Material Caterpillar d8r Bulldozer Transmission Power Train Hydraulic System Components Diagrams

LEFT FINAL DRIVE

LEFT BRAKE LUBE

D8R POWER TRAIN

REGULATING MAKEUP AND RELIEF VALVE PRIORITY VALVE

DIFFERENTIAL STEER MOTOR DIFFERENTIAL STEER PUMP

FLYWHEEL HOUSING TORQUE CONVERTER

CONVERTER OUTLET VENT RELIEF

TRANSMISSION CONTROL VALVE P2 P1

3406C ENGINE

P3 LUBE 3

2

1

OIL COOLER

RATIO VALVE TRANSFER AND BEVEL GEAR PARKING / SERVICE BRAKE VALVE FILTER

RIGHT BRAKE LUBE RIGHT FINAL DRIVE FILTER BYPASS

IMPLEMENT PUMP 1 - TRANSMISSION CHARGING 2 - CONVERTER CHARGING 3 - SCAVENGE

TORQUE DIVIDER ENGINE FLYWHEEL

PLANET GEARS

ROTATING HOUSING OUTLET PASSAGE

SUN GEAR

OUTPUT SHAFT STATOR

PLANET CARRIER RING GEAR

INLET PASSAGE

TURBINE IMPELLER

POWER SHIFT TRANSMISSION RING GEARS

RING GEARS

INPUT SUN GEARS

INPUT SHAFT

OUTPUT SHAFT PLANETARY CARRIER

OUTPUT SUN GEARS

1

2

3

4

5

D8R POWER TRAIN HYDRAULIC SYSTEM TORQUE CONVERTER TRANSMISSION CONTROL VALVE

5

TC OUTLET RELIEF VALVE

PUMP DRIVE

4

COOLER

1 2 3

SERVICE BRAKES WITH SHUTTLE VALVES P3

LEFT BRAKE LUBE

R N F

P1

3

2

1

P2

RIGHT BRAKE LUBE BRAKE VALVE

TRANSMISSION LUBE MAIN SUMP

TRANSMISSION

TRANSMISSION SUMP

PUMP

FILTER

MAIN SUMP

MAKEUP AND PRIORITY VALVE

D8R TRANSMISSION CONTROL VALVE NEUTRAL MODULATION RELIEF VALVE

SPEED SELECTOR SPOOL

5

4

1 2 3

LOAD PISTON C

RATIO VALVE

SCREENED ORIFICE

PRESSURE DIFFERENTIAL VALVE

B

P3

DIRECTIONAL SPOOL

BLOCKED PASSAGE R N F

A

P1

3

2

1

P2

D8R TRANSMISSION CONTROL VALVE FIRST FORWARD SPEED SELECTOR SPOOL

MODULATION RELIEF VALVE

5

4

1 2 3

LOAD PISTON SCREENED ORIFICE

C

RATIO VALVE


B

P3

DIRECTIONAL SPOOL

R N

A

F

P1

3

2

1

P2

D8R TRANSMISSION CONTROL VALVE START IN GEAR MODULATION RELIEF VALVE

SPEED SELECTOR SPOOL

5

4

1 2 3

LOAD PISTON SCREENED ORIFICE

C

RATIO VALVE


B

P3

DIRECTIONAL SPOOL

R N F

A

P1

2

3 VENT PASSAGE

1

P2

BRAKE CONTROL VALVE GROUP PARKING BRAKE SPOOL

BRAKE SUPPLY PASSAGE

LEFT BRAKE LUBE RIGHT BRAKE LUBE

FROM CONVERTER CHARGING PUMP

SERVICE BRAKES WITH SHUTTLE VALVES

MAIN SUMP SERVICE BRAKE SPOOL

REGULATING RELIEF VALVE CHECK VALVE

BRAKE VALVE SERVICE BRAKE PLUNGER PRIORITY VALVE PRESSURE

TO TORQUE CONVERTER TO TRANSMISSION CONTROL VALVE

FROM TRANSMISSION CHARGING PUMP

PRIORITY VALVE

MAKEUP AND PRIORITY VALVE

FINAL DRIVE, BRAKE GROUP, AND STEERING DIFFERENTIAL AND PLANETARY SPROCKET SEGMENTS INNER PLANETARY GEARS

OUTER PLANETARY GEARS

INNER SUN GEAR

BRAKE HOUSING

DISCS AND PLATES

SPOOL

HOUSING

STEERING PINION

HUB

RING GEAR CARRIER PLANET GEARS OUTER AXLE SHAFT

CENTER AXLE SHAFT

SUN GEARS OUTER SUN GEAR OUTER CARRIER RING GEAR CARRIER BEVEL GEAR HUB DUO-CONE SEALS

RING GEAR

INNER CARRIER

CHAMBER PISTON

BELVILLE SPRING

BRAKE SHUTTLE SPOOL SHUTTLE SPOOL

TO STEERING PINION

SHUTTLE SPOOL

PISTON

BRAKE ENGAGED

BRAKE RELEASED

TO STEERING PINION

DIFFERENTIAL STEER COMPONENTS HYDRAULIC MOTOR INPUT

TRANSMISSION INPUT

TO LEFT FINAL DRIVE

TO RIGHT FINAL DRIVE

STEER DRIVE PLANETARY PLANETARY

EQUALIZING PLANETARY

DIFFERENTIAL STEER COMPONENTS STRAIGHT LINE OPERATION HYDRAULIC MOTOR INPUT

TRANSMISSION INPUT

TO LEFT FINAL DRIVE


STEER PLANETARY

DRIVE PLANETARY


DIFFERENTIAL STEER COMPONENTS LEFT TURN - FORWARD HYDRAULIC MOTOR INPUT

TRANSMISSION INPUT


TO LEFT FINAL DRIVE

STEER PLANETARY

DRIVE PLANETARY


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)* * INSIDE TURNING DIAMETER

D8R STEERING AND IMPLEMENT HYDRAULIC SYSTEM

STEERING MOTOR

STEERING SYSTEM

STEERING PUMP CHARGE PUMP

STEERING PILOT VALVE

BYPASS AND PRESSURE CONTROL GROUP

RIPPER CYLINDERS

STEERING CHARGE CIRCUIT FILTER

RIPPER DIVERTER VALVE TANK

IMPLEMENT SYSTEM IMPLEMENT PUMP INLET MANIFOLD RIPPER QUICK-DROP VALVE

LIFT TILT END COVER

TILT CYLINDER/S

LIFT CYLINDERS

STEERING MOTOR

STEERING PUMP

PILOT VALVE

BYPASS AND PRESSURE CONTROL GROUP

COOLER

TO RIPPER DIVERTER VALVE

TO CASE DRAIN FILTER IN TANK FROM IMPLEMENT PUMP CASE FROM IMPLEMENT PUMP SUPPLY

STEERING CHARGE CIRCUIT FILTER

D8R STEERING SYSTEM

D8R STEERING PILOT VALVE NO TURN

LEFT STEER LOOP PRESSURE

RIGHT STEER LOOP PRESSURE

TO PUMP CONTROL SPOOL

FROM BYPASS AND PRESSURE CONTROL GROUP


D8R STEERING PUMP NO TURN

RIGHT STEER LOOP

PUMP CONTROL PISTON PRESSURE RIGHT LOOP LEFT LOOP

TO STEER MOTOR (RIGHT)

CHARGE PUMP

CHARGE PRESSURE PRESSURE COMPENSATOR RELIEF VALVE CROSSOVER RELIEF VALVE

STEERING PUMP PUMP CONTROL PISTON

TO BYPASS AND PRESSURE CONTROL GROUP

TO STEER MOTOR (LEFT)

LEFT STEER LOOP FROM BYPASS AND PRESSURE CONTROL VALVE TO BYPASS AND PRESSURE CONTROL VALVE

PUMP CONTROL SPOOL

TO STEERING PILOT VALVE (RIGHT)

TO STEERING PILOT VALVE (LEFT)

D8R STEER MOTOR NO TURN FROM STEER PUMP


FLUSHING VALVE



FROM STEER PUMP LEFT STEER LOOP PRESSURE

STEERING MOTOR FLUSHING VALVE

PIN

D8R STEERING PILOT VALVE LEFT TURN



FROM PUMP CONTROL SPOOL



D8R STEERING PUMP LEFT TURN PUMP CONTROL PISTON PRESSURE LEFT LOOP

TO STEER MOTOR (RIGHT)

CHARGE PUMP

RIGHT LOOP

CHARGE PRESSURE PRESSURE COMPENSATOR RELIEF VALVE CROSSOVER RELIEF VALVE

STEERING PUMP PUMP CONTROL PISTON


TO STEER MOTOR (LEFT)

FROM BYPASS AND PRESSURE CONTROL VALVE TO BYPASS AND PRESSURE CONTROL VALVE

PUMP CONTROL SPOOL

TO STEERING PILOT VALVE (RIGHT)

FROM STEERING PILOT VALVE (LEFT)

STEERING PUMP END VIEW TOP

RIGHT CROSSOVER RELIEF VALVE CHARGE PRESSURE RELIEF VALVE

ORIFICE PLUG

PRESSURE COMPENSATOR VALVE

LEFT CROSSOVER RELIEF VALVE

D8R STEER MOTOR LEFT TURN TO STEER PUMP


FLUSHING VALVE


FROM STEER PUMP FROM BYPASS AND PRESSURE CONTROL GROUP


STEERING PUMP (TOP VIEW) LEFT TURN SPRING COLLAR

RETAINER

FROM PILOT VALVE RIGHT SIDE PUMP CONTROL SPOOL

ROD

RIGHT LEVER ARM STOP

COMPRESSION SPRING

LEFT LEVER ARM

PUMP CONTROL PISTON

FEEDBACK LEVER

LEFT SIDE TO PILOT VALVE PIVOT POINT

SPOOL CONTROL ARM

PUMP CONTROL PISTON

FEEDBACK LEVER

PUMP CONTROL VALVE

RIGHT CROSSOVER RELIEF VALVE

STEERING PUMP SIDE VIEW

CHARGE PUMP

SWASHPLATE

PISTONS

LEFT CROSSOVER RELIEF VALVE

BYPASS AND PRESSURE CONTROL GROUP TO COOLER, PILOT, AND RIPPER DIVERTER VALVE

TO STEER MOTOR CASE DRAIN

FROM STEER PUMP CHARGE FROM PUMP CASE DRAIN DISCHARGE CHARGE PUMP PRESSURE

FROM CHARGE PUMP RELIEF COOLER PRESSURE

CASE RETURN PRESSURE COLD OIL BYPASS

COOLING ORIFICE FROM STEER MOTOR CASE DRAIN

CHARGE CIRCUIT MAKEUP VALVE

COOLER BYPASS

TO CASE DRAIN FILTER IN TANK TO FILTER FROM IMPLEMENT PUMP CASE DRAIN

FROM IMPLEMENT PUMP SUPPLY

FROM FILTER

TO CHARGE PRESSURE RELIEF VALVE

Material Caterpillar d8r Bulldozer Transmission Power Train Hydraulic System Components Diagrams

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