ROTATOR GP-HYD 4828779 - Caterpillar

Illustration 1 g01406354
(1) Hydraulic oil cooler (2) Transmission oil cooler (3) Fuel coolerHydraulic oil cooler (1) is located directly in front of the hydraulic fan. The hydraulic oil cooler provides cooling for all hydraulic systems that use oil from the hydraulic oil tank.The hydraulic oil cooler is located next to transmission oil cooler (2) .The hydraulic oil cooler keeps the hydraulic oil at the correct operating temperature.
Illustration 2 g01400259
(1) Hydraulic oil cooler (4) Axle oil cooler pump and motor (5) Fan motor (6) Hydraulic oil cooler bypass valve (7) Hydraulic oil filterOil flows from hydraulic fan motor (5) to hydraulic oil cooler (1) via axle oil cooler pump and motor (4). After the oil is cooled, the oil flows to hydraulic oil filter (7). Then, the oil is returned to the tank.If the pressure differential between the inlet and the outlet of the hydraulic oil cooler exceeds 448 kPa (65 psi) without the axle oil cooler or 827 kPa (120 psi) with the axle oil cooler, the hydraulic oil cooler bypass valve (6) will divert oil around the hydraulic oil cooler.The following conditions could cause the hydraulic oil cooler bypass valve to divert oil around the hydraulic oil cooler:
Cold hydraulic oil
Restriction in a hydraulic oil line
Restriction in the hydraulic oil cooler