784B Tractor and 785B Off-Highway Truck Power Train Caterpillar


Torque Converter Hydraulic System

Usage:

785B 6HK



Illustration 1g00355472



Illustration 2g00546185

Schematic for torque converter system

(2) Parking brake release pump section

(3) Parking brake release hydraulic filter

(4) Torque converter charging pump section

(5) Torque converter hydraulic filter

(7) Passage to the parking and secondary brake valve

(8) Passage from the lockup clutch solenoid

(9) Torque converter scavenge pump section

(10) Passage to the transmission lubrication system

(11) Torque converter, hoist, and brake section of the hydraulic tank

(12) Screen

(13) Scavenge screen

(14) Torque converter

(15) Pressure reduction valve in the lockup clutch and synchronizing valve

(16) Relay valve in the lockup clutch and synchronizing valve

(17) Passage to the torque converter and front brake cooling diverter valve

(18) Torque converter inlet relief valve

(19) Lockup clutch for the torque converter

(20) Torque converter housing

(21) Torque converter outlet relief valve

(22) Torque converter and front brake cooling screen

(23) Bypass switch

(24) Shuttle valve in the lockup clutch and synchronizing valve

(25) Modulation reduction valve in the lockup clutch and synchronizing valve

(26) Load piston in the lockup clutch and synchronizing valve

(27) Selector piston in the lockup clutch and synchronizing valve

(28) Pump drive

(29) Torque converter lockup clutch and synchronizing valve

(AA) Pressure tap for torque converter inlet pressure

(BB) Pressure tap for torque converter outlet pressure

(CC) Pressure tap for pilot oil of the lockup clutch and synchronizing valve "RV"

(DD) Pressure tap for maximum pressure of the lockup clutch "LU"

(EE) Pressure tap for pump pressure of the parking brake release pump "PMP"

Location Of Components




Illustration 3g00358252

Top view of oil lines for the torque converter

(2) Parking brake release pump section

(4) Torque converter charging pump section

(5) Torque converter hydraulic filter

(9) Torque converter scavenge pump section

(11) Torque converter, hoist, brake, and transmission hydraulic tank

(18) Torque converter inlet relief valve

(20) Torque converter housing

(21) Torque converter outlet relief valve

(29) Torque converter lockup clutch and synchronizing valve

(30) Lockup clutch solenoid




Illustration 4g00358253

Side view of oil lines for the torque converter

(2) Parking brake release pump section

(4) Torque converter charging pump section

(9) Torque converter scavenge pump section

(11) Torque converter, hoist, brake, and transmission hydraulic tank

(18) Torque converter inlet relief valve

(20) Torque converter housing

(21) Torque converter outlet relief valve

(29) Torque converter lockup clutch and synchronizing valve

(30) Lockup clutch solenoid




Illustration 5g00361632

Rear of the torque converter housing

(16) Relay valve in the lockup clutch and synchronizing valve

(18) Torque converter inlet relief valve

(20) Torque converter housing

(21) Torque converter outlet relief valve

(29) Torque converter lockup clutch and synchronizing valve

(AA) Pressure tap for torque converter outlet pressure

(BB) Pressure tap for torque converter inlet pressure

(CC) Pressure tap for pilot pressure of lockup clutch "RV"

(DD) Pressure tap for maximum pressure of lockup clutch "LU"

(EE) Pressure tap for pump pressure of the parking brake release pump "PMP"

Caterpillar Information System:

784B Tractor and 785B Off-Highway Truck Power Train Pressure Switch (Secondary Brake and Parking Brake)
789B Off-Highway Truck Power Train Lockup Clutch and Synchronizing Valve (Torque Converter)
966G Wheel Loader and 972G Wheel Loader Power Train CID 0795 FMI 07 Relay (Secondary Steering Intermediate) Improper Mechanical Response - Test
966G Wheel Loader and 972G Wheel Loader Power Train CID 0794 FMI 07 Pressure Switch (Secondary Steering) Improper Mechanical Response - Test
Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Three-Pin Power Connection
IT14G Integrated Toolcarrier and 914G Wheel Loader Braking System Priority Valve
Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Mounting and Dismounting
572R Pipelayer Transmission Hydraulic Control
Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Leaving the Machine
Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Stopping the Engine if an Electrical Malfunction Occurs
Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Stopping the Machine
Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Stopping the Engine
966G Wheel Loader and 972G Wheel Loader Machine Systems Window Wiper and Wiper Motor (Front) - Install
550, 570 and 580 Wheel Harvesters Boom and Stick Linkage - Lubricate
517 Track-Type Skidder Track Adjustment - Adjust
950G and 962G Wheel Loaders and IT62G Integrated Toolcarrier Machine Systems Steering Cylinder (Left Side) - Remove
789B Off-Highway Truck Power Train Lockup Clutch and Synchronizing Valve (Torque Converter)
793B Off-Highway Truck Air System and Brakes Screen (Torque Converter and Front Brake Cooling)
572R Pipelayer Power Train Hydraulic System
784B Tractor and 785B Off-Highway Truck Power Train Pressure Switch (Service Brake and Retarder)
966G Wheel Loader and 972G Wheel Loader Machine Systems Window Wiper and Wiper Motor (Rear) - Remove
784B Tractor and 785B Off-Highway Truck Power Train Transmission Hydraulic System
950G and 962G Wheel Loaders and IT62G Integrated Toolcarrier Machine Systems Steering Cylinder (Left Side) - Install
950G and 962G Wheel Loaders and IT62G Integrated Toolcarrier Machine Systems Steering Cylinder (Right Side) - Remove
Back to top
The names Caterpillar, John Deere, JD, JCB, Hyundai or any other original equipment manufacturers are registered trademarks of the respective original equipment manufacturers. All names, descriptions, numbers and symbols are used for reference purposes only.
CH-Part.com is in no way associated with any of the manufacturers we have listed. All manufacturer's names and descriptions are for reference only.