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| Illustration 1 | g00563134 |
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Return Valve (1) Thermal Bypass Valve. (2) Return Manifold. | |
Thermal bypass valve (1) is integral to return manifold (2). The return valve directs the case drain oil and the return oil to either the tank or the hydraulic oil cooler.
Returning oil from the following systems flows to the return manifold (2):
- Propel system
- Vibratory system
- Steering system
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| Illustration 2 | g00563202 |
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Thermal Bypass Valve (3) Cap. (4) Piston. (5) Actuator spring. (6) Pressure relief spring. (7) Valve. | |
Thermal bypass valve (1) is a cartridge type valve. The thermal bypass valve controls the amount of return oil through the oil cooler. Oil flow through the oil cooler is dependent on oil temperature.
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| Illustration 3 | g00732777 |
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Oil Flow To Cooler Graph | |
When the hydraulic oil temperature is below
When the hydraulic oil temperature reaches