3-36. LUBRICATING OIL PRESSURE RELIEF VALVE - MAINTENANCE INSTRUCTIONS.
a. Oil leaving the pump under pressure passes into the pressure relief valve housing. The spring-loaded
valve opens when the pressure exceeds approximately 120 psi (827.4 kPa) and directs the excess oil to the oil
pan. The pressure relief valve is located at the lower end of the vertical oil gallery near the front of the cylinder
block on the oil cooler side.
b. The pressure relief valve consists of a valve body, a hollow piston-type valve, two springs (one located
inside the other), a spring seat, and a pin to retain the valve assembly within the valve body.
This task covers:
INITIAL SETUP :
Removing Oil Pan.
Pump, Hand NSN-
Special Environmental Conditions
Do not drain oil into bilges. Use
oil/water separation system to
collect drained oil.
General Safety Instructions
Inspect for scoring or pits
on valve body and pits or
fracture on springs.