784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Caterpillar


Hydraulic Tank (Torque Converter, Hoist, Brake, and Transmission)

Usage:

785C 1HW


Illustration 1g00317611
(1) Torque converter, hoist, brake, and transmission hydraulic tank
(2) Torque converter, hoist, and brake section
(3) Transmission section

The torque converter, hoist, brake, and transmission hydraulic tank (1) is located on the outside of the right side of the frame. The transmission section (3) is separated from the torque converter, hoist, and brake section (2) by a wall inside the hydraulic tank (1). The transmission section (3) supplies oil for the operation of the transmission. The torque converter, hoist, and brake section (2) supplies oil to the brakes, to the brake cooling system, to the torque converter system, and to the hoist hydraulics. An air breather for section (2) and an air breather for section (3) are located on the vertical frame member on the right side of the truck.

The torque converter, hoist, and brake section (2) has two sight gauges. The top sight gauge is generally used for checking the oil level. The bottom sight gauge can be used when the hoist cylinders are in the RAISE position. The transmission section (3) also has two sight gauges. The bottom sight gauge is used for checking the oil level with cold oil. The top sight gauge is used for checking the oil level with hot oil. See the Operation and Maintenance Manual for lubrication viscosities and for refill capacities for both sections of the hydraulic tank.

Tank Ports



Illustration 2g00486260
(4) Breather ports for the transmission section of the hydraulic tank
(5) Breather port for the torque converter, hoist, and brake section of the hydraulic tank
(6) Return port for the transmission
(7) Return port for the torque converter inlet relief valve
(8) Return port for brake cooling
(9) Return port for the hoist control valve
(10) Return port from torque converter scavenge pump
(11) Drain port for the parking and secondary brake control valve
(12) Drain port for the lip seal case of the parking brake
(13) Drain port for the brake makeup oil tank
(14) Suction port for the transmission
(15) Suction ports for the hoist and rear brake cooling gear pump
(16) This port is not used.
(17) Suction port for torque converter pump
(18) Outlet port to brake cooling system for the rear brakes

Caterpillar Information System:

784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Air/Hydraulic Cylinder (Brake)
583R Pipelayer Power Train Drive Shaft
Challenger 35, Challenger 45 and Challenger 55 Agricultural Tractors Implement, Steering and Brake Hydraulic Systems Purge Service Brakes
784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Brake Hydraulic System
784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Brake Hydraulic System
784C and 785C Off-Highway Trucks Machine Systems Electronic Flasher Assembly - Remove and Install
784C and 785C Off-Highway Trucks Machine Systems Electronic Control (Engine Shutdown) - Remove and Install
5130, 5130B and 5230 Excavators, 784B, 785B, 785C, 789B, 789C, 793B and 793C Off-Highway Truck/Tractors and 992G, 994 and 994D Wheel Loaders Vital Information Management System (VIMS) Diode Assembly - Test
527 Track-Type Skidder Model Views and Specifications
583R Pipelayer Power Train Transmission Control Linkage
3054 Engine Crankshaft Seals
527 Track-Type Skidder Power Train Transmission Oil Filter
784C, 785C and 785C HAA Off-Highway Truck Air System and Brakes Hydraulic Tank (Torque Converter, Pulled Unit, Brake, and Transmission)
784C and 785C Off-Highway Trucks Machine Systems Solenoid Valve (Air Horn) - Remove and Install
784C and 785C Off-Highway Trucks Machine Systems Magnetic Switch (Main Power) - Remove and Install
784C and 785C Off-Highway Trucks Machine Systems Pressure Switch (Parking and Secondary Brake) - Remove and Install
784C and 785C Off-Highway Trucks Machine Systems Pressure Switch (Service Brake and Retarder) - Remove and Install
784C and 785C Off-Highway Trucks Machine Systems Rotary Switch (Fan Speed) - Remove and Install
784C and 785C Off-Highway Trucks Machine Systems Start Switch (Key) - Remove and Install
69D and 769D Off-Highway Trucks and 771D Quarry Truck Machine Systems Relay Valve (Brake) - Remove
784C and 785C Off-Highway Trucks Machine Systems Seat - Remove and Install
784C and 785C Off-Highway Trucks Machine Systems Cable (Heater Control) - Remove and Install
784C and 785C Off-Highway Trucks Machine Systems Electronic Control Module (Power Train) - Remove and Install
D250E Series II and D300E Series II Articulated Trucks Power Train Retarder - Assemble
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.