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TM 55-1905-219-14-5
3-76. EXPANSION TANK AND WATER CONNECTIONS - MAINTENANCE INSTRUCTIONS.
a. The expansion tank (heat exchanger) provides a means of filling the engine cooling system as well as
space for expansion of the coolant as its temperature rises. An over flow pipe, attached near the top of the
tank, provides a vent to the atmosphere.
b. In this system the hot coolant flows from the water manifold to the expansion tank (heat exchanger)
and down through the vertical cells of the heat exchanger core, while raw water flows horizontally between the
cells and lowers the temperature of the coolant. The coolant is then circulated through the cylinder block and
head by the fresh water pump.
c. The engine coolant level should be maintained near the top of the expansion tank (heat exchanger).
d. The expansion tank (heat exchanger) receives coolant from the water manifold, exhaust manifold and
raw water pump. The expansion tank (heat exchanger) returns coolant to the system thru the fresh water pump
and lube oil cooler.
This task covers:
a. Inspection
c. Cleaning
b. Removal
d. 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
NONE
3-1342
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