TM 9-2320-392-10-1
M1083A1 SERIES THEORY OF OPERATION - Continued 0003 00
COOLING SYSTEM - Continued (Vehicle S/N 18,550 to 99,999)
7.
Positioning the engine fan off switch to the on position keeps the engine fan from
engaging while fording water more than 30 in. (76 cm) deep.
8.
Cooling capacity for the transmission is increased by the use of a transmission
auxiliary oil cooler. An electric fan provides airflow through the oil cooler core. The
WATER TEMP gage on the instrument panel assembly allows you to monitor coolant
temperature. In addition, the COOLANT TEMP indicator on the lighted indicator
display illuminates when the coolant temperature exceeds 230 F (110 C). When
the personnel heater is in use, warm coolant is used to heat the air in the cab before
being returned to the radiator. Otherwise, coolant is returned directly to the radiator
to be cooled.
0003 00-15
