TM-9-2350-261-34 Direct and General Maintenance Manual M113A2 M577A2 M1064 M1068 M1059 M901A1 Download
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TM 9-2350-261-34 FINAL TEST - COOLANT HEATER — Continued 0070 00 10. Turn the heater control switch to OFF. Fuel flow and burning should stop in about 30 seconds. Blower should continue to run from 1 to 3 minutes and then stop. If blower does not work within limits, readjust the flame detector switch (see your -20). If the blower still fails to work within limits, replace the flame detector switch (see your -20). TESTING RESTRICTION THERMOSTAT AND THERMOSTATIC SWITCH NOTE Thermostat shown in fuel control valve is set to open at 70 F (21 C) and to close at 30 F (-1 C). If temperature is below 70 F (21 C), the heating element in fuel control valve can be energized during any operational cycle. 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 0063 00). 0070 00-7 º º º º º º º º º º º