ENGINE COOLANT HEATER KIT (Contd)
If heater fails to start, turn RUN-OFF-START switch to OFF position and
repeat steps 5 and 6. Notify your supervisor if heater fails to start after
Check fuel gauge (1). Make sure fuel tank(s) are full if engine coolant heater is to operate for an extended
To shut down engine coolant heater:
Turn RUN-OFF-START switch (3) to OFF.
Remain in vehicle cab to make sure indicator lamp (2) goes out and blower motor shuts down
(approximately 1-3 minutes).
Omit step c if engine is to be started immediately.
Close electric fuel pump shutoff valve by turning valve lever (4) one-quarter turn clockwise. Close two
levers (4) on M939A2 series vehicles.