TM 9-2320-303-10
2-33.
OPERATE IN EXTREME COLD (Con't).
b.
Operate Arctic Heater (if equipped).
NOTE
· Arctic heater is used to provide engine preheating for engine startup
in extreme cold. It is also used to provide personnel heat. When
heater is required to preheat engine coolant and engine block before
startup, it should be turned on 1/2-1 hour before engine is started.
· Auxiliary heater (AUX HTR) indicator light illuminates only when
burner is lit. Indicator light turns on and off automatically.
(1)
Place mode control lever (3) to HEAT.
(2)
Place AUX HTR switch (2) in ON position. Green light in switch will
illuminate. AUX HTR light (1) will light when combustion starts after approximately 50
seconds.
NOTE
If HI-LO switch is set to HI position, heater will automatically switch to
low heat when temperature of coolant at heater inlet reaches 176°F
(80°C). LO position is suitable when heater operates over an extended
period.
(3)
Place HI-LO switch (4) to desired setting.
(4)
To turn heater off, place AUX HTR switch (2) to OFF position. Heater
burner will stop and AUX HTR light will go out within a few minutes. Blower will continue to
run for approximately 90 seconds.
2-34.
OPERATE IN EXTREME HEAT.
a.
General. During very hot weather, driving procedures may require altering to
prevent vehicle overheating. Avoid continuous high speeds, long, hard pulls, and continuous
operation in soft terrain.
2-93
