TURN COOLANT HEATER O N

O P E R A T E E N G I N E C O O L A N T H E A T E R BELOW -25F (-31C)

TM-9-2350-261-10 Recovery Vehicle Full Tracked: Medium M88A1 NSN 2350-00-122-6826 Winch Power Takeoff and Hoist System Manual
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TM 9-2350-261-10 CAUTION Overheating will damage batter- ies. Do not use coolant heater if temperature is above -25°F (-31°C). Carrier batteries can discharge. Do not operate earner lights, radios, or other electrical equipment while coolant heater is running. 4. Press PRESS-TO-TEST switch. Check that indicator light comes on. 5. Move RUN-OFF-START switch to START. Hold switch in START until indicator light comes on. 6. Move RUN-OFF-START switch to RUN as soon as indicator light comes on. Do not stop in OFF position. 7. If coolant heater does not start, repeat steps 4 and 5 above. If coolant heater does not start after three tries, troubleshoot heater (page 3-15). NOTE Coolant heater always starts at low heat. It switches to high heat if HI-LO switch is set at HI. 8. Move HI-LO switch to HI or LO. NOTE When HI-LO switch is at HI, heater will automatically go to low heat if coolant temperature reaches 190°F (88°C). It will go back to high heat if coolant temperature drops to 120°F (49°C). If coolant reaches a temperature of 245° to 260°F (118° to 126°C), heater will stop and must be restarted. 2-236

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