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 TM 55-1905-219-14-5
3-74. LUBE OIL COOLER - MAINTENANCE INSTRUCTIONS.
a. In order to perform its functions satisfactorily the lubricating oil must be kept within the proper
temperature limits. If the oil is too cold, it will not flow freely. If the oil is too hot, it cannot support the bearing
loads, it cannot carry away enough heat, and it may result in too great an oil flow.
b. In performing its lubricating and cooling functions, the oil absorbs a considerable amount of heat and
this heat must be dissipated by an oil cooler.
c. To assure engine lubrication, if the oil cooler becomes clogged, a by-pass valve located at the oil inlet to
the oil cooler by-passes oil around the oil cooler directly to the oil gallery in the cylinder block.
d. The oil cooler core is sealed to prevent the coolant from getting into the oil.
This task covers:
a. Inspection
c. Cleaning
e. Repair
b. Removal
d. Testing - Pressure
f. Installation
INITIAL SETUP :
Test Equipment
References
NONE
Equipment
Special Tools
Condition
Condition Description
Para
NONE
NONE
Material/Parts
Special Environmental Conditions
Gasket, Kit P/N 5192637
Do not drain into bilges,
Gasket, Kit P/N 5193113
dispose of properly.
Personnel Required
General Safety Instructions
1
Observe all CAUTIONS and
WARNINGS.
3-1321
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