TM-9-2350-261-34

CARRIER, M113A2, M577A2, M1064, M1068, M1059 AND M901A1

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL

TM-9-2350-261-34 - Page 550 of 785

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 ANDTHERMOSTATICSWITCH

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 140F(60 C) and 170 F

(76 C). If coolant temperature is not within limits, replace restriction thermostat (WP 0063 00).

007000-7

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