TM 9-2320-260-20
1-19. POWER SYSTEMS OPERATION (Contd)
g. Cooling System Operation.
A SURGE TANK - Filling point for cooling system.
B WATER MANIFOLD - Collects coolant from cylinder heads and directs it to thermostat housing
where it is redirected through system.
C WATER TEMPERATURE SENDING UNIT - Sends signal indicating engine coolant
temperature to gage on instrument panel.
D SURGE TANK-TO-WATER MANIFOLD VENT HOSE - Vents air trapped in water manifold.
E
THERMOSTAT - Shuts off coolant flow to radiator until engine temperature reaches 175F
(79C). Coolant is then directed to radiator.
F
SURGE TANK-TO-RADIATOR VENT HOSE - Vents air from cooling system.
G RADIATOR INLET TUBE - Directs coolant from water manifold to radiator after thermostat
has opened.
H RADIATOR FAN SHROUD - Permits a greater concentration of air to be drawn through
radiator.
I
RADIATOR - Directs coolant through a series of fins or baffles so air can remove excessive heat
J
from coolant.
K ENGINE OIL COOLER - Removes excessive heat from engine oil.
L
RADIATOR OUTLET TUBE - Directs coolant from radiator to engine oil cooler.
M BYPASS TUBE - Directs coolant back to engine oil cooler where it is then recirculated through
engine until thermostat opens.
N SURGE TANK-TO-ENGINE OIL COOLER HOSE - Directs coolant to engine oil cooler when
filling the system.
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