WHEEL 2764684 - Caterpillar

Illustration 1 g00814174
(1) Diverter valve for the left front brake (2) Oil cooler for the left front brake (3) Screen (4) Diverter valve for the right front brake (5) Oil cooler for the right front brakeTorque converter and front brake cooling oil coolers (2) and (5) are located behind the engine above the torque converter. Engine coolant from the water pump flows through the torque converter and front brake cooling oil coolers. Then, the engine coolant flows back to the cylinder block.The front brakes are cooled by oil. The cooling oil for the right front brake comes from diverter valve (4). Diverter valve (4) gets oil through lines from the screen mounted of the left side of the frame. Oil to the screen comes from the torque converter outlet relief valve. Some of the oil from the torque converter outlet relief valve goes for lubrication of the oil pump drive. The cooling oil for the left front brake comes from diverter valve (1). Diverter valve (1) receives oil through lines from the last section of the torque converter pump (front brake cooling). Oil also comes through lines from the parking brake valve bypass. The oil for diverter valve (1) passes through screen (3) before entering oil cooler (5) .When the service brakes are applied or when the retarder is used, diverter valves (1) and (4) will send the oil through oil coolers (2) and (5) to the front brakes. When the front brakes are not used the oil is sent straight to the front brakes. The oil is not sent through the oil coolers.Balance lines maintain an equal pressure between the oil coolers. Lines come from the outlet side of the screen (3) and supply oil to the torque converter outlet relief valve.