TM 5-3805-291-10
OPERATION UNDER UNUSUAL CONDITIONS - CONTINUED
0006 00
OPERATION IN EXTREME COLD - CONTINUED
3.
Fuel System.
WARN I N G
DO NOT smoke or permit any open flame in area of machine while you are servicing fuel system. Be sure hose
nozzle is grounded against filler tube during refueling to prevent static electricity. Failure to follow this
warning may result in injury or death to personnel, or damage to equipment.
Operating personnel must wear fuel-resistant gloves when handling fuels. If exposed to fuel, promptly wash
exposed skin and change fuel-soaked clothing.
ALWAYS stop engine prior to refueling. If equipped with an arctic cold weather starting aid system, turn
arctic heater off.
a.
Do not allow fuel tank to remain partially empty in extremely cold weather. Fill fuel tank after each work period to
help avoid water condensation in tank (WP 0013 00).
b.
Remove all ice and snow from around fuel filler opening before refueling.
c.
Regularly drain water and sediment from fuel/water separator.
4.
Electrical System.
a.
Inspect battery cables, wiring harnesses, and wiring.
b.
Check for breaks or cracks caused by cold weather. Report any problems found to Unit Maintenance.
c.
Save batteries. Use lights and other electrical equipment as little as possible when engine is not running.
5.
Lubrication.
Use lubricants as specified at the end of PMCS (WP 0012 00) with the temperature range that applies to the lowest
expected ambient temperature.
6.
Engine Operation.
a.
Machines operating in arctic conditions, from -25 F to -40 F (-32 C to -40 C), are equipped with an arctic cold
weather starting aid system. Refer to Arctic Cold Weather Starting Aid System on the next page for engine starting
procedures.
b.
Before starting, ensure fuel and oil in engine and transmission are thin enough to flow.
c.
If oil drips from engine oil level dipstick, oil is thin enough for engine to be started.
CAU T I ON
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.
d.
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.
e.
Cover radiator, if necessary, to bring engine up to operating temperature.
0006 00-8
