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| Illustration 1 | g00577911 |
(1) Oil cooler (2) Oil cooler (outlet) (3) Inlet from oil cooler bypass valve | |
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| Illustration 2 | g00860571 |
Oil cooler bypass valve (4) Outlet to the tank (5) Outlet to the oil cooler (6) Valve (7) Spring | |
The oil cooler bypass valve is installed at the return oil port of the inlet manifold. When the implement or steering circuits are active, the return oil flows through the bypass valve. Valve (6) and spring (7) cause a back pressure of approximately 270 kPa (39 psi). The back pressure causes the flow of part of the return oil through outlet (5) to the oil cooler. The larger part of the return oil flows through outlet (4) to the tank. The bypass valve opens quickly in order to relieve the increases (surges) of flow of the return oil. The bypass valve keeps pressure increases (spikes) from the oil cooler.