TM-9-2350-277-34

CARRIER M113A3, M577A3, M1059A3, M1064A3, M1068A3 AND M58

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

TM-9-2350-277-34 - Page 558 of 871

TM 9-2350-277-34

FINAL TEST – COOLANT HEATER — Continued

0077 00

1.

Turn the heater on and run it until the coolant is hot enough to make the heater cycle from high to low heat. Leave the

heater alone, then take the temperature of the coolant. The temperature should be between 140

F (60

C) and 170

F

(76

C). If coolant temperature is not within limits, replace restriction thermostat (WP 0079 00).

2.

After testing the restriction thermostat, close circuit across terminal board terminals No. 4 and No. 5, to make the heater

stay on high heat. Heat the coolant until the heater burning stops. Check the temperature of the coolant, it should be not

less than 220

F (104

C) or more than 250

F (121

C). If the coolant temperature is not within these limits, replace the

overheat thermostat (WP 0080 00).

FOLLOW-THROUGH STEPS

1.

Install coolant heater in carrier (see your -20).

END OF TASK

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