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 TM 10-3930-644-14&P
3. Overheating: If the engine overheats from lack
C. SERVICE
of coolant, do not add fresh coolant immediately.
Wait until the boiling has ceased and the engine
1. Summer: in warm weather keep the cooling
has cooled down. Then add coolant slowly, with
system filled with clean, soft water or rain water.
the engine running. If a cold coolant is poured
If permanent antifreeze is not available and hard
into the system when the engine is hot, the
water is used, the hard water should first be
sudden temperature change may damage the
treated with a water softener. Eight ounces of a
radiator, cylinder block or cylinder head.
reliable commercial rust Inhibitor (soluble oil)
should be added to the coolant during warm
4. Protection:
Keep cylinder head capscrews,
weather operation.
water pump capscrews, hose clamps and all
fitting connections tight.
All leaks must be
2. Winter: in winter weather use a nonevaporating
corrected as soon as they are evident. Inspect
ethylene glycol base antifreeze solution in the
hoses carefully and replace if they are
cooling system to protect against damage from
deteriorated.
freezing.
5. Fan Belt: It is very important to occasionally
After the cooling system has been thoroughly
inspect the fan belt, making certain that no oil or
cleaned and inspected, determine the quantity of
grease is accumulating on it and that the fan belt
anti-freeze required for the lowest anticipated
tension is kept in correct adjustment. Replace a
temperature by referring to the protection chart
badly worn, burned, oil or grease soaked belt.
furnished by the manufacturer. Add this quantity
Be sure correct type of belt is used.
to the radiator.
Then fill complete cooling
system; but do not overfill. Run the engine to
6. Thermostat:
Maintaining the correct engine
thoroughly mix the water and the anti-freeze,
temperature depends mainly on the proper
and to allow the coolant to reach operating
function of the thermostat. If the engine
temperature. Finally, test the coolant with an
temperature remains consistently below normal,
ethylene glycol hydrometer to make sure it will
the thermostat should be removed and
withstand
the
prevailing
or
anticipated
inspected.
If corroded or stuck, a new
temperature.
See chart below for correct
thermostat must be installed.
solution.
CAUTION
CAUTION
Do not operate engine without
Never mix anti-freeze com pounds or
thermostat installed! On Teledyne
inhibitors
with
any
cleaning
neutralizing, or flushing compounds.
Continental engines the thermostat
forms an important function in
Temperature Range Parts Glycol
to
Parts
Water
achieving
proper
coolant
flow
through the radiator.
The engine
32 to 10F
1
4
should never be operated without a
+10 to -10F
2
5
thermostat installed, as severe
-10 to -30F
1
1
overheating and serious engine
damage can result.
M-155-1
2-40
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