TM 9-2350-277-10
OPERATE ENGINE COOLANT HEATER (BELOW 25 F (31 C)) -- Continued
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2.
Open coolant heater fuel supply valve.
CAUTION
Overheating will damage batteries. Do not use coolant heater if temperature is above 25 F
(31 C).
Carrier batteries can discharge. Do not operate carrier lights, radios, or other electrical
equipment while coolant heater is running.
3.
Press PRESS-TO-TEST switch. Check that indicator light comes on.
4.
Move RUN-OFF-START switch to START. Hold switch in START until indicator light comes on.
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