Course Caterpillar 992g Wheel Loader Power Train Components Diagrams Schematics Transmission Systems

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POWER TRAIN

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POWER TRAIN COMPONENTS ENGINE

IM PELLER CLUTCH TORQUE CONVERTER

REAR FINAL DRIVE

UPPER DRIVE SHAFT

REAR DRIVE SHAFT

INPUT TRANSFER GEAR

OUTPUT TRANSFER GEAR

TRANSMISSION

FRONT DRIVE SHAFT

FRONT FINAL DRIVE

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POWER TRAIN SCHEMATIC PRIORITY VALVE

TRANSMISSION CONTROL VALVE

LUC SOLENOID

IC SOLENOID

LOCKUP CLUTCH

IMPELLER CLUTCH

T/C FILTER

TRANS FILTER

TRANSMISSION TORQUE CONVERTER

PUMP

T/C OUTLET RELIEF VALVE

INPUT TRANSFER GEAR OUTPUT TRANSFER GEAR

COOLER

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- 128 TRANSMISSION HYDRAULIC CONTROL VALVE MODULATION RELIEF VALVE

FIRST AND THIRD SPEED SELECTOR SPOOL CONVERTER INLET RATIO VALVE LOAD PISTON DIRECTIONAL SELECTOR SPOOL

PRESSURE DIFFERENTIAL VALVE

SECOND SPEED SELECTOR SPOOL

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- 130 TURBINE

IMPELLER CLUTCH TORQUE CONVERTER

STATOR

HOUSING

IMPELLER CLUTCH LOCKUP CLUTCH IMPELLER

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IMPELLER CLUTCH SOLENOID VALVE

TEST PORT

BALL

SPRING

VALVE SPOOL

ORIFICE

 

SPRING

IMPELLER CLUTCH SOLENOID ENERGIZED

SOLENOID

ARMATURE ASSEMBLY

FROM PUMP TO IMPELLER CLUTCH TEST PORT

SPRING

BALL

VALVE SPOOL

ORIFICE

TEST PORT

SOLENOID

ARMATURE ASSEMBLY

 

SPRING

IMPELLER CLUTCH SOLENOID DE-ENERGIZED FROM PUMP

TO IMPELLER CLUTCH

- 133 TEST PORT

BALL

VALVE SPOOL

ORIFICE

LOCKUP CLUTCH SOLENOID VALVE  

SPRING

LOCKUP CLUTCH SOLENOID ENERGIZED SOLENOID

PIN

FROM PUMP TO LOCKUP CLUTCH TEST PORT

BALL

VALVE SPOOL

ORIFICE

 

SPRING

LOCKUP CLUTCH SOLENOID DE-ENERGIZED SOLENOID

PIN

FROM PUMP TO LOCKUP CLUTCH

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TRANSMISSION HYDRAULIC SYSTEM NEUTRAL

2

3

PRIORITY VALVE 1

5

IMPELLER CLUTCH SOLENOID VALVE

4

LOCKUP CLUTCH SOLENOID VALVE

TRANSMISSION FILTER

3

2

5

TORQUE CONVERTER OUTLET RELIEF VALVE

TORQUE CONVERTER FILTER

1 TORQUE CONVERTER 4 PUMP TRANSMISSION CONTROL VALVE SUMP

TO TRANSMISSION

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TRANSMISSION HYDRAULIC SYSTEM FIRST SPEED FORWARD TORQUE CONVERTER DRIVE

2

3

   T    R    O    P    T    S    E    T

PRIORITY VALVE 1

5

IMPELLER CLUTCH SOLENOID VALVE

4

LOCKUP CLUTCH SOLENOID VALVE

TRANSMISSION FILTER

3

2

5

TORQUE CONVERTER OUTLET RELIEF VALVE

TORQUE CONVERTER FILTER

1

TORQUE CONVERTER 4 PUMP TRANSMISSION CONTROL VALVE SUMP

TO TRANSMISSION

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TRANSMISSION HYDRAULIC SYSTEM SECOND SPEED FORWARD SPEED SHIFT

2

3

   T    R    O    P    T    S    E    T

PRIORITY VALVE 1

5

4

IMPELLER CLUTCH SOLENOID VALVE

LOCKUP CLUTCH SOLENOID VALVE

3

2

TRANSMISSION FILTER

5

TORQUE CONVERTER OUTLET RELIEF VALVE

TORQUE CONVERTER FILTER

1 TORQUE CONVERTER 4 PUMP TRANSMISSION CONTROL VALVE SUMP

TO TRANSMISSION

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TRANSMISSION HYDRAULIC SYSTEM SECOND SPEED REVERSE DIRECTION SHIFT

2

3

PRIORITY VALVE 1

5

IMPELLER CLUTCH SOLENOID VALVE

4

LOCKUP CLUTCH SOLENOID VALVE

TRANSMISSION FILTER

3

2

5

TORQUE CONVERTER OUTLET RELIEF VALVE

TORQUE CONVERTER FILTER

1

TORQUE CONVERTER 4 PUMP TRANSMISSION CONTROL VALVE SUMP

TO TRANSMISSION

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TRANSMISSION HYDRAULIC SYSTEM SECOND SPEED REVERSE DIRECT DRIVE

2

3

   T    R    O    P    T    S    E    T

PRIORITY VALVE 1

5

IMPELLER CLUTCH SOLENOID VALVE

4

LOCKUP CLUTCH SOLENOID VALVE

TRANSMISSION FILTER

3

2

5

TORQUE CONVERTER OUTLET RELIEF VALVE

TORQUE CONVERTER FILTER

1 TORQUE CONVERTER 4 PUMP TRANSMISSION CONTROL VALVE SUMP

TO TRANSMISSION

- 140 POWER TRAIN ELECTRICAL SYSTEM POWER TRAIN ECM (MAC-14)

INPUT COMPONENTS STIC UPSHIFT, DOWNSHIFT, FORWARD, NEUTRAL, REVERSE

KEYSWITCH

CAT DATA LINK

CONTROL AND MONITOR SYSTEMS

OUTPUT COMPONENTS

STARTER RELAY REDUCED RIMPULL INDICATOR LAMP

REDUCED RIMPULL ON/OFF SWITCH

CLUTCH 1 REVERSE SOLENOID

REDUCED RIMPULL SELECTION SWITCH

CLUTCH 2 FORWARD SOLENOID

RIDE CONTROL ON/OFF SWITCH PARKING BRAKE LIMIT SWITCH QUICK-SHIFT  SWITCH LOCKUP CLUTCH ENABLE SWITCH STEERING/TRANSMISSION LOCKOUT SWITCH TORQUE CONVERTER  PEDAL POSITION TORQUE CONVERTER SPEED

CLUTCH 3 3RD GEAR SOLENOID CLUTCH 4 2ND GEAR SOLENOID CLUTCH 5 1ST GEAR SOLENOID

RIDE CONTROL SOLENOID

IMPELLER CLUTCH SOLENOID

LOCKUP CLUTCH SOLENOID

TRANSMISSION SPEED BACKUP ALARM PARKING BRAKE PRESSURE SWITCH

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