TM 9-2320-211-10-1
WARNING
When engine temperature is above 180F use extreme
care in taking off cooling system filter cap so that
you do not get burned/scalded or both.
a. General. Continuous operation of truck at high speeds, or under long hard
pulls in low gear ratios on steep grades or in soft terrain may cause engine to over-
heat. Try not to use low gear ratios for long periods, when possible. Always watch
for overheating. Halt equipment for a cooling-off period whenever necessary and
tactical situation permits.
Cooling System.
b.
WARNING
When engine temperature is above 195F, use
great care in taking off cooling system filler cap
so that you do not get burned.
CAUTION
Do not add coolant to a hot engine unless the
engine is running. You may damage the engine
if you do not obey this caution.
Scale and rust forms quicker in extremely high temperatures. Always add corrosion-
inhibiter compound to cooling liquid. Do not use water that contains alkali. Fill
radiator with rain water whenever possible. Refer to TB 750-651 for engine cleaning
compound to be used.
(1)
Check cooling system often. Look for following:
(a) Proper coolant level in radiator.
(b) Leaking hose connections.
(c) Proper fan belt tension.
(d) Cracked or leaking hose lines.
(2) If engine is always overheating, check and clean radiator fins with
compressed air to get rid of sand, dust, and insects.
(3) If engine still overheats, tell organizational maintenance.
c.
Batteries.
(1) In very hot zones check level of electrolyte in battery cells daily. If
they are low, add distilled water. If distilled water is not available, use rain or
drinking water. Use of water with a high mineral content will damage batteries.
NOTE
The use of water with high mineral content will do
less damage to a battery than letting electrolyte level
drop below the plates. A battery left dry has a short
life.
