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Course Caterpillar d9r Bulldozer Track Type Tractor Engines Diagrams Components Systems Controls

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    D

    D9

    9R

    RT

    TR

    RA

    AC

    CK

    K-

    -T

    TY

    YP

    PE

    ET

    TR

    RA

    AC

    CT

    TO

    OR

    RS

    S

    2000 Caterpillar Inc.

    http://www.heavyequipments.org/

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    http://www.heavyequipments.org/http://www.heavyequipments.org/

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    D9R ENGINES

    3408 Engine with Mechanical Contro3408E Engine with HEUI

    http://www.heavyequipments.org/http://www.heavyequipments.org/

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    CHECK

    VALVE

    OIL PRESSURE

    SWITCH

    PRELUBRICATION STARTING SYSTEM

    GEAR

    PUMP

    SUCTION

    LINE

    STARTER

    MOTOR

    http://www.heavyequipments.org/http://www.heavyequipments.org/

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    KEY START

    SWITCH

    BATTERIES

    MAIN

    BREAKER

    R

    C

    S

    B ST

    OFF

    ON

    POS NEG POS NEG

    FRAME ENGINEALTERNATEBREAKER

    NEUTRAL SWITCH

    (DIFFERENTIALSTEER ONLY)

    PRELUBE

    TIMER/SOLENOID

    STARTER

    RELAY

    MAIN

    RELAY

    BUS BAR

    BUS BAR

    GS

    MOTOR

    MTRBAT

    337 WH

    307 OR

    200 BK447 PK

    301

    BU101

    RD

    RD 00

    BK 00

    GS

    MOTOR

    MTRBAT

    200 BK

    BK 00RD 00

    RD 00

    POS NEG POS NEGRD 00

    101

    RD

    RD 00

    306 GN

    306 GN 307 OR

    308 YL

    314 PURD 06

    RD

    06177 RD

    200 BK

    200 BK

    200 BK

    SECOND

    STARTER

    MOTOR

    AND RELAY

    STARTER

    MOTOR/

    PRELUBE

    PUMP

    OIL PRESSURE

    CUTOFF SWITCH

    PRELUBRICATION SYSTEM

    http://www.heavyequipments.org/http://www.heavyequipments.org/

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    ADEM IIELECTRONIC

    CONTROLMODULE

    (ECM) GROUNDBOLT

    15 AMPBREAKER

    MAINPOWER RELAY

    KEYSWITCH

    TURBO OUTLET PRESS. SENSOR

    SECONDARYSPEED/TIMING SENSOR

    PRIMARYSPEED/TIMING SENSOR

    HYDRAULICPRESSURE SENSOR

    24 V

    MACHINE

    INTERFACECONNECTOR

    ENGINE

    HARNESS

    PUMP CONTROL VALVE

    COOLANT TEMP. SENSOR

    ATMOSPHERIC PRESS. SENSOR

    OIL PRESSURE SENSOR

    HYDRAULIC TEMP. SENSOR

    FUEL TEMPERATURE SENSOR

    COOLANT FLOW SWITCH

    8 INJECTORS

    TDC SERVICE

    PROBE ACCESS

    CATERPILLAR

    MONITORING

    SYSTEM

    AUTO RETARDER CONTROL

    EPTC II TRANSMISSION CONTROL

    ELECTRONIC SERVICE TOOLCAT DATA LINK

    FAN

    FAN SPEED SENSOR

    FAN CONTROL VALVE

    TURBO INLET PRESSURE SENSOR

    THROTTLE BACK-UP, ELEVATED LOW IDLE

    AND GROUND LEVEL SHUTDOWN (2) SW

    THROTTLESENSOR ACCELERATOR

    PEDAL

    DISCONNECT SWITCH

    3408E HEUI SYSTEMCOMPONENT DIAGRAM

    MACHINE

    HARNESS

    http://www.heavyequipments.org/

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    AMOCS

    RADIATOR

    TORQUEDIVIDER

    FINAL DRIVES

    CLUTCH AND BRAKE SYSTEM

    IMPLEMENT PUMP

    DIFFERENTIAL STEER SYSTEM

    STEERING

    PUMP

    PTO PUMP

    (3-SECTION)

    QUICK-DROP

    VALVE

    T/C SCAVANGE

    PUMP

    PTO PUMP

    (4-SECTION)

    CONTROL VALVE

    STACK

    TRANSMISSION

    DIFFERENTIAL

    STEER

    PLANETARIES

    SERVICE BRAKES CLUTCH AND BRAKE PACKS

    CO

    V

    S

    IMP

    HYDRAULICMOTOR

    D9R COMPONENT LOCATIONS

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    TORQUE DIVIDER

    http://www.heavyequipments.org/

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    FREEWH

    STATO

    INLET

    PASSAGE

    CARRIER

    HOUSING

    TURBINE

    PLANET

    CARRIER

    STATOR

    OUTPUT

    SHAFT

    SUN GEAR

    PLANET

    GEARS

    ENGINE FLYWHEEL

    OUTLET

    PASSAGE

    IMPELLER

    C

    ROLLER

    SPRIN

    RING

    GEAR

    http://www.heavyequipments.org/

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    POWER SHIFT TRANSMISSION

    http://www.heavyequipments.org/

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    INPUT SHAFT

    OUTPUT SHAFT

    OUTPUT

    SUN GEARS

    RING GEARS

    INPUT SUN

    GEARS

    PLANETARY

    CARRIER

    RINGGEARS

    1 2 3 4 5

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    TORQUE

    CONVERTERTORQUE CONVERTER

    OUTLET RELIEF VALVE

    POWER TRAIN HYDRAULIC SYSTEMSTEERING CLUTCH AND BRAKE

    BREATHER

    http://www.heavyequipments.org/

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    TORQUE

    CONVERTER

    FILTER

    TRANSMISSIONCONTROL VALVE

    PRIORITY

    VALVE

    TRANSMISSION FILTER

    TRANSMISSION

    PUMP

    MANIFOLD

    COOLER

    BYPASSOIL

    COOLER

    LUBE

    TC CASE

    SUMP

    TRANSMISSION

    CASE SUMP

    P3

    P1P2

    45

    31

    MAIN FRAME

    CASE SUMP

    BREATHER

    CHECK VALVE

    STEERING CLUTCH AND BRAKE VALVE

    1 2 3 4

    2

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    STEERING AND BRAKE VALVENO LEVER MOVEMENT

    http://www.heavyequipments.org/

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    TO LEFT

    CLUTCH

    TO LEFT

    BRAKEFROM

    PUMP

    TO RIGHT

    BRAKE

    TO RIGHT

    CLUTCH

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    STEERING AND BRAKE VALVEBRAKES ENGAGED

    http://www.heavyequipments.org/

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    TO LEFT

    CLUTCH

    TO LEFT

    BRAKEFROM

    PUMP

    TO RIGHT

    BRAKE

    TO RIGHT

    CLUTCH

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    DIFFERENTIAL STEERTRANSMISSION CONTROL VALVE

    NEUTRAL

    http://www.heavyequipments.org/

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    R N F

    2 13

    45

    1 2 3

    P3

    P1

    P2

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    SERVICE AND PARKING BRAKE CONTROL VALVE

    http://www.heavyequipments.org/

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    PARKI

    BRAKSPOO

    SERVICE BR

    SPOOL

    SERVICE BR

    PLUNGER

    PASSAGE A

    TO BRAKES

    FROM

    TRANSMISSION

    CHARGING PUMP

    STEERING

    PUMP STEERINGSTEERING

    D9R STEERING AND IMPLEMENT HYDRAULIC SYSTEM

    http://www.heavyequipments.org/

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    IMPLEMENT

    PUMP

    LIFTCYLINDERS

    QUICK-DROPVALVE

    IMPLEMENT SYSTEM

    PILOTVALVE

    STEERING

    MOTOR

    STEERING SYSTEM

    CHARGEPUMP

    INLET MANIFOLD

    END COVER

    BLADE LIFT

    BLADE TILT

    RIPPER LIFT

    RIPPER TILT TILT

    CYLINDERSDUAL TILT

    VALVE

    RIPPER

    CYLINDERS

    BYPASS AND

    PRESSURE

    CONTROL

    GROUP

    CHARGE COOLER

    AND FILTER LOOP

    TANK

    STEERING PUMPSTEERING MOTOR

    D9R STEERING SYSTEM

    http://www.heavyequipments.org/

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    FROM IMPLEMENTPUMP SUPPLY

    PILOT VALVE

    BYPASS ANDPRESSURECONTROL GROUP

    STEERING CHARGE

    CIRCUIT FILTER

    COOLER

    CHARGEPUMP

    CHARGEPRESSURE

    RELIEF VALVE

    CROSSOVER

    RELIEF VALVES

    STEERINGSERVOVALVE

    RESOLVERVALVE

    THERMAL BYPASSVALVE

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    D9R STEER MOTORNO TURN

    http://www.heavyequipments.org/

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    TO BYPASS

    AND PRESSURE

    CONTROL GROUP

    FROM BYPASS

    AND PRESSURE

    CONTROL GROUP LEFT STEER

    LOOP PRESSURE

    RIGHT STEERLOOP PRESSURE

    FROMSTEER

    PUMP

    FLUSHING

    VALVE

    FROM

    STEERPUMP

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    STEERINGPUMP

    D9R STEERING PUMPRIGHT TURN

    http://www.heavyequipments.org/

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    CHARGEPUMP

    CHARGEPRESSURE

    RELIEF VALVE

    CROSSOVERRELIEF VALVES

    PRESSURECUTOFFVALVE

    RESOLVERVALVE

    TO RIGHTSTEERMOTOR

    TO LEFTSTEERMOTOR

    TO PILOTCONTROL

    VALVETO/FROMBYPASS

    AND PRESSURECONTROL VALVE

    FROM LEFT

    STEERINGVALVE

    FROM RIGHT

    STEERINGVALVE

    PUMP CONTROLSERVO VALVE

    TO BYPASSAND

    PRESSURECONTROL VALVE

    (CASE DRAIN)

    RIGHTSTEER

    ACTUATOR

    LEFTSTEER

    ACTUATOR

    STEERINGPUMP

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    FROM

    CHARGE PUMPTO STEER MOTOR

    CASE DRAIN CHARGE

    PRESSURE

    CASE DRAIN

    FOR STEER PUMP

    BYPASS AND PRESSURE CONTROL GROUP

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    FROM

    IMPLEMENTPUMP

    TO COOLERIMPLEMENT PUMP

    CASE DRAIN

    FROM STEER

    MOTOR

    CASE DRAIN

    CASE DRAIN

    PRESSURE COOLINGORIFICE

    PRESSURE

    COLD OIL

    BYPASS

    CHARGE CIRCUIT

    MAKEUP VALVE

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    TO BYPASS AND PRESSURE

    CONTROL GROUP

    INLET MANIFOLD

    D9R HYDRAULIC SYSTEM

    QUICK-DROP

    VALVE

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    DUAL TILT OPTION

    SINGLE TILT OPTION

    END COVER

    RIPPER LIFT

    RIPPER TILT

    BLADE TILT

    BLADE LIFT

    DUAL TILT

    VALVE

    VALVE

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    MARGIN PRESSURE

    ADJUSTMENT

    PRESSURE AND FLOW COMPENSATOR VALVEPRESSURE CUTOFF

    ADJUSTMENT

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    TO TANK

    TO ACTUATOR

    FROM PUMP

    PRESSURE COMPENSATOR(CUTOFF) SPOOL

    FLOW COMPENSATOR

    (MARGIN) SPOOL

    SIGNAL FROM

    CONTROL VALVES

    NO SIGNALLARGE

    ACTUATORSWASHPLATEYOKE

    PAD

    PUMP

    OUTPUT

    PUMP AND COMPENSATOR OPERATIONENGINE OFF

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    SMALL ACTUATOR

    AND BIAS SPRING

    DRIVSHA

    PISTON AND

    BARREL ASSEMBLY

    PRESSURE

    COMPENSATOR

    (CUTOFF) SPOOL

    FLOW COMPENSATOR

    (MARGIN) SPOOL

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    PUMPOUTPUT

    INCREASEDPRESSURE

    PUMP AND COMPENSATOR OPERATIONDESTROKING

    SIGNAL

    LARGEACTUATOR SWASHPLATE

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    SMALL ACTUATOR

    AND BIAS SPRING

    PRESSURE

    COMPENSATOR

    (CUTOFF) SPOOL

    FLOW COMPENSATOR

    (MARGIN) SPOOL

    REDUCED

    PRESSUREPUMP OUTPUT

    AT MAXIMUMPRESSURE

    SIGNAL AT

    MAXIMUM

    PRESSURE

    PUMP AND COMPENSATOR OPERATIONHIGH PRESSURE STALL

    LARGE

    ACTUATOR SWASHPLATE

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    SMALL ACTUATOR

    AND BIAS SPRING

    PRESSURE

    COMPENSATOR

    (CUTOFF) SPOOL

    FLOW COMPENSATOR

    (MARGIN) SPOOL

    TO BYPASS ANDPRESSURE CONTROL VALVE

    INLET

    MANIFOLD

    BLADE

    LIFT

    SIGNAL LINE TOIMPLEMENT PUMP

    CHARGERELIEFVALVE

    SYSTEMRELIEFVALVE

    FLOWCONTROL

    VALVERESOLVER

    TOIMPLEMENT

    PUMPSUPPLY

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    RIPPER

    LIFT

    BLADE

    TILT

    RIPPER

    SHANK

    IN/OUT

    LIFTD9R IMPLEMENT

    CONTROLVALVE STACK

    TO RIPPERLIFT CYLINDERS

    TO RIPPERTILT CYLINDERS

    FLOW

    CONTROLVALVE

    FLOWCONTROL

    VALVE

    FLOW

    CONTROLVALVE

    RESOLVER

    RESOLVER

    RESOLVER

    PRESSURELIMITERVALVE

    TO LIFTCYLINDERS

    TO TILTCYLINDERS

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    ROD END HEAD END

    RESOLVER

    MAKEUP VALVE

    FROM

    PREVIOUS

    VALVE

    DOZER LIFT CONTROL VALVEBLADE LOWER

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    MAIN CONTROL SPOOL

    LOAD CHECK VALVE

    FROM PUMP

    TO

    NEXT

    VALVE

    FLOW CONTROL VALVE

    PIN

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    RIPPER LIFT CONTROL VALVERAISE

    HEAD END ROD END

    RESOLVER

    PR

    V

    MAKEUP

    VALVE

    MAKEUP

    VALVE

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    MAIN CONTROL SPOOL

    LOAD CHECK VALVE

    FROM PUMP

    TO

    NEXT

    VALVE

    FLOW CONTROL VALVE

    HEAD END ROD ENDF

    PREV

    MAKEUP

    VALVE

    RIPPER SHANK IN/OUT CONTROL VALVESHANK OUT

    RELIEFVALVE

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    MAIN CONTROL SPOOL

    RESOLVER

    LOAD CHECK VALVE

    FROM PUMP

    TO NEXTVALVE

    FLOW CONTROL VALVE

    QUICK-DROP VALVE

    DOZER LIFT

    CYLINDERD9R QUICK-DROP VALVE

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    TO ROD END

    TO HEAD END

    FROM

    CONTROL

    VALVE

    HEAD END

    FROM

    CONTROL

    VALVE

    ROD END

    DOZER LIFT

    CYLINDER

    DUMP VALVE

    MAIN VALVESPOOL

    SOLENOID

    VALVE

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    CYLINDER

    HEAD END

    CYLINDERROD END

    QUICK-DROP VALVEDOZER RAISE

    MAIN VALVESPOOL

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    A

    B

    C

    D

    SOLENOID

    VALVE

    TO

    CONTROL VALVE

    HEAD END

    FROM

    CONTROL VALVE

    ROD END

    DUMP VALVE

    A

    B

    C

    D

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    CYLINDER

    HEAD END

    CYLINDERROD END

    QUICK-DROP VALVEQUICK-DROP

    SOLENOID ENERGIZED

    MAIN VALVESPOOL

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    FROM

    CONTROL VALVE

    HEAD END

    TO

    CONTROL VALVE

    ROD END

    A

    B

    C

    A

    B

    C

    SOLENOID

    VALVED

    (ENERGIZED)

    D

    DUMP VALVE

    CYLINDER

    HEAD END

    CYLINDERROD END

    QUICK-DROP VALVEDOWN PRESSURE

    SOLENOID ENERGIZED

    MAIN VALVESPOOL

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    FROM

    CONTROL VALVE

    HEAD END

    TO

    CONTROL VALVE

    ROD END

    A

    B

    C

    A

    B

    C

    SOLENOID

    VALVE

    (ENERGIZED)

    D

    D

    DUMP VALVE

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    FROM TILT

    CONTROL VALVE

    DUAL TILT CIRCUITDUAL TILT RIGHT

    LEFT TILTCYLINDER

    RIGHT TILT

    TO ROD END

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    TO TILT

    CONTROL VALVE

    FROM IMPLEMENT

    PUMP

    FROM TRIGGERSWITCH

    FROM

    TOGGLE SWITCH

    CYLINDERTO HEAD END

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    FROM TILT

    CONTROL VALVE

    DUAL TILT CIRCUITBLADE PITCH FORWARD

    LEFT TILTCYLINDER

    RIGHT TILT

    TO ROD END

    http://www.heavyequipments.org/

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    TO TILT

    CONTROL VALVE

    FROM IMPLEMENT

    PUMP

    FROM TRIGGERSWITCH

    FROM

    TOGGLE SWITCH

    CYLINDERTO HEAD END

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