Figure 1-12. Cooling System (Cont)
(6) The WATER TEMP gage (15) on the instrument panel allows you to monitor coolant
temperature. In addition, the high engine temperature indicator (16) on the lighted
indicator display (17) illuminates when the coolant temperature exceeds 230F (110C).
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.