777F Off-Highway Truck Power Train: Hydraulic and Transmission Tank (Torque Converter, Hoist, Brake)

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

The hydraulic tank (torque converter, brake, and transmission) (1) is located on the left side of the frame between the front and rear tires. The transmission section (3) is separated from the torque converter, 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, and brake section (2) supplies oil to the brakes, to the brake cooling system, and to the torque converter system. An air breather for section (2) and an air breather for section (3) are located on the vertical frame member on the left side of the machine.

The torque converter, and brake section (2) has two sight gauges. The top sight gauge is used for checking the oil level during normal operation. The bottom sight gauge is used to check that the machine is safe to start when the body is in the RAISED 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

(1) Torque converter, brake, and transmission hydraulic tank (2) Torque converter and brake section (3) Transmission section (4) Return port for the transmission (5) Drain port for the lip seal case of the parking brake (6) Return port for the hoist valve (7) Return port for brake cooling (8) Return port for brake cooling (9) Return port for the auxiliary brake (10) Return port from torque converter scavenge pump (11) Port for the level switch of the transmission oil (12) Suction port for the brake retract (13) Suction port for the transmission pump (14) Drain port for the parking brake (15) Drain port for the parking brake (16) Suction port for torque converter pump (17) Suction port for the hoist and brake cooling pump (18) Suction port for the auxiliary brake cooling pump section(19) Relief port for the torque converter

Gear Pump (Torque Converter, Transmission)

Gear pump (1) Scavenge pump section for the torque converter (2) Charge pump section for the torque converter (3) Pump section for the torque converter lockup clutch (4) Scavenge pump section for the transmission(5) Charge pump section for the transmission

This pump has five sections:

• Scavenge pump section for the torque converter (1)
• Charge pump section for the torque converter (2)
• Pump section for the torque converter lockup clutch (3)
• Scavenge pump section for the transmission (4)
• Charge pump section for the transmission (5)

The pumps are driven by a gear on the torque converter.

The scavenge section for the torque converter (1) is located on the drive end. This pump section pulls oil from the bottom of the torque converter housing. The oil flows through a scavenge screen and the oil flow is then returned to the hydraulic tank.

The other four pump sections get oil from the hydraulic tank.

The charge pump section for the torque converter (2) sends the oil to the charge oil filter for the torque converter, to the inlet relief valve for the torque converter, and to the torque converter.

The pump section of the torque converter lockup clutch (3) sends oil to the torque converter lockup valve. A portion of the flow goes to the hoist system.

The scavenge pump section of the transmission (4) pulls oil from the bottom of the transmission case. The oil flows through a magnetic screen to the scavenge pump section of the transmission (4). The oil is then returned to the transmission section of the hydraulic tank.

The charge pump section for the transmission (5) takes oil from the transmission section of the hydraulic tank. The oil flows from the charge pump section for the transmission to the transmission oil filter. The oil is then sent to the transmission hydraulic control. The oil is used to activate transmission clutches.

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777F Off-Highway Truck Power Train: Hydraulic and Transmission Tank (Torque Converter, Hoist, Brake) 2013-01-04T15:30:00-08:00 Rating: 4.5 Diposkan Oleh: Unknown