TM 5-3805-255-14
0006
OPERATION IN EXTREME COLD CONTINUED
6. Engine Operation.
a. Before starting, ensure fuel and oil in engine and transmission are thin enough to flow.
b. If oil drips from engine oil level dipstick, oil is thin enough for engine to be started.
CAUTION
Low idling speeds during extremely cold temperatures can result in incomplete
combustion and heavy deposit formations on valves. These deposits can cause burned
valves, bent pushrods, or other damage to valve components.
c.
After engine has started, allow engine time to reach operating temperature. Run engine at reduced speed
only long enough to circulate oil through engine. Then increase engine speed and warm up engine.
d. Cover radiator, if necessary, to bring engine up to operating temperature.
7. Machine Operation.
a. When moving out, be alert that tires may be frozen to ground.
b. Test brakes and machine controls carefully.
c.
Move all hydraulic controls slowly to warm hydraulic oil. Cycle each control several times. Normal warmup
period in extreme cold is 30 minutes.
d. Operate under a light load for the first 5 minutes of operation.
e. Start driving very slowly for about 100 yd (91.4 m). If a problem is noted, notify Field Maintenance as
required.
8. Parking Machine.
a. If machine will be parked for a short period, park in a sheltered area out of wind. If shelter is not available,
park machine so that radiator does not face into wind.
b. If machine will be parked for a long shutdown period, try to park on high ground. Keep tires out of snow,
water, ice, and mud, if possible.
c.
Clean snow, ice, and mud from engine compartment, hydraulic cylinders, wheels, and work tool as soon as
possible after shutdown.
d. If machine will be parked for a long period of time, notify Field Maintenance to prepare machine for
storage.
e. Ensure tires are properly inflated.
END OF TASK
0006-4