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| Illustration 1 | g00814174 |
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(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 brake | |
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| Illustration 2 | g00814197 |
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(6) Spring
(7) Oil inlet passage (8) Spool (9) Air inlet (10) Outlet passage to the oil cooler bypass (11) Outlet passage to the oil cooler | |
The torque converter and front brake cooling diverter valves (1) and (4) are behind the engine above the torque converter.
When the service brakes are applied or when the retarder is used, torque converter and front brake cooling diverter valves (1) and (4) will send the cooling oil through torque converter and front brake cooling oil coolers (2) and (5). If the front brakes are not being used, the cooling oil will flow through the oil cooler bypass.
Oil from the torque converter and front brake cooling screen and from the parking and secondary brake valve enters oil inlet passage (7). When the service brakes are applied or the retarder is used, signal air flows to air inlet (9). The air moves spool (8) against the force of spring (6). When spool (8) shifts, oil from passage (7) flows to outlet passage (11). The oil is sent through torque converter and front brake cooling oil cooler (2) and (5). If the service brakes and the retarder are not being used, no air will flow to air inlet (9). Oil flow from oil inlet passage (7) flows to outlet passage (10). The oil will bypass torque converter and front brake cooling oil cooler (2) and (5) and flow to passage (10).