TM 5-4930-244-14
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2-12. OPERATION IN UNUSUAL ENVIRONMENTIWEATHER. (See Figure 2-34.)
1. PREPARATION FOR USE.
a.
Refer to para. 2-7(2) for procedures.
b.
EXTREME HEAT "DRY”:
(1)
Provide adequate shade or shelter if possible.
(2)
Check hoses and wires for cracking and brittleness. Replace if necessary.
(3)
The engine is air-cooled. Make sure nothing is blocking free air flow around the engine.
c.
EXTREME HEAT "HUMIDITY":
(1)
See steps 1-3 under "b" above.
(2)
To prevent rusting, wipe visible moisture from unit.
d.
EXTREME COLD:
(1)
If possible, shelter the unit from snow and ice.
(2)
Provide a heated shelter if possible.
(3)
Use the heater found in the winterization assembly (see para. 2-12.1.f.).
NOTE
Engine will need more time to warm and crank. Cool lubricants become thick and
will slow down cranking.
(4)
Do not allow moisture to come in contact with lubricants or diesel fuel. Use a filter when filling lube tanks or
diesel fuel tank to prevent contamination.
(5)
Carefully operate knobs and valves. They break easily in cold weather.
(6)
Prevent air line freezing by using the alcohol injector system (see para. 4-18).
(7)
Change engine oil and replace with light oil such as 5W-30, 5W-20, or OW-20. Do not try to start the
engine with standard grade oil. Do not dilute the engine oil with any kind of fuel to "thin" it.
(8)
Make sure that fuel tank is filled with Mdl-Spec Arctic Diesel Fuel. Do not use a diesel fuel that will "wax" or
"gel" in cold temperatures.
(9)
Replace standard heavy oil in air compressor with lighter oil (SAE-10 ND). If heavy oil is left in the
compressor, the engine's performance will drag.
(10)
Before moving the lube unit to sub-zero mission areas, change the fuel filter and circulate new fuel and oil
through the system with the engine at 50% - 70% throttle for15 minutes.
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