TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
COOLING SYSTEM - Continued
3.
A radiator overflow tank is provided to allow for expansion of the coolant. The
radiator overflow tank also serves as the point where new coolant is introduced into
the cooling system. The radiator overflow tank has two sight glasses. The upper
sight glass indicates the coolant level to fill to with engine shut down. If coolant is
not visible in the lower sight glass, do not operate the vehicle.
4.
The engine fan, with pneumatic fan clutch, is activated by the water temperature
sensor. Whenever this sensor detects a high engine temperature condition, air
pressure is removed from the fan clutch and the engine fan is engaged.
0003 00-13
