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 TM 55-1905-220-14-4
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:
a. Inspection
b. Removal
c. Installation
INITIAL SETUP :
Test Equipment
References
NONE
NONE
Equipment
Special Tools
Condition
Condition Description
Torque wrench
Removing Oil Pan.
Pump, Hand NSN-
Material/Parts
Special Environmental Conditions
Gasket kit
Do not drain oil into bilges. Use
P/N 5196375
oil/water separation system to
collect drained oil.
Personnel Required
General Safety Instructions
1
NONE
LOCATION
ITEM
ACTION
REMARKS
INSPECTION
1. Relief
All parts
Inspect for scoring or pits
Replace re-
valve
on valve body and pits or
lief valve
fracture on springs.
if damaged.
3-788
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