ARMY TM 9-6115-670-14&P
2-14
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2.7. OPERATION IN ARCTIC CLIMATE.
Insufficient antifreeze in coolant mix will allow coolant to freeze and cause engine damage. Ensure that
antifreeze, lubricating oil, and diesel fuel are selected for arctic weather climate. When operating in arctic
climate, observe the following:
a. If outside temperatures are below 32°F (0°C), hold ENGINE START/PREHEAT switch in
PREHEAT position for 90 seconds before starting.
b. Ensure that coolant mix has sufficient antifreeze. Maximum protection is obtained by a mixture
of 60% by volume of ethylene glycol to clean water (4.8 pints (0.473 liter) of antifreeze per
gallon (3.785 liters) of solution).
c. Ensure that lubricating oil has proper viscosity for operation at arctic climate. At temperatures
below 32°F (0°C), use SAE 10W or 10W-30.
d. Use DF-A type diesel fuel when operating in arctic temperatures.
2.8. OPERATION IN DESERT CLIMATE.
The APU is subject to damage from dust and dirt in hot, dry climates. Observe the following precautions
when operating the APU in desert climate:
a. Check coolant level on a daily basis. Add coolant if necessary.
b. Keep APU covered as much as possible.
c. After a sand or dust storm, inspect APU for accumulation of sand or dust IMMEDIATELY and
remove accumulated sand and dust.
WARNING
Never place ends of electrical cables or
connectors on the ground. Dirt and moisture can
lead to a faulty electrical connection and create a
shock or fire hazard.
CAUTION
Never use starting agents on engine. Failure to
heed this caution could result in damage to
engine.
