Manual Completo d8r

(1)

D

8

8 R

R

T

R

A

C

K

--

T

Y

P

E

T

R

A

C

T

O

R

S

(2)

• Dual twist tiller with integrated

speed selector and parking

brake

• Steering motor with internal

flushing valve

• Crossover and makeup valves

replace counterbalance valve

• Steering controlled by remote

pilot valve

• Piston-type pump for steering

only

D8N/D8R Two Pump

• Tiller control with separate

speed selector and parking

brake

• Steering motor without internal

flushing valve

• Counterbalance valve to

prevent overspeeding

• Steering control valve

integrated with implement

control valve

• Piston-type pump for steering

and hydraulics

D8N One Pump

(3)

D8N One Pump

D8N/D8R Two Pump

• Piston-type pump for

steering and implements

• Load sensing, pressure

compensated hydraulics

with steering priority

• Standard Caterpillar

cylinders

• Individual quick-drop

valve for each lift cylinder

• Individual ripper

function valves

• Piston-type pump

for implements only

• Load sensing, pressure

compensated hydraulics

• Threaded gland lift

and pin puller cylinders

• Single quick-drop valve

similar to the D6R/D7R

• One control valve with

pilot operated diverter for

all ripper functions

(4)

ADDITIONAL CHANGES

• Folded core radiator

• Two section transmission

pump

• 3406B DIT 212.5 kW

(285 hp)

• Two low maintenance,

high output batteries

• Fuel level dipstick

• Mechanical hourmeter

D8N One Pump

D8N Two Pump

D8R Two Pump

• Improved Multiple Row

Module (IMRM) radiator

• Three section transmission

pump (added torque

converter charging section)

• Improved operator's station

• 3406C DITA

212.5 kW (285 hp)

• Four heavy-duty,

maintenance free batteries

• Fuel level gauge on dash

• Electronic LCD hourmeter

• Advanced Modular

Cooling System (AMOCS)

• No Change

• 3406C DITA 228 kW (305 hp)

• No Change

• Seven ecology drains

• Torque rise @ 34%

• Torque rise @ 25%

• Torque rise @ 25% and

emissions certified

(5)

OPTIONAL EQUIPMENT

• Air Conditioning (R-134a)

• Fast fill fuel system

• Fast oil change system

for engine and transmission

• Dual tilt cylinders on 8A angle dozer

with tilt blade

• 58 Winch

(6)

(7)

(8)

(9)

(10)

(11)

(12)

(13)

(14)

D8R AIR INLET AND

EXHAUST SYSTEM

MUFFLER

TURBOCHARGER

AFTERCOOLER

PRECLEANER

CYLINDER

AIR

CLEANER

COMPRESSOR WHEEL

TURBINE WHEEL

DUST EJECTOR LINE

EXHAUST

MANIFOLD

HEAD AND

VALVES

EXHAUST

STACK

FILTER ELEMENT INDICATOR

BOOST

(15)

(16)

(17)

(18)

(19)

D8R FUEL SYSTEM

INJECTOR

SECONDARY

FILTER

PRIMING

PUMP

TRANSFER

PUMP

PRIMARY

FILTER

TANK

SUPPLY

RETURN

DRAIN

VALVE

SHUTOFF

VALVE

CONSTANT

BLEED VALVE

FUEL

PUMP

(20)

(21)

(22)

(23)

(24)

D8R ADVANCED MODULAR COOLING SYSTEM

ENGINE

OIL

COOLER

WATER

PUMP

AIR VENT

BYPASS

SHUNT

LINE

WATER PUMP

OUTLET

EXPANSION

TANK

TEMPERATURE

REGULATOR

AIR

FLOW

AFTERCOOLER

(25)

D8R AMOCS

RADIATOR

(26)

(27)

(28)

(29)

COOLANT

(30)

D8R ENGINE LUBRICATION SYSTEM

FROM

TURBOCHARGER

ENGINE

OIL PAN

SUCTION

BELL

OIL PUMP

COOLER

BYPASS

VALVE

OIL COOLER

OIL FILTER

BYPASS VALVE

OIL

FILTER

TO TURBOCHARGER

CYLINDER BLOCK

OIL MANIFOLD

RELIEF VALVE

(31)

(32)

(33)

TIMER/SOLENOID

FAST OIL

CHANGE FITTING

STARTER

MOTOR

GEAR

PUMP

OIL FLOW TO FILTER

SUCTION LINE

FRONT OF MACHINE

PRE-LUBRICATION STARTING SYSTEM

(34)

TIMER/SOLENOID

OIL PRESSURE

CUTOFF SWITCH

OIL FLOW TO

FILTER

CHECK VALVE

FRONT OF MACHINE

PRE-LUBRICATION STARTING SYSTEM

(35)

BATTERIES

POS NEG POS NEG

FRAME ENGINE ALTERNATOR BREAKER NEUTRAL-START SWITCH STARTER RELAY MAIN RELAY BUS BAR 307 OR RD 00 RD 00 200 BK BK 00 RD 00 RD 00 101 RD 306 GN 308 YL 109 RD 109 RD 200 BK 200 BK STARTER MOTOR/ PRELUBE 121 RD

POS NEG POS NEG RD 00 DISCONNECT SWITCH 10 A BACK-UP ALARM SWITCH 321 BR BACK-UP ALARM 200 BK 304 WH

SIDE AND REAR FLOOD LAMPS/RADIO 10 A

ALT + R

FORWARD HORN FRONT DASH DOME KEY START KEY START SWITCH R C S B ST OFF ON 105 RD 10 A 10 A 112 PU 308 YL 109 RD 109 RD 101 RD 105 RD 109 RD 307 OR A447 PK OIL PRESSURE CUTOFF SWITCH 337 WH 101RD G S MOTOR MTR BAT 15 A 10 A 10 A 15 A 15 A OPERATOR MONITOR

GAUGES AND SERVICE METER WIPER MOTORS CIGAR LIGHTER 116 BR 116 BR 337 WH 200 BK 301 BU PRE-LUBE TIMER/ SOLENOID

D8R PRE-LUBRICATION SYSTEM

307 OR BACK-UP ALARM

(36)

ENGINE TORQUE CONVERTER STEERING PUMP STEERING MOTOR FINAL DRIVE

D8N AND D8R TWO PUMP

DIFFERENTIAL STEER SYSTEM

PILOT VALVE

D8N ONE PUMP

DIFFERENTIAL STEER SYSTEM

IMPLEMENT AND STEERING PUMP STEERING VALVE TRANSMISSION PUMPS IMPLEMENT PUMP TRANSMISSION PUMPS IMPLEMENT CONTROL VALVES TRANSMISSION BRAKE AND DIFFERENTIAL

STEER MODULE IMPLEMENT

CONTROL VALVES

BRAKE AND PLANETARY DRIVE MODULE

(37)

LEFT FINAL DRIVE

RIGHT BRAKE LUBE

LEFT BRAKE LUBE

RIGHT FINAL DRIVE TRANSMISSION CONTROL VALVE RATIO VALVE TRANSFER AND BEVEL GEAR PARKING / SERVICE BRAKE VALVE REGULATING

RELIEF VALVE PRIORITY VALVEMAKEUP AND

VENT OIL COOLER 3406C ENGINE FLYWHEEL HOUSING TORQUE CONVERTER CONVERTER OUTLET RELIEF IMPLEMENT PUMP 2 1 1 - TRANSMISSION CHARGING 2 - CONVERTER CHARGING 3 - SCAVENGE 3 FILTER FILTER BYPASS

D8R POWER TRAIN

P1 P2 P3 LUBE DIFFERENTIAL STEER PUMP DIFFERENTIAL STEER MOTOR

(38)

(39)

SUN GEAR

ROTATING

HOUSING

IMPELLER

TURBINE

OUTLET

PASSAGE

OUTPUT SHAFT

STATOR

PLANET CARRIER

PLANET GEARS

ENGINE FLYWHEEL

INLET

PASSAGE

RING GEAR

TORQUE DIVIDER

(40)

(41)

(42)

POWER SHIFT TRANSMISSION

INPUT SHAFT

OUTPUT SHAFT

OUTPUT

SUN GEARS

RING GEARS

INPUT SUN

GEARS

PLANETARY

CARRIER

RING

GEARS

1

2

3

4

5

(43)

(44)

(45)

(46)

(47)

(48)

(49)

(50)

(51)

(52)

2 1 3 4 5 1 2 3 R N F FILTER PUMP TRANSMISSION CONTROL VALVE COOLER TC OUTLET RELIEF VALVE TORQUE CONVERTER PUMP DRIVE

D8R POWER TRAIN HYDRAULIC SYSTEM

P2 P3

P1 RIGHT BRAKE LUBE

LEFT BRAKE LUBE

TRANSMISSION LUBE SERVICE BRAKES WITH SHUTTLE VALVES

TRANSMISSION MAIN SUMP TRANSMISSION SUMP BRAKE VALVE MAKEUP AND PRIORITY VALVE MAIN SUMP

(53)

R N F

2

1

3

4

5

1 2 3

D8R TRANSMISSION CONTROL VALVE

NEUTRAL

P3

P1

P2

BLOCKED

PASSAGE

A

B

C

DIRECTIONAL

SPOOL

SPEED

SELECTOR

SPOOL

MODULATION

RELIEF

VALVE

RATIO

VALVE

LOAD

PISTON

PRESSURE

DIFFERENTIAL

VALVE

SCREENED

ORIFICE

(54)

R N F

1

3

4

5

1 2 3

D8R TRANSMISSION CONTROL VALVE

FIRST FORWARD

P3

P1

P2

2 A

B

C

DIRECTIONAL

SPOOL

SPEED

SELECTOR

SPOOL

MODULATION

RELIEF

VALVE

RATIO

VALVE

LOAD

PISTON

PRESSURE

DIFFERENTIAL

VALVE

SCREENED

ORIFICE

(55)

R N F

2

1

3

4

5

1 2 3

D8R TRANSMISSION CONTROL VALVE

START IN GEAR

P3

P1

P2

VENT PASSAGE

A

B

C

DIRECTIONAL

SPOOL

SPEED

SELECTOR

SPOOL

MODULATION

RELIEF

VALVE

RATIO

VALVE

LOAD

PISTON

PRESSURE

DIFFERENTIAL

VALVE

SCREENED

ORIFICE

(56)

(57)

RIGHT

BRAKE LUBE

LEFT

BRAKE LUBE

SERVICE BRAKES

WITH

SHUTTLE VALVES

MAIN SUMP

BRAKE VALVE

MAKEUP AND

PRIORITY VALVE

FROM CONVERTER

CHARGING PUMP

REGULATING RELIEF VALVE

CHECK VALVE

TO TORQUE CONVERTER

TO TRANSMISSION

CONTROL VALVE

FROM TRANSMISSION

CHARGING PUMP

SERVICE BRAKE PLUNGER

SERVICE BRAKE SPOOL

PARKING BRAKE SPOOL

PRIORITY VALVE

BRAKE SUPPLY

PASSAGE

PRIORITY VALVE PRESSURE

(58)

STEERING PINION SPROCKET SEGMENTS INNER PLANETARY GEARS OUTER PLANETARY GEARS _INNER SUN GEAR OUTER SUN GEAR OUTER CARRIER RING

GEAR CARRIERINNER

HUB DUO-CONE SEALS OUTER AXLE SHAFT BRAKE HOUSING HUB BELVILLE SPRING DISCS AND PLATES CHAMBER PISTON SPOOL RING GEAR CARRIER PLANET GEARS SUN GEARS BEVEL GEAR RING GEAR HOUSING CARRIER

CENTER AXLE SHAFT

FINAL DRIVE, BRAKE GROUP, AND

(59)

(60)

TO

STEERING

PINION

BRAKE RELEASED

SHUTTLE

SPOOL

BRAKE ENGAGED

SHUTTLE

SPOOL

PISTON

BRAKE SHUTTLE SPOOL

TO

STEERING

(61)

(62)

TO RIGHT

FINAL DRIVE

EQUALIZING

PLANETARY

DRIVE

PLANETARY

STEER

PLANETARY

TO LEFT

FINAL DRIVE

HYDRAULIC

MOTOR INPUT

TRANSMISSION

INPUT

(63)

TO RIGHT

FINAL DRIVE

TO LEFT

FINAL DRIVE

DIFFERENTIAL STEER COMPONENTS

STRAIGHT LINE OPERATION

EQUALIZING

PLANETARY

DRIVE

PLANETARY

STEER

PLANETARY

HYDRAULIC

MOTOR INPUT

TRANSMISSION

INPUT

(64)

TO RIGHT

FINAL DRIVE

TO LEFT

FINAL DRIVE

EQUALIZING

PLANETARY

DRIVE

PLANETARY

STEER

PLANETARY

HYDRAULIC

MOTOR INPUT

TRANSMISSION

INPUT

DIFFERENTIAL STEER COMPONENTS

(65)

STEERING COMPARISON - ONE PUMP vs TWO PUMPS

FIRST SPEED FORWARD

ONE PUMP WITH IMPLEMENTS

4.9 TO 6.0 M (16 TO 20 FT)*

ONE PUMP WITHOUT IMPLEMENTS

1.8 TO 2.3 M (5.9 TO 7.5 FT)*

TWO PUMPS - WITH OR

WITHOUT IMPLEMENTS

1.2 TO 1.8 M (3.9 TO 5.9 FT)*

(66)

TANK STEERING CHARGE CIRCUIT FILTER IMPLEMENT PUMP LIFT CYLINDERS QUICK-DROP VALVE

IMPLEMENT SYSTEM

STEERING PUMP STEERING PILOT VALVE STEERING MOTOR RIPPER CYLINDERS

STEERING SYSTEM

D8R STEERING AND IMPLEMENT HYDRAULIC SYSTEM

TILT CYLINDER/S CHARGE PUMP BYPASS AND PRESSURE CONTROL GROUP RIPPER DIVERTER VALVE INLET MANIFOLD RIPPER LIFT TILT END COVER

(67)

(68)

(69)

(70)

(71)

(72)

(73)

(74)

(75)

FROM IMPLEMENT

PUMP SUPPLY

TO RIPPER

DIVERTER VALVE

D8R

STEERING SYSTEM

FROM IMPLEMENT

PUMP CASE

PILOT VALVE

STEERING PUMP

STEERING MOTOR

BYPASS

AND

PRESSURE

CONTROL

GROUP

STEERING CHARGE

CIRCUIT FILTER

COOLER

TO CASE DRAIN

FILTER IN TANK

(76)

RIGHT STEER

LOOP PRESSURE

LEFT STEER

LOOP PRESSURE

FROM BYPASS

AND PRESSURE

CONTROL GROUP

D8R STEERING PILOT VALVE

NO TURN

TO PUMP

CONTROL

SPOOL

TO PUMP

CONTROL

SPOOL

(77)

TO BYPASS AND PRESSURE CONTROL VALVE FROM BYPASS AND PRESSURE CONTROL VALVE TO STEER MOTOR (RIGHT) TO STEER MOTOR (LEFT) CHARGE

PUMP STEERING_PUMP

CHARGE PRESSURE RELIEF PRESSURE COMPENSATOR VALVE CROSSOVER RELIEF VALVE PUMP CONTROL SPOOL PUMP CONTROL PISTON

D8R STEERING PUMP

NO TURN

_{PUMP CONTROL PISTON PRESSURE}

RIGHT LOOP LEFT LOOP RIGHT STEER LOOP LEFT STEER LOOP TO STEERING PILOT VALVE (LEFT) TO STEERING PILOT VALVE (RIGHT) TO BYPASS AND PRESSURE CONTROL GROUP

(78)

TO BYPASS

AND PRESSURE

CONTROL GROUP

FROM BYPASS

AND PRESSURE

CONTROL GROUP

_{LEFT STEER}

LOOP PRESSURE

RIGHT STEER

LOOP PRESSURE

FROM

STEER

PUMP

D8R STEER MOTOR

NO TURN

FLUSHING

VALVE

FROM

STEER

PUMP

(79)

STEERING MOTOR

FLUSHING VALVE

(80)

RIGHT STEER

LOOP PRESSURE

LEFT STEER

LOOP PRESSURE

FROM BYPASS

AND PRESSURE

CONTROL GROUP

D8R STEERING PILOT VALVE

FROM PUMP

CONTROL

SPOOL

LEFT TURN

TO PUMP

CONTROL

SPOOL

(81)

FROM STEERING PILOT VALVE (LEFT) TO BYPASS AND PRESSURE CONTROL VALVE FROM BYPASS AND PRESSURE CONTROL VALVE TO STEER MOTOR (RIGHT) TO STEER MOTOR (LEFT) TO STEERING PILOT VALVE (RIGHT) CHARGE

PUMP STEERING_PUMP

CHARGE PRESSURE RELIEF PRESSURE COMPENSATOR VALVE CROSSOVER RELIEF VALVE PUMP CONTROL SPOOL PUMP CONTROL PISTON

D8R STEERING PUMP

LEFT TURN

PUMP CONTROL PISTON PRESSURE RIGHT LOOP LEFT LOOP TO BYPASS AND PRESSURE CONTROL GROUP

(82)

STEERING PUMP

END VIEW

RIGHT CROSSOVER

RELIEF VALVE

LEFT CROSSOVER

RELIEF VALVE

CHARGE PRESSURE

RELIEF VALVE

PRESSURE

COMPENSATOR VALVE

TOP

ORIFICE PLUG

(83)

TO BYPASS

AND PRESSURE

CONTROL GROUP

FROM BYPASS

AND PRESSURE

CONTROL GROUP

LEFT STEER

LOOP PRESSURE

RIGHT STEER

LOOP PRESSURE

TO

STEER

PUMP

FROM

STEER

PUMP

D8R STEER MOTOR

LEFT TURN

FLUSHING

VALVE

(84)

STEERING PUMP (TOP VIEW)

PUMP CONTROL

PISTON

RETAINER

SPOOL

CONTROL

ARM

TO PILOT VALVE

PUMP CONTROL

SPOOL

STOP

COMPRESSION

SPRING

FEEDBACK

LEVER

ROD

SPRING COLLAR

LEFT SIDE

RIGHT SIDE

RIGHT

LEVER

ARM

LEFT

LEVER

ARM

PIVOT POINT

FROM

PILOT VALVE

LEFT TURN

(85)

STEERING PUMP

SIDE VIEW

PUMP CONTROL VALVE

PUMP

CONTROL

PISTON

RIGHT

CROSSOVER

RELIEF VALVE

LEFT

CROSSOVER

RELIEF VALVE

CHARGE

PUMP

FEEDBACK LEVER

SWASHPLATE

PISTONS

(86)

FROM STEER

MOTOR

CASE DRAIN

TO STEER MOTOR

CASE DRAIN

CHARGE

PUMP

DISCHARGE

PRESSURE

CHARGE

PUMP RELIEF

PRESSURE

CASE RETURN

PRESSURE

FROM IMPLEMENT

PUMP SUPPLY

TO

FILTER

FROM

CHARGE PUMP

FROM

COOLER

TO CHARGE

PRESSURE RELIEF

VALVE

FROM

FILTER

FROM

STEER PUMP

CASE DRAIN

FROM

IMPLEMENT PUMP

CASE DRAIN

TO COOLER, PILOT, AND

RIPPER DIVERTER VALVE

COLD OIL

BYPASS

COOLER

BYPASS

CHARGE

CIRCUIT

MAKEUP

VALVE

BYPASS AND PRESSURE CONTROL GROUP

COOLING ORIFICE

TO CASE DRAIN

FILTER IN TANK

(87)

(88)

(89)

(90)

TANK STEERING CHARGE CIRCUIT FILTER IMPLEMENT PUMP LIFT CYLINDERS QUICK-DROP VALVE

IMPLEMENT SYSTEM

STEERING PUMP STEERING PILOT VALVE STEERING MOTOR RIPPER CYLINDERS

STEERING SYSTEM

D8R STEERING AND IMPLEMENT HYDRAULIC SYSTEM

TILT CYLINDER CHARGE PUMP BYPASS AND PRESSURE CONTROL GROUP RIPPER DIVERTER VALVE INLET MANIFOLD RIPPER LIFT TILT END COVER

(91)

(92)

(93)

(94)

(95)

(96)

(97)

(98)

PUMP

DIVERTER

STEERING

CHARGE PRESSURE

BYPASS AND PRESSURE

CONTROL GROUP

QUICK-DROP

INLET

MANIFOLD

RIPPER

LIFT

TILT

END

COVER

(99)

TO BYPASS

AND PRESSURE

CONTROL VALVE

TO BYPASS

AND PRESSURE

CONTROL VALVE

STEERING

CHARGE

PRESSURE

X

D8R IMPLEMENT HYDRAULIC SYSTEM

IMPLEMENT PUMP

QUICK-DROP

VALVE

TANK

TILT

LIFT

RIPPER

INLET

MANIFOLD

RIPPER

DIVERTER

TO STEERING

CHARGE PUMP

(100)

TO TANK

TO

ACTUATOR PISTON

FROM

OUTPUT PORT

PRESSURE COMPENSATOR

(CUTOFF) SPRING

FLOW COMPENSATOR

(MARGIN) SPRING

PRESSURE COMPENSATOR

(CUTOFF) SPOOL

FLOW COMPENSATOR

(MARGIN) SPOOL

ADJUSTMENT SCREWS

(101)

PUMP OUTPUT

LARGE ACTUATOR

SMALL ACTUATOR

AND BIAS SPRING

SWASHPLATE

DRIVE

SHAFT

YOKE PAD

PRESSURE

COMPENSATOR

(CUTOFF) SPOOL

FLOW COMPENSATOR

( MARGIN) SPOOL

NO SIGNAL

PISTON AND

BARREL ASSEMBLY

PUMP AND COMPENSATOR OPERATION

(102)

PUMP OUTPUT

NO SIGNAL

PUMP AND COMPENSATOR OPERATION

LOW PRESSURE STANDBY

(103)

PUMP OUTPUT

SIGNAL

REDUCED PRESSURE

PUMP AND COMPENSATOR OPERATION

(104)

REDUCED PRESSURE

PUMP AND COMPENSATOR OPERATION

CONSTANT FLOW

PUMP OUTPUT

SIGNAL

(105)

INCREASED PRESSURE

PUMP AND COMPENSATOR OPERATION

DESTROKING

PUMP OUTPUT

SIGNAL

(106)

PUMP OUTPUT

AT MAX.

PRESSURE

SIGNAL AT

MAX. PRESSURE

PUMP AND COMPENSATOR OPERATION

HIGH PRESSURE STALL

(107)

D8R IMPLEMENT VALVES

TO BYPASS AND PRESSURE CONTROL GROUP IMPLEMENT PUMP

PRESSURE

IMPLEMENT PUMP SIGNAL

PRESSURE _{SIGNAL LINE TO} IMPLEMENT PUMP TO IMPLEMENT PUMP SUPPLY SYSTEM RELIEF VALVE CHARGE RELIEF VALVE FLOW CONTROL VALVE FLOW CONTROL VALVE FLOW CONTROL VALVE TO RIPPER LIFT CYLINDERS TO LIFT CYLINDERS TO TILT CYLINDERS . RIPPER LIFT TILT INLET MANIFOLD

(108)

ROD END

HEAD END

_RETURN

TO TANK

LOAD CHECK

VALVE

PLUG

DOZER LIFT VALVE

HOLD

TO

COMPENSATOR

VALVE

MAIN CONTROL

SPOOL

RESOLVER

MAKEUP

VALVE

FLOW CONTROL SPOOL

FROM PUMP

FROM

ROD END

HEAD END

RETURN

TO TANK

LOAD CHECK

VALVE

PLUG

DOZER LIFT VALVE

RAISE

TO

COMPENSATOR

VALVE

MAIN CONTROL

SPOOL

RESOLVER

MAKEUP

VALVE

FLOW CONTROL SPOOL

FROM PUMP

FROM

ROD END

HEAD END

RETURN

TO TANK

LOAD CHECK

VALVE

FLOW CONTROL SPOOL

PLUG

DOZER LIFT VALVE

LOWER

TO

COMPENSATOR

VALVE

MAIN CONTROL

SPOOL

RESOLVER

MAKEUP

VALVE

FROM PUMP

FROM

VALVE

(111)

ROD END

HEAD END

RETURN

TO TANK

LOAD CHECK

VALVE

PLUG

DOZER TILT VALVE

TILT LEFT

MAIN CONTROL

SPOOL

RESOLVER

PLUG

FLOW CONTROL SPOOL

FROM PUMP

TO

COMPENSATOR

VALVE

(112)

ROD END

HEAD END

RETURN

TO TANK

LOAD CHECK

VALVE

PLUG

RIPPER CONTROL VALVE

HOLD

TO

COMPENSATOR

VALVE

MAIN CONTROL

SPOOL

RESOLVER

MAKEUP

VALVE

FLOW CONTROL SPOOL

FROM PUMP

FROM

D8R QUICK-DROP VALVE

QUICK-DROP VALVE DOZER TILT DOZER LIFT TO IMPLEMENT VALVE TO IMPLEMENT VALVE TO IMPLEMENT VALVE

D8R QUICK-DROP VALVE

TO ROD END TO HEAD END

(114)

COVER

PLUNGER

PASSAGE TO

SPOOL END

VALVE SPOOL

ORIFICE SLEEVE

TO RIGHT CYLINDER

ROD END

TO RIGHT CYLINDER

HEAD END

TO LEFT CYLINDER

ROD END

TO LEFT CYLINDER

HEAD END

TO/FROM LIFT CONTROL VALVE

PASSAGE TO

PLUNGER END

QUICK-DROP VALVE

HOLD

(115)

COVER

PLUNGER

PASSAGE TO

SPOOL END

VALVE SPOOL

ORIFICE SLEEVE

TO RIGHT CYLINDER

ROD END

TO RIGHT CYLINDER

HEAD END

TO LEFT CYLINDER

ROD END

TO LEFT CYLINDER

HEAD END

TO/FROM LIFT CONTROL VALVE

QUICK-DROP VALVE

DOZER RAISE

PASSAGE TO

PLUNGER END

(116)

COVER

PLUNGER

PASSAGE TO

SPOOL END

VALVE SPOOL

ORIFICE SLEEVE

FROM RIGHT CYLINDER

ROD END

TO RIGHT CYLINDER

HEAD END

FROM LEFT CYLINDER

ROD END

TO LEFT CYLINDER

HEAD END

TO/FROM LIFT CONTROL VALVE

QUICK-DROP VALVE

DOZER LOWER

PASSAGE TO

PLUNGER END

(117)

COVER

PLUNGER

PASSAGE TO

SPOOL END

VALVE SPOOL

ORIFICE SLEEVE

FROM RIGHT CYLINDER

ROD END

TO RIGHT CYLINDER

HEAD END

FROM LEFT CYLINDER

ROD END

TO LEFT CYLINDER

HEAD END

TO/FROM LIFT CONTROL VALVE

QUICK-DROP VALVE

QUICK-DROP

PASSAGE TO

PLUNGER END

(118)

COVER

PLUNGER

PASSAGE TO

SPOOL END

VALVE SPOOL

ORIFICE SLEEVE

FROM RIGHT CYLINDER

ROD END

TO RIGHT CYLINDER

HEAD END

FROM LEFT CYLINDER

ROD END

TO LEFT CYLINDER

HEAD END

TO/FROM LIFT CONTROL VALVE

QUICK-DROP VALVE

DOZER LOWER

WITH DOWN PRESSURE

PASSAGE TO

PLUNGER END

(119)

RIPPER TIP

RIPPER LIFT

FROM RIPPER

CONTROL

VALVE

STEERING

CHARGE PRESSURE

D8R RIPPER DIVERTER VALVE

STEERING

CHARGE

PRESSURE

(120)

RIPPER TIP IN

( PORT E)

RIPPER TIP OUT

(PORT F)

RIPPER LOWER

(PORT C)

RIPPER RAISE

(PORT D)

CHARGE PRESSURE

TEST PORT

C

E

D

F

RIPPER SUPPLY

LOWER/TIP IN

RIPPER SUPPLY

RAISE/TIP OUT

(121)

BATTERIES

FRAME ENGINE ALTERNATOR BREAKER NEUTRAL-START SWITCH STARTER RELAY MAIN

RELAY BUS BAR

307 OR RD 00 RD 00 200 BK BK 00 RD 00 RD 00 101 RD 306 GN 308 YL 109 RD 109 RD 200 BK 200 BK STARTER MOTOR 121 RD

POS NEG POS NEG RD 00

DISCONNECT SWITCH

10 A BACK-UP

ALARM BACK-UP ALARM_SWITCH

321 BR BACK-UP ALARM 200 BK 304 WH 15 A 10 A 10 A 15 A 15 A

SIDE AND REAR FLOOD LAMPS/RADIO OPERATOR MONITOR

GAUGES AND SERVICE METER WIPER MOTORS

CIGAR LIGHTER 10 A

ALT + R

FORWARD HORN FRONT DASH DOME KEY START KEY START SWITCH R C S B ST OFF ON 105 RD 10 A 10 A G S MOTOR MTR BAT 112 PU 308 YL 109 RD 109 RD 101 RD 105 RD 109 RD

(122)

(123)

(124)

(125)

(126)

COOLANT

TEMPERATURE

COOLANT

FLOW

ENGINE

OIL PRESSURE

HYDRAULIC

OIL TEMPERATURE

POWER TRAIN

OIL TEMPERATURE

POWER TRAIN

OIL FILTER

ALTERNATOR

HYDRAULIC

OIL FILTER

D8R EMS PANEL

(127)

(128)

(129)

(130)

(131)

(132)

CONDENSER

COIL

COMPRESSOR

EVAPORATOR

COIL

ORIFICE TUBE/

DRYER

ACCUMULATOR

EVAPORATOR BLOWER FAN

D8R ORIFICE TUBE SYSTEM

(133)

(134)

ORIFICE TUBE

SCREEN

BODY

SCREEN

(135)

(136)

DRIVE PLATE

HUB

PULLEY ASSEMBLY

BEARING

COIL ASSEMBLY

SHAFT

COMPRESSOR

CLUTCH

(137)

(138)

OIL BLEED LINE

VAPOR LINE

OUTLET

DIVERTER CAP

INLET

ACCUMULATOR

(139)

(140)

(141)

BATTERY

CLUTCH

POINT

OPENING

CAPILLARY TUBE

CAPILLARY BELLOWS

ASSEMBLY

PIVOTING FRAME

TEMPERATURE

ADJUSTING SCREW

R-134a

THERMOSTATIC

SWITCH

COMPRESSOR

ELECTRICAL CIRCUIT

(142)

BATTERIES

FRAME ENGINE ALTERNATOR BREAKER NEUTRAL-START SWITCH STARTER RELAY MAIN RELAY BUS BAR 307 OR RD 00 RD 00 200 BK BK 00 RD 00 RD 00 101 RD 306 GN 308 YL 109 RD 200 BK 200 BK STARTER MOTOR

D8R OPERATOR'S STATION AIR CONDITIONING SYSTEM

POS NEG POS NEG RD 00 DISCONNECT SWITCH 304 WH ALT + R KEY START KEY START SWITCH

R C S B ST OFF ON 10 A G S MOTOR MTR BAT 112 PU 308 YL 109 RD 101 RD 105 RD 109 RD 124 GN BLOWER MOTOR BREAKER BLOWER MOTOR SWITCH BLOWER MOTOR BLOWER MOTOR 1 2 5 4 3 RESISTOR 517 BU 516 GN 515 GY 515 GY 20 A T° THERMOSTAT SWITCH ARC SUPPRESSOR

AIR CONDITIONER CLUTCH REFRIGERANT SWITCH

(NORMALLY OPEN BEFORE REFRIGERANT CHARGE)

521 YL

(143)

(144)

(145)

(146)

(147)

BATTERIES

FRAME ENGINE ALTERNATOR BREAKER NEUTRAL-START SWITCH STARTER RELAY MAIN RELAY BUS BAR 307 OR RD 00 RD 00 200 BK BK 00 RD 00 RD 00 101 RD 306 GN 308 YL 109 RD 200 BK 200 BK STARTER MOTOR

D8R OPERATOR'S STATION HEATING SYSTEM

POS NEG POS NEG RD 00 DISCONNECT SWITCH 304 WH ALT + R KEY START KEY START SWITCH R C S B ST OFF ON 10 A G S MOTOR MTR BAT 112 PU 308 YL 109 RD 101 RD 105 RD 109 RD 124 GN BLOWER MOTOR BREAKER BLOWER MOTOR SWITCH BLOWER MOTOR BLOWER MOTOR 1 2 5 4 3 RESISTOR 517 BU 516 GN 515 GY 515 GY 20 A

(148)

(149)

(150)

(151)