TM-9-2350-277-34 Direct and General Maintenance Manual M113A3 M577A3 M1064A3 M1068A3 M58 Download
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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 0077 00-7/8 blank