3064 and 3066 Engines for Caterpillar Built Machines Caterpillar


Engine Oil Bypass Valve

Usage:

320B L 1ES



Illustration 1g00530801

Note: The oil bypass valve is mounted inside the oil pan along the rail of the oil pan.

(1) Valve seat

Check the valve and the valve seat for abnormal contact patterns.

(2) Spring

Inspect the spring for weakness or damage. Free length of spring ... 83.5 mm (3.29 inch)

Opening pressure of the bypass valves that are equipped on the 3066 engine

Primary bypass valve ... 1177 ± 98 kPa (171 ± 14 psi)
Secondary bypass valve ... 981 ± 98 kPa (142 ± 14 psi)

Opening pressure of the bypass valve that is equipped on the 3064 engine ... 981 ± 98 kPa (142 ± 14 psi)

Tighten the oil bypass valve to the following torque. ... 69 ± 5 N·m (51 ± 4 lb ft)

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