TM 5-3805-290-10
OPERATION UNDER UNUSUAL CONDITIONS - CONTINUED
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OPERATION IN EXTREME COLD - CONTINUED
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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 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 refuelling. If equipped with an arctic cold weather starting aid system,
turn engine coolant heater off.
N OT E
Ensure portable fire extinguisher is within reach prior to refueling.
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 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 to -40F (-32 to -40C), are equipped with an arctic cold weather
starting aid system. Refer to Arctic Cold Weather Starting Aid System later in this work package 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.
7.
Machine Operation.
a.
When moving out, be alert that tires may be frozen to ground.
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