TM 55-2210-223-12
TO 45A2-2-14-41
Section V. OPERATION UNDER UNUSUAL CONDITIONS
2-31. OPERATION IN EXTREME HEAT
Operation in extreme heat puts an added load on the cooling system and necessitates special lubrication and battery
care procedures.
a.
Lubrication. Refer to LO 55-2210-223-12 for proper grade of lubrication.
b.
Cooling System.
(1)
Check coolant level frequently. Make sure the fan is operational and the radiator shutters are fully open.
Make sure no debris clogs radiator.
(2)
Check radiator hoses for signs of deterioration. Make sure there are no leaks around hose clamps or drain
plugs.
(3)
Check radiator for leaks.
(4)
During operation, check temperature gage frequently for signs of overheating (above 198F [92C]).
c.
Batteries. Water in storage batteries evaporates rapidly in high temperature. Have unit maintenance personnel
check batteries frequently and replenish with distilled water (item 4, app E).
2-32. OPERATION IN EXTREME COLD
a.
Lubrication. Refer to LO 55-2210-223-12 for proper grade of lubrication.
b.
Cooling System.
(1)
Have unit maintenance personnel check coolant to see that the proper protection is afforded for the lowest
possible temperature anticipated.
(2)
Check radiator hoses for signs of deterioration. Make sure there are no leaks around hose clamps or drain
plugs. Check radiator for leaks.
c.
Fuel Tank. Drain fuel tank daily as follows:
(1)
Open drain valve in bottom of fuel tank.
(2)
Allow water and sediment to drain into a container.
(3)
Close drain valve.
(4)
Wipe up spills.
(5)
After operation, fill tank.
2-47
