STRAINER GP-WATER 2560780 - Caterpillar

Illustration 1 g01389567
(1) Differential gearbox (2) Orifice (3) Hydrostatic motor (4) Hydrostatic pump (5) Gear pump assembly (6) Hydraulic fan motor (7) Engine (8) Implement pump (9) Steering pump (10) Charge pump (11) Hydraulic oil filter (12) Hydrostatic pump control manifold
Illustration 2 g01389695
(4) Hydrostatic pump (8) Implement pump (9) Steering pump (10) Charge pumpThe pilot hydraulic system receives oil from the charge pump (10). The implement pump (8), the steering pump (9), and the charge pump (10) are three pumps that are bolted together as one unit. The charge pump (10) is the rear section of the gear pump assembly (5). The pilot oil flows from the charge pump to the hydraulic fan motor (6). As the cooling fan is turning, the discharge oil from the fan motor flows through the hydraulic oil filter (11) to the hydrostatic pump (4), the differential gearbox (1), and the orifice (2) .The pilot oil provides charge oil for the hydrostatic pump (4) and pilot oil for the hydrostatic pump control manifold (12) .The orifice (2) is connected to the "U" port on the hydrostatic piston motor (4). The Hydraulic oil flows from the orifice (2) through port "U" and to the motor bearings in order to cool the motor bearings. Oil from the motor bearings flows through the motor case drain to the hydraulic tank.The pilot hydraulic system also provides oil to the differential gearbox (1). The hydraulic levers on mechanical controls can be locked by inserting a pin in front of the joystick. The pin prevents movement of the levers. Refer to Operation and Maintenance Manual, SEBU8028, "906H, 907H and 908H Compact Wheel Loaders", "Operator Controls" for additional information.