 32 33 34 26 3 40 36 38 37

BA

TT

ER

Y+

GR

OU

ND

SO

L R

ET

UR

N

XM

SN

OU

T S

PD

IMP

LR S

OL

XM

SN

NE

UT

SW

IMP

LR P

RE

SS

TC

OU

T S

PD

LUC

SO

L

CA

T D

AT

A L

INK

+C

AT

DA

TA

LIN

K -

SE

RV

ICE

SW

ER

AS

E S

W

LUC

EN

AB

LEP

2 P

RE

SS

SN

SR

PW

R +

8V

ABC1

2

ABC

ABC

12 1

2

CBA

TRANSMISSIONNEUTRAL SWITCH

TORQUE CONVERTERLOCKUP SWITCH

LOCKUP CLUTCHSOLENOID

CONVERTER OUTPUTSPEED SENSOR

TRANSMISSIONOUTPUT

SPEED SENSOR

TRANSMISSION P2PRESSURE SENSOR

IMPELLERCLUTCH

SOLENOID

710

709

975

D724

E705

E704

709

202

409

202

D725

975

202

452

709

TO OPERATORMONITOR 2

452

9164

3

2

1

202

123

3

1

6

4

2

5

123

202

815

GROUND

SIGNAL

GROUND

SIGNAL

SIGNAL

GROUND

+V+V

+V

ELECTRONICTORQUE

CONVERTERCONTROL

975

710

D72

4

E70

4

E70

5

452

D72

5

916

815

709

24V

709

202

TO CONVERTERLAMPIMPELLER

CLUTCHPRESSURE

SENSOR

GROUNDSIGNAL

+V

17

1 2 39 4 5 10 23 27 19 22 6 12 35 13 15 18 17 16 20 14 21 7 11 24 25 8 9 28 29 30 31 32 33 34 26 3 40 36 38 37

BA

TT

ER

Y+

GR

OU

ND

SO

L R

ET

UR

N

XM

SN

OU

T S

PD

IMP

LR S

OL

XM

SN

NE

UT

SW

IMP

LR P

RE

SS

TC

OU

T S

PD

LUC

SO

L

CA

T D

AT

A L

INK

+C

AT

DA

TA

LIN

K -

SE

RV

ICE

SW

ER

AS

E S

W

LUC

EN

AB

LEP

2 P

RE

SS

SN

SR

PW

R +

8V

12

ABC

ELECTRONIC TORQUE CONVERTERCONTROL

AND TORQUE CONVERTER HYDRAULICSYSTEMS

TRANSMISSION IN NEUTRALLOCKUP CLUTCH ENABLE SWITCH

OFF

SCREEN

TANK




TRANSMISSION OUTPUTSPEED SENSOR

TRANSMISSION P2PRESSURESENSOR



TO CONVERTERLAMP

LOCKUP CLUTCHENABLE SWITCH

OUTLETRELIEF VALVE

TORQUECONVERTER

LOCKUPCLUTCH

FILTER

FILTER

TWO SECTIONPUMP

PRIORITYVALVE

IMPELLERCLUTCH


INPUTTRANSFER

GEAR

COOLER

PUMP DRIVE


OUTPUT TRANSFERGEAR

TRANSMISSION

ETCCCONNECTOR

IMPELLER CLUTCHPRESSURE SENSOR

ABC

CBA

ABC

GROUNDSIGNAL

GROUNDSIGNAL

SIGNALGROUND+V

+V

+V

GROUNDSIGNAL

+V

4321

3164

2

5

12

21

975

710

D72

4

E70

4

E70

5

452

D72

5

916

815

709

710

709

E705

E704

709

202

409

202

975

D724

D725

975

815

709

202

202

452

709

452

916

202

123123

202

24V

18

1 2 39 4 5 10 23 27 19 22 6 12 35 13 15 18 17 16 20 14 21 7 11 24 25 8 9 28 29 30 31 32 33 34 26 3 40 36 38 37

BA

TT

ER

Y+

GR

OU

ND

SO

L R

ET

UR

N

XM

SN

OU

T S

PD

IMP

LR S

OL

XM

SN

NE

UT

SW

IMP

LR P

RE

SS

TC

OU

T S

PD

LUC

SO

L

CA

T D

AT

A L

INK

+C

AT

DA

TA

LIN

K -

SE

RV

ICE

SW

ER

AS

E S

W

LUC

EN

AB

LEP

2 P

RE

SS

SN

SR

PW

R +

8V

TANK

GROUNDSIGNAL

GROUNDSIGNAL

SIGNALGROUND+V

+V

+V

GROUNDSIGNAL

+V

CBA

ABC

12

21

4321

31

64

2

5

975

710

D72

4

E70

4

E70

5

452

D72

5

916

815

709

710

709

E705

E704

709

202

409

202

975

D724

D725

975

815

709

202

202

452

709

452

916

202

123

123

202

24V

ABC

ELECTRONIC TORQUE CONVERTER CONTROLAND TORQUE CONVERTER HYDRAULIC SYSTEMS

THE INSTANT A SHIFT IS MADE

SCREEN

TRANSMISSIONNEUTRAL SWITCH LOCKUP CLUTCH

SOLENOID VALVE






TO CONVERTERLAMP


OUTLETRELIEFVALVE

TORQUECONVERTER

LOCKUPCLUTCH

FILTERFILTER

TWO SECTIONPUMP

PRIORITYVALVE

IMPELLERCLUTCH


INPUTTRANSFER

GEAR

COOLER

PUMP DRIVE


OUTPUT TRANSFERGEAR

TRANSMISSION

ETCCCONNECTOR


ABC

12

19

1 2 39 4 5 10 23 27 19 22 6 12 35 13 15 18 17 16 20 14 21 7 11 24 25 8 9 28 29 30 31 32 33 34 26 3 40 36 38 37

BA

TT

ER

Y+

GR

OU

ND

SO

L R

ET

UR

N

XM

SN

OU

T S

PD

IMP

LR S

OL

XM

SN

NE

UT

SW

IMP

LR P

RE

SS

TC

OU

T S

PD

LUC

SO

L

CA

T D

AT

A L

INK

+C

AT

DA

TA

LIN

K -

SE

RV

ICE

SW

ER

AS

E S

W

LUC

EN

AB

LEP

2 P

RE

SS

SN

SR

PW

R +

8V


TORQUER CONVERTER DRIVE

12

ABC

SCREEN

TANK








TO CONVERTERLAMP


OUTLETRELIEF VALVE

TORQUECONVERTER

LOCKUPCLUTCH

FILTER

FILTER

TWO SECTIONPUMP

PRIORITYVALVE

IMPELLERCLUTCH


INPUTTRANSFER

GEAR

COOLER

PUMP DRIVE


OUTPUT TRANSFERGEAR

TRANSMISSION

ETCCCONNECTOR


ABC

CBA

ABC

GROUNDSIGNAL

GROUNDSIGNAL

SIGNALGROUND+V

+V

+V

GROUNDSIGNAL

+V

4321

3164

2

5

12

21

975

710

D72

4

E70

4

E70

5

452

D72

5

916

815

709

710

709

E705

E704

709

202

409

202

975

D724

D725

975

815

709

202

202

452

709

452

916

202

123123

202

24V

20

1 2 39 4 5 10 23 27 19 22 6 12 35 13 15 18 17 16 20 14 21 7 11 24 25 8 9 28 29 30 31 32 33 34 26 3 40 36 38 37

BA

TT

ER

Y+

GR

OU

ND

SO

L R

ET

UR

N

XM

SN

OU

T S

PD

IMP

LR S

OL

XM

SN

NE

UT

SW

IMP

LR P

RE

SS

TC

OU

T S

PD

LUC

SO

L

CA

T D

AT

A L

INK

+C

AT

DA

TA

LIN

K -

SE

RV

ICE

SW

ER

AS

E S

W

LUC

EN

AB

LEP

2 P

RE

SS

SN

SR

PW

R +

8V


DIRECT DRIVE

12

ABC

SCREEN

TANK








TO CONVERTERLAMP


OUTLETRELIEF VALVE

TORQUECONVERTER

LOCKUPCLUTCH

FILTER

FILTER

TWO SECTIONPUMP

PRIORITYVALVE

IMPELLERCLUTCH


INPUTTRANSFER

GEAR

COOLER

PUMP DRIVE


OUTPUT TRANSFERGEAR

TRANSMISSION

ETCCCONNECTOR


ABC

CBA

ABC

GROUNDSIGNAL

GROUNDSIGNAL

SIGNALGROUND+V

+V

+V

GROUNDSIGNAL

+V

4321

3164

2

5

12

21

975

710

D72

4

E70

4

E70

5

452

D72

5

916

815

709

710

709

E705

E704

709

202

409

202

975

D724

D725

975

815

709

202

202

452

709

452

916

202

123123

202

24V

21

POWERINDICATOR

THREE DIGIT DISPLAY

NORMAL MODE

ELECTRONIC CONTROL MODULE

POWERINDICATOR

FAULTPRESENT

INDICATOR

206

CID

FAULT DETECTION

POWERINDICATOR

FAULTPRESENT

INDICATOR

00F

FMI

22


POWERINDICATOR

0

CHANGE MODES

1

SERVICE MODEINDICATOR

NORMAL MODE SERVICE MODE

OPERATIONAL MODENUMBERS

23

21C

CIDPOWER

INDICATOR

FAULTPRESENT

INDICATOR

SERVICEMODE

INDICATOR

POWERINDICATOR

FAULTPRESENT

INDICATOR

206 00F

POWERINDICATOR

FAULTPRESENT

INDICATOR

FMI POWERINDICATOR

FAULTPRESENT

INDICATOR

OID


(SERVICE MODE)

206 00F 21C

SERVICEMODE

INDICATOR

SERVICEMODE

INDICATOR

SERVICEMODE

INDICATOR

CID

POWERINDICATOR

FAULTPRESENT

INDICATOR

SERVICEMODE

INDICATOR

POWERINDICATOR

FAULTPRESENT

INDICATOR

SERVICEMODE

INDICATOR

FMI OID

MODE 1

24

2 9 5

IMPELLER CLUTCHPRESSURE

POWERINDICATOR

MODE 2ELECTRONIC CONTROL MODULE

4 5

IMPELLER CLUTCHPRESSURE

POWERINDICATOR

FAULT PRESENTINDICATOR


(IMPELLER CLUTCH PRESSURE)

25

(TRANSMISSION P2 PRESSURE)

3 1 5

TRANSMISSION P2PRESSURE

POWERINDICATOR


4 5

TRANSMISSION P2PRESSURE

POWERINDICATOR



26

( TORQUE CONVERTOR OUTPUT SPEED)

1 1 5

TORQUE CONVERTEROUTPUT SPEED

POWERINDICATOR


0

TORQUE CONVERTEROUTPUT SPEED

POWERINDICATOR



27

(TRANSMISSION OUTPUT SPEED)

1 1 5

TRANSMISSIONOUTPUT SPEED

POWERINDICATOR


0

TRANSMISSIONOUTPUT SPEED

POWERINDICATOR



28

(SWITCH STATUS)MODE 6


NEUTRAL SWITCHINPUT

LOCKUP SWITCHINPUT

DECIMALPOINT

29

30

TRANSMISSION OILFILTER

TORQUE CON-VERTER OIL FIL-

TER

PUMP PRESSURETAP

31IMPELLER CLUTCHPRESSURE SENSOR

LOCKUP CLUTCHPRESSURE TAP



TORQUE CONVERT-ER OUTLET RELIEF

VALVE

TORQUE CONVERT-ER OUTPUT SPEED

SENSOR

IMPELLER CLUTCHPRESSURE TAP

PRIORITY VALVE

32

NEUTRALIZER VALVECONNECTION P1 PRESSURE

TAP

P2 PRESSURE TAPCONTROL VALVE

COVERTORQUE CON-VERTER INLET

PRESSURE

IMPLEMENT HYDRAULIC SYSTEM

IMPLEMENT PUMPS

MAIN SYSTEM COOLING SYSTEMPILOT SYSTEM

PILOT PUMP

MAIN RELIEF VALVES

MAIN CONTROL VALVES

PILOT RELIEF VALVEPILOT FILTER

PILOT CONTROL VALVEIMPLEMENT OIL COOLING PUMP

IMPLEMENTOIL TANK

COOLINGOIL FILTER

IMPLEMENTOIL COOLERS

LIFTCYLINDERS

TILTCYLINDERS

III-2

TILT LIFT

PILOT RELIEFVALVE

PILOTFILTER

PILOTPUMP

PILOT CONTROLVALVES

CHECKVALVE

CHECKVALVE

SELECTOR AND PRESSURECONTROL VALVE

TO LIFTCONTROLVALVES

IMPLEMENT PILOT SYSTEM

FROMLIFT CYLINDERS

TO TILTCONTROLVALVES

IMPLEMENTHYDRAULIC TANK

III-3

ADJUSTERCAP

LOCKNUT

PILOT VALVE PILOTSPRING

RELIEF VALVESPRING CHAMBER

RELIEFVALVE

RETURN TOCOOLING CIRCUIT

RETURNTO TANK

RETURNTO TANK

RETURN TOCOOLING CIRCUIT

PILOT RELIEF VALVE

FROMPILOTPUMP

III-4

DRAINPASSAGE

SHIMS

SPRING

ORIFICE

FROM LIFTCYLINDERS

VALVE SPOOL

TO CHECK VALVE

SELECTOR AND PRESSURE CONTROL VALVE

III-5

TILT

PILOT CONTROL VALVE

TILT BACKHOLDDUMP

RAISE

LOWERFLOAT

HOLD

TO TANK

FROMPUMP

FROMMAKEUP VALVE

LIFT

TO LIFTCONTROL VALVE

TO TILTCONTROL VALVE

HOLD POSITION

III-6

PILOT CONTROL VALVE

TILT BACKHOLDDUMP

RAISE

LOWERFLOAT

HOLD

TO TANK

FROMPUMP

FROMMAKEUP VALVE



FROM TILTCONTROL VALVE

THROTTLING SLOTS

THROTTLING SLOT

TILT BACK

III-7

TILT BACKHOLDDUMP

RAISE

LOWERFLOAT

HOLD

FROM LIFTCONTROL VALVE

PILOT CONTROL VALVE

TO TANK

FROMPUMP

FROMMAKEUP VALVE


LOWER

III-8

TILT BACKHOLDDUMP

RAISE

LOWERFLOAT

HOLD

PILOT CONTROL VALVE

TO TANK

FROMPUMP

FROMMAKEUP VALVE



FLOAT

III-9

IMPLEMENTHYDRAULIC TANK

LEFT MAINCONTROL VALVE

RIGHT MAINCONTROL VALVE

RIGHTIMPLEMENT

PUMP

LEFTIMPLEMENT

PUMP

CENTERIMPLEMENT

PUMP

RELIEFVALVE

RELIEFVALVE

RELIEFVALVE


III-10

FROM PUMP

TO TANK

VALVE SPRINGS

ROD END

HEAD END

LOAD CHECK VALVE

FROM PILOTCONTROL VALVE

ROD END

HEAD END

FROM PUMP




994 WHEEL LOADERMAIN CONTROL VALVE

HOLD

TILT DUMP

LIFTLOWER

ATTACHMENT

III-11

ROD END

HEADEND

RODEND

HEAD END

DUMP TILT

LIFTLOWER

FROM PUMP

TO TANK

FROMPUMP

VALVE

CYLINDEROIL

TO TANK FROM TANK

CYLINDEROIL

LINE RELIEFFUNCTION

MAKEUPFUNCTION

ORIFICE

PILOTVALVE

LINE RELIEF AND MAKEUP VALVE

III-12

LIFTLOWER

ROD END

HEAD ENDROD END

HEAD END

DUMP TILT

FROM PUMP

TO TANK

FROMPUMP

CYLINDEROIL

FROM TANK

MAKEUP AND VENT VALVE

CYLINDEROIL

TO TANK

TO PILOT CONTROLVALVE

III-13

AUX

TILT

LIFT

AUX

TILT

LIFT

MAIN CONTROL VALVE

FILTERCOOLING

PUMP

OILCOOLERS

PILOT CONTROLVALVE

TILT LIFT

MAINPUMPS

MAINRELIEFVALVES

PILOTRELIEFVALVE

FLUIDSAMPLING

MAIN CONTROL VALVE

TILT LIFT

HOLD


COOLER BYPASSRELIEF VALVE

COOLER BYPASSVALVE

SELECTOR ANDPRESSURE CONTROL

VALVE

III-14

MAIN CONTROL VALVE

PILOT CONTROLVALVE

MAIN CONTROL VALVE


SELECTOR ANDPRESSURE REDUCING

VALVE

TILT LIFT

TILT BACK

TILT LIFT

AUX

TILT

LIFT

AUX

TILT

LIFT

COOLINGPUMP

MAINPUMPS

MAINRELIEFVALVES

PILOTRELIEFVALVE


COOLER BYPASSVALVE

OIL COOLERS

FILTER

III-15

AUX

TILT

LIFT

AUX

TILT

LIFT

MAIN CONTROL VALVE

COOLINGPUMP

PILOT CONTROLVALVE

MAINPUMPS

MAINRELIEFVALVES

PILOTRELIEFVALVE

MAIN CONTROL VALVE

TILT LIFT

BUCKET LOWER



COOLER BYPASSVALVE

OIL COOLERS


VALVE

FILTER

TILT LIFT

III-16

AUX

TILT

LIFT

AUX

TILT

LIFT

MAIN CONTROL VALVE

PILOT CONTROLVALVE

MAINPUMPS

MAINRELIEFVALVES

PILOTRELIEFVALVE

MAIN CONTROL VALVE

TILT LIFT

BUCKET FLOAT



COOLER BYPASSALVE


VALVE

COOLINGPUMP

TILT LIFT

III-17

AUX

TILT

LIFT

AUX

TILT

LIFT

MAIN CONTROL VALVE

COOLER BYPASSVALVE


COOLINGPUMP

OILCOOLERS

PILOT CONTROLVALVE

TILT LIFT

MAINPUMPS

MAINRELIEFVALVES

PILOTRELIEFVALVE

TILT LIFT

LOWER ENGINE OFF



VALVE

FILTER

MAIN CONTROL VALVE

III-18

COOLER BYPASSVALVE


TANK

FILTER

COOLINGPUMP

OILCOOLERS

FROM PILOTRELIEF VALVE

IMPLEMENT OIL COOLING SYSTEMIII-19

III-20

BRAKE COOLINGOIL TANK

STEERING AND BRAKEOIL TANK

STEERING OIL FILTERCOOLING OIL FILTER

762

128200

1

2

34

306

200

762

761

24 V

R C S BS

T

OF

FO

N

24 V

105 762

10 A

213

1 2

STARTSWITCH

TO LIFTKICKOUT

SOLENOID

KICKOUTCONTROL

PILOT CONTROLVALVE

TILT CONTROLLEVER

BUCKET KICKOUTSOLENOID

BUCKET KICKOUT

BUCKET KICKOUTSWITCH

INDICATORS

MAGNET

INDICATORS

GREEN - POWER TO SWITCHAMBER - POWER TO SOLENOID

III-21

761

128200

1

2

34

306

200

762

761

24 V

PILOT CONTROLVALVE

R C S BS

T

OF

FO

N

24 V

105 761

10 A

321

STARTSWITCH

TO BUCKETKICKOUT

KICKOUTCONTROL

LIFT CONTROLLEVER

LIFT KICKOUTSOLENOID

LIFT KICKOUT

LIFT KICKOUTSWITCH

MAGNET

INDICATORS

GREEN - POWER TO SWITCHAMBER - POWER TO SOLENOID

INDICATORS

III-22

AIR RESERVOIR

DRAIN VALVE

AUXILIARY AIRRECEPTACLE

COMPRESSOR

AIRDRYER

GOVERNOR

PRESSURESWITCH

RELIEFVALVE

HORN HORN

TO AUTOLUBE SYSTEM

TO AIR STARTCONTROL VALVE

AIRPRESSURE

GAUGE

TO AIR STARTRELAY VALVE

HORN SOLENOIDVALVE

HORN SOLENOIDVALVE

TOATMOSPHERE

TO GOVERNORCONTROL SYSTEM

MANIFOLDCHECKVALVE

AIR SYSTEM

ATMOSPHERICPRESSURE

SYSTEM AIRPRESSURE

IV-2

OUTLET PORT

GOVERNORUNLOADER PISTONS

OUTLET VALVES

INLET VALVES

AIR INLET

AIR COMPRESSORCHARGING

IV-3

AIR OUTLET

GOVERNOR

UNLOADER PISTONS

OUTLET VALVES

INLET VALVES

AIR INLET

AIR COMPRESSORUNLOADED

IV-4

PRESSURESETTINGSPRING

EXHAUST STEM

INLET ANDEXHAUST

VALVE

PISTON

CUT-IN POSITION

ADJUSTMENT SCREW

FROMAIR RESERVOIRS

AIR COMPRESSOR GOVERNOR

CUT-OUT POSITION

TO AIR COMPRESSORUNLOADER PISTONSAND AIR DRYERPURGE VALVE

FROM AIR COMPRESSORUNLOADER PISTONSAND AIR DRYERPURGE VALVE

EXHAUSTPORT

IV-5

STARTERMOTOR

RELAYVALVE

DRIVE PINION

STARTERCONTROL VALVE

AIR RESERVOIR

VALVE

SPRING

AIR START SYSTEM

STARTER CONTROL VALVE SOLENOID DE-ENERGIZED

IV-6

STARTERMOTOR

RELAYVALVE

DRIVE PINION

STARTERCONTROL VALVE

AIR RESERVOIR

AIR START SYSTEMSTARTER CONTROL VALVE SOLENOID ENERGIZED

SOCKET

IV-7

PISTONROTORVANES

DRIVEPINION

PISTONSPRING

DRIVESHAFT

ROTORGEAR

PINIONGEAR

AIR INLET

AIR EXHAUST

STARTING MOTOR

AIROUTLET

AIRINLET

IV-8

JUNCTIONTO GOVERNOR

CONTROL VALVE

REGULATOR

AUTO LUBE PUMP

AUTO LUBECONTROL VALVE

AIR RESERVOIR

VENT VALVE

CHECKVALVE

INJECTORS

LUBETANK

UNLOADER

AUTO LUBE SYSTEMOFF CYCLE

IV-9

JUNCTIONTO GOVERNOR

CONTROL VALVE

REGULATOR

AUTO LUBE PUMP


AUTO LUBE SYSTEMON CYCLE

AIR RESERVOIR

VENT VALVE

CHECKVALVE

INJECTORS

LUBETANK

UNLOADER

VENT HOSE

IV-10

JUNCTIONTO GOVERNOR

CONTROL VALVE

REGULATOR

AUTO LUBE PUMP


AIR RESERVOIR

VENT VALVE

CHECKVALVE

INJECTORS

LUBETANK

UNLOADER

VENT HOSE

AUTO LUBE SYSTEMINSTANT CONTROL VALVE SHUTS OFF

IV-11

IV-12

REGULATOR VENT VALVE UNLOADER PUMP

AUTO LUBE CONTROLVALVE

VENT HOSE LUBE HOSE CHECK VALVE TANK

TOBEARING

FROMLUBRICATION

PUMP

LUBE INJECTOR

STAGE 1SPRINGINJECTOR

PISTON SLIDE VALVE

TOBEARING

FROMLUBRICATION

PUMP

STAGE 2

INTERNALPASSAGE

MEASURINGCHAMBER

DISCHARGECHAMBER

IV-13

TOBEARING

FROMLUBRICATION

PUMP

LUBE INJECTORSTAGE 3

SPRINGINJECTORPISTON

DISCHARGECHAMBER

TOBEARING

FROMLUBRICATION

PUMP

STAGE 4

SLIDE VALVE

MEASURINGCHAMBER

DISCHARGECHAMBER

ADJUSTMENTCAP

PISTONROD

INTERNALPASSAGE

IV-14

STEERINGCYLINDER

STEERINGHYDRAULIC

TANK

STEERINGCOOLERS

STEERINGCOOLING

PUMPSTEERINGCONTROL

VALVE

STEERINGPUMPS

COMPENSATORVALVE GROUP

PRESSUREREDUCING

VALVES

NEUTRALIZERVALVES

METERINGPUMP

STEERINGFILTER

SUPPLEMENTALSTEERING

PUMP

DIVERTERVALVE

994 WHEEL LOADERSTEERING SYSTEM

V-2

V-3COMPONENTS

BRAKE OILCOOLING

TANK

IMPLEMENTOIL COOL-ING FILTER

STEERINGAND BRAKE

COOLINGFILTER

STEERINGAND BRAKE

OIL TANK

V-4PUMP COMPONENTS

RIGHTSTEERING

PUMP

LEFTSTEERING

PUMP

BRAKECOOLING

PUMP

PUMPCOMPENSATOR

PUMPCOMPENSATOR

SWASHPLATE

LARGEACTUATOR

PISTON

STEERING PUMP ANDCOMPENSATOR VALVE

LOW PRESSURE STANDBY

FROM STEERINGCONTROL VALVE

FLOWCOMPENSATORSPOOL

PRESSURECOMPENSATORSPOOL

CONPENSATOR VALVE

SMALLACTUATOR PISTON

MINIMUM ANGLESTOP

MAXIMUM ANGLESTOP

CHARGEPUMP

V-5

SWASHPLATE

LARGEACTUATOR

PISTON


UPSTROKE




CONPENSATOR VALVE


MINIMUM ANGLESTOP

MAXIMUM ANGLESTOP

CHARGEPUMP

V-6

SWASHPLATE

LARGEACTUATOR

PISTON


CONSTANT FLOW




CONPENSATOR VALVE


MINIMUM ANGLESTOP

MAXIMUM ANGLESTOP

CHARGEPUMP

V-7

SWASHPLATE

LARGEACTUATOR

PISTON


DESTROKE




CONPENSATOR VALVE


MINIMUM ANGLESTOP

MAXIMUM ANGLESTOP

CHARGEPUMP

V-8

SWASHPLATE

LARGEACTUATOR

PISTON


RELIEF




CONPENSATOR VALVE


MINIMUM ANGLESTOP

MAXIMUM ANGLESTOP

CHARGEPUMP

V-9

ORIFICE 2

FROM RIGHTSTEERING PUMP

DRAIN PASSAGE

SHIMS

FROM LEFTSTEERING PUMP

ANDSUPPLEMENTAL

STEERING VALVE

TO HMUSTEERING OIL

PRESSURESWITCH

VALVE SPOOL

ORIFICE 1

VALVE 1VALVE 2

SELECTOR AND PRESSURE CONTROL VALVESV-10

L R PT

CONTROLSECTION

SLEEVE

SPOOL

DRIVEPIN THERMAL BLEEDPASSAGES

CENTERINGSPRINGS

METERINGSECTION

ROTOR

STATOR

HAND METERING UNITNEUTRAL

V-11

L R PT

L R PT

HAND METERING UNIT

METERINGSECTION

CONTROLSECTION

SPOOL

ROTOR

STATOR

CENTERINGSPRINGS

LEFT TURN

SLEEVEDRIVEPIN

RIGHT TURN

V-12

TOSTEERINGCONTROL

VALVEFROM HMU

CHECK VALVE

SPRINGVALVE SPOOL

FROMSTEERINGCONTROL

VALVETO HMU

CHECKVALVE

SPRING

VALVE SPOOL

NEUTRALIZER VALVE

LESS THAN MAXIMUM TURN

MAXIMUM TURN

V-13

STEERING CONTROL VALVEHOLD

CONTROLSPOOL

RELIEF VALVE

DOUBLE CHECK VALVE

SIGNALPASSAGE

FROMHMU

FROMHMUTO STEERING

CYLINDERSTO STEERINGCYLINDERS

FROM STEERING PUMPS

V-14

STEERING CONTROL VALVE

RIGHT TURN

CONTROLSPOOL

RELIEFVALVE

DOUBLE CHECK VALVE

SIGNALPASSAGE

FROMHMU

FROMHMUTO STEERING

CYLINDERSFROM STEERING

CYLINDERS

TO TANK

FROM STEERING PUMPS

V-15

STEERING SYSTEMHOLD

STEERING AND BRAKE TANK

LEFTNEUTRALIZER

VALVE

RIGHTNEUTRALIZER

VALVE

HAND METERING UNIT

STEERINGCONTROL VALVE

STEERING CYLINDERS

LINERELIEFVALVES

RIGHT PUMP

RIGHT PUMP COMPENSATOR VALVE

PRESSURE ANDSELECTOR VALVES

CHECKVALVE

CHECKVALVE

LEFT PUMPCOMPENSATOR VALVE

CHECKVALVE

LEFT PUMP V-16

STEERING SYSTEMGRADUAL RIGHT TURN

STEERINGCYLINDERS

LINERELIEFVALVES

DOUBLECHECKVALVE

NEUTRALIZERVALVES

HANDMETERING

UNIT

PRESSUREAND

SELECTORVALVE 2

PRESSUREAND

SELECTORVALVE 1

RIGHT PUMPCOMPENSATOR

VALVE

LEFT PUMPCOMPENSATOR

VALVE

CHECKVALVE

CHECKVALVE

RIGHT PUMP

LEFT PUMP

STEERING ANDBRAKE TANK

RELIEFVALVE

V-17

STEERING SYSTEM WITH SUPPLEMENTAL STEERINGDIFFERENTIAL PRESSURE BELOW 1220 kPa (175 psi)

REVERSINGSPOOL INLET

CHECKVALVES

SUPPLEMENTALPUMP

FLOWCHECKVALVES

OUTLET CHECK VALVE

DIVERTERSPOOL RELIEF

VALVE

NEUTRALIZERVALVES

HANDMETERING

UNIT

PRESSUREAND

SELECTORVALVE 2

PRESSUREAND

SELECTORVALVE 1


VALVE


VALVE

RIGHT PUMP

LEFT PUMP


V-18

STEERING SYSTEM WITH SUPPLEMENTAL STEERING

REVERSINGSPOOL

INLETCHECKVALVES

SUPPLEMENTALPUMP

FLOWCHECKVALVES

OUTLET CHECK VALVE


VALVE

NEUTRALIZERVALVES

HANDMETERING

UNIT

PRESSUREAND

SELECTORVALVE 2

PRESSUREAND

SELECTORVALVE 1


VALVE


VALVE

RIGHT PUMP

LEFT PUMP


DIFFERENTIAL PRESSURE ABOVE 1220 kPa (175 psi)

V-19

STEERING SYSTEM WITH SUPPLEMENTAL STEERING

REVERSINGSPOOL

INLETCHECKVALVES

SUPPLEMENTALPUMP

FLOWCHECKVALVES

OUTLET CHECK VALVE


VALVE

NEUTRALIZERVALVES

HANDMETERING

UNIT

PRESSUREAND

SELECTORVALVE 2

PRESSUREAND

SELECTORVALVE 1


VALVE


VALVE

RIGHT PUMP

LEFT PUMP


ENGINE OFF

V-20

STEERING COOLING SYSTEM

STEERINGCOOLER

PUMP

FLUIDSAMPLING

VALVE

FILTERFILTER

BYPASSVALVE

OIL COOLER CORES

COOLERBYPASSVALVE

BREATHER


FILTER

V-21

V-22STEERING AND BRAKE OIL COOLERS

MODULES

MACHINERIGHTSIDE6 5 4

IMPLEMENT OIL COOLERS

MODULES 677 5 4

LEFTBRAKEPEDAL

RIGHT BRAKEPEDAL

RIGHT BRAKEVALVE

PARKING BRAKEVALVE

BRAKEACCUMULATORS

LEFT FRONTSERVICE BRAKE

LEFT REARSERVICE BRAKE

RIGHT FRONTSERVICE BRAKE

RIGHT REARSERVICE BRAKE

PARKINGBRAKE

BRAKE OILCOOLER CORE GROUP

BRAKECOOLING

PUMP

BREATHER

BREATHER

VARIABLEDISPLACEMENTPISTON PUMP

PRESSURECOMPENSATOR

VALVE

PUMPACTUATOR

STEERING AND BRAKETANK

BRAKE COOLINGTANK

PRESSURERELEASE SPOOL

MANUALSPOOL

NEUTRALIZER VALVE FROMTRANSMISSION

NEUTRALIZER VALVE BRAKE SYSTEMENGINE OFF

V-23

PUMP SERVO VALVE CONTROL PISTON

CONTROL PISTONPASSAGE

SPRING

SWASHPLATEPISTON ASSEMBLY

DRIVE SHAFT

BARREL

OUTLET PASSAGE

INLET PASSAGE

BRAKE PUMPLOW PRESSURE

V-24

FROM PUMPOUTLET

TO CONTROLPISTON

ADJUSTMENTBOLT

LOCKNUT PRESSURE COMPENSATOR SPOOL

FROM PUMPOUTLET

TO CONTROLPISTON

ADJUSTMENTBOLT

LOCKNUT PRESSURE COMPENSATOR SPOOL

LOW BRAKE SYSTEM PRESSURE HIGH BRAKE SYSTEM PRESSURE

PUMP SERVO VALVE

V-25

PUMP SERVO VALVE CONTROL PISTON

CONTROL PISTONPASSAGE

SPRING

SWASHPLATE

PISTON ASSEMBLY

DRIVE SHAFT

BARREL

OUTLET PASSAGE

INLET PASSAGE

BRAKE PUMPHIGH PRESSURE

V-26

BRAKERELEASED

BRAKE CONTROLVALVE

PLUNGERSPRINGSSPOOL

PISTON SPRING

SUPPLYOIL

TOTANK

CHECK VALVE

TO SERVICE BRAKES ANDNEUTRALIZER VALVE

BRAKEENGAGED

PLUNGERSPRINGSSPOOL

PISTON

CHECKVALVE

SPRING

SUPPLYOIL

TOTANK

TO SERVICE BRAKESAND

NEUTRALIZER VALVE

V-27

TO DRAIN

TO TRANSMISSIONNEUTRALIZER VALVE

FROM BRAKECONTROL VALVE

TO BRAKE CONTROL VALVE

MANUALSPOOL

PRESSURERELEASE

SPOOL

TO DRAIN

FROM TRANSMISSIONNEUTRALIZER VALVE

FROM SERVICE VALVE

FROM BRAKE CONTROL VALVE

PRESSURERELEASE

SPOOL

MANUALSPOOL

TRANSMISSION ENGAGEDBRAKES SLOWLY DISENGAGED

LEFT BRAKE PEDAL RELEASEDTRANSMISSION DISENGAGED

BRAKES ENGAGED

LEFT BRAKE PEDAL DEPRESSED

NEUTRALIZER VALVES V-28

DISC-TYPE

SPINDLE

PLATES

DISCS

PISTON

SPRINGS

OIL CHAMBER

WHEEL ASSEMBLY

HOUSING

WHEEL BRAKE

V-29

SEPARATOR PLATESDISCS

TOPARKINGBRAKE

CONTROLVALVE

PRESSUREPLATE

SPRINGS

DRIVESHAFT

RODS

BRAKE ENGAGED

MACHINEFRAME

DRIVE SHAFT

FROMPARKINGBRAKE

CONTROLVALVE

BRAKE RELEASEPISTON

SPRINGS

BRAKE RELEASED

PARKING BRAKEV-30

BRAKE SYSTEM

LEFTBRAKEPEDAL

RIGHT BRAKEPEDAL

RIGHT BRAKEVALVE

PARKING BRAKEVALVE

BRAKEACCUMULATORS





PARKINGBRAKE


BRAKE COOLING PUMP

BREATHER

BREATHER


PRESSURECOMPENSATOR

VALVE

PUMPACTUATOR


BRAKE COOLINGTANK

FROMTRANSMISSION

NEUTRALIZER VALVEPRESSURE

RELEASE SPOOL

MANUALSPOOL

NEUTRALIZER VALVE

RIGHT BRAKE APPLIED

V-31

BRAKE SYSTEM

LEFTBRAKEPEDAL

RIGHT BRAKEPEDAL

RIGHT BRAKEVALVE

PARKING BRAKEVALVE

BRAKEACCUMULATORS





PARKINGBRAKE


BRAKE COOLING PUMP

BREATHER

BREATHER


PRESSURECOMPENSATOR

VALVE

PUMPACTUATOR


BRAKE COOLINGTANK

FROMTRANSMISSION


RELEASE SPOOL

MANUALSPOOL

NEUTRALIZER VALVE

LEFT BRAKE APPLIED

V-32

BRAKE SYSTEM

LEFTBRAKEPEDAL

RIGHT BRAKEPEDAL

RIGHT BRAKEVALVE

PARKING BRAKEVALVE

BRAKEACCUMULATORS





PARKINGBRAKE


BRAKE COOLING PUMP

BREATHER

BREATHER


PRESSURECOMPENSATOR

VALVE

PUMPACTUATOR


BRAKE COOLINGTANK

FROMTRANSMISSION


RELEASE SPOOL

MANUALSPOOL

NEUTRALIZER VALVE

INSTANT LEFT BRAKERELEASES

V-33

PUMP

BRAKE COOLING SYSTEM

OILCOOLER




COOLERBYPASSRELIEF

BRAKE COOLINGOIL TANK

BREATHER


V-34

V-35BRAKE OIL COOLER

HOSE TO REAR BRAKES HOSE TO FRONT BRAKES BRAKE OIL COOLER

COOLER BYPASS VALVE COOLER BYPASS HOSE

1

PAYLOAD MONITORING

OK0

1 2 34 5 6

7 8 9

ABCIDDEF

GHI JKL MNO

PRSTUV WXY

P1 P2 P3

SERVICELAMP

MESSAGE CENTERMODULE

KEYPADMODULE

LIFTCYLINDERPRESSURESENSORS

VIMSINTERFACE

MODULE

VIMSINTERFACE

MODULE

VIMSSERVICE TOOL

ANDSOFTWARE

PRINTER

DISPLAY DATA LINK

VIMSRS-232PORT

CAT DATA LINK

VITAL INFORMATIONMANAGEMENT SYSTEM

(VIMS)

KEYPADDATA LINK

VIMS MAIN MODULE

LIFTARM

POSITIONSENSORS

BROADCASTRS-232PORT

VI-2

BKT 0/32

ALERTINDICATOR

GAUGEPOSITION

AT 0% LOAD

MESSAGEAREA

MESSAGE CENTER

TRK 0/190TON 0%TON 0%

GAUGEPOSITION

AT 100% LOAD

GAUGEPOSITION

AT 115% LOAD

VI-3

OK

0

1 2 3

4 5 6

7 8 9

ABC

ID

DEF

GHI JKL MNO

PRS TUV WXY

F1 F2 F3

TO COMLETE ENTRIES

TO ENTER OPERATOR ID

TO SCROLL FOR AND BACK

TO DISPLAY PARAMETERS

TO DISPLAY INFORMATIONTO CLEAR LAST

NOT- STORED LOAD

TO DELAY PAYLOAD

KEYPAD VI-4

_994 cargador articulado

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