HARNESS AS-CONTROL 3916315 - Caterpillar

Illustration 1 g01983138
(1) Oil coolers for the rear brake
(2) Oil cooler for the front brake The oil coolers for the hoist and brake cooling are located on the right side of the machine in front of the hydraulic tank. Oil coolers (1) are used to cool the oil for the rear brakes. Oil cooler (2) is used to cool the oil for the front brakes.Oil coolers (1) and oil cooler (2) are cooled by engine coolant. Engine coolant flows from the water pump and through the oil coolers. The engine coolant is then returned back to the engine block.The gear pump for the hoist and for brake cooling sends oil to the control valve. When the control valve for the hoist and for brake cooling is in the HOLD position or in the FLOAT position, the oil flows through the brake oil coolers and to the brakes. The relief valves for the hoist and brake cooling are located in the hydraulic tank. Oil cooler relief valves are located on the outlet line of the brake cooling pump. The relief valve prevents excessive pressure from the gear pump. The relief valve opens when the oil pressure exceeds the relief pressure.Refer to System Operations, "Brake Cooling System" for additional information on brake cooling.