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Page Title: Section II. OPERATION UNDER UNUSUAL CONDITIONS
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TM 10-3930-242-12
STOP  CONTROL  down.  The
NOTE
EMERGENCY STOP CONTROL reset
To restart the engine after the
lever, located on left side of engine must
EMERGENCY STOP CONTROL has
be pushed toward the cylinder block.
been used, push the EMERGENCY
foreign materials. If fuel filters requir servicing,
2-6. Operation in Extreme Cold (below 0F.
report to organizational maintenance.
(18 C))
f . Lubricate in accordance with current
a. Check coolant level and add coolant as
lubrication chart (fig. 3-1).
specified in table 2-1. Have organizational main-
g. Pull up on either primer button, engage starter,
tenance perform specific gravity test to make sure
and with the engine turning, press the ether button
that antifreeze solution is correct for lowest tem-
down. If combustion does not occur, repeat the
perature expected.
priming process with the starter engaged.
b. Inspect cooling system. Correct or report any
h. In extremely cold weather it is advisable to
leaks.
give the engine one priming charge before engaging
c. Keep batteries fully charged. After adding
the starter. Then proceed as in g above.
distilled water to the batteries, run the engine for at
i. Allow the engine to reach normal operating
least 15 minutes.
temperature before applying load.
d. Keep fuel tank full when not in operation.
e. Drain secondary fuel filters of water and
Table 2-1. Freezing Points, Composition, and Specific Gravities of Military Antifreeze Material
Lowest
Pints of
expected
inhibited
Ethylene glycol
Compound, antifreeze2
ambient
glycol per
coolant solution
gallon of
temp
specific  gravity
coolant1
F.
at 68 F.
11/2
+20
Issued full strength and ready mixed for 0 to 65 F temperatures
1.022
for both installation and losses.
+10
1.036
2
0
2
1.047
3
10
1.055
20
3
1.062
4
30
1.067
4
40
1.073
Arctic
50
60
antifreeze
75
preferred
1
Maximum protection is obtained at 60 percent by volume (4.8 pints of ethylene glycol per gallon of solution).
2
Military Specification M IL-C-11755 Arctic type, non-volatile antifreeze compound is intended for use in the cooling system of
liquid cooled internal combustion engines. It is used for protection against freezing primarily in Arctic regions where the ambient
temperature remains for extended periods of time close to 40 F., or below, to as low as 90 F.
` Use an accurate hydrometer. To test hydrometer, use 1 part ethylene glycol type antifreeze to 2 parts water. This should produce a
hydrometer reading of 0 F.
2-7. Starting Aid
(2) perform normal starting procedures (para
2-3).
a. General The starting aid is a pressurized
(3) If engine  fails  to  start,  refer  to
system used to inject a highly volatile fluid into teh
troubleshooting table (table 3-2).
engine air intake system. This is to facilitate
starting when ambient temperatures are below
2-8. Operation in Extreme Heat
40 F. The replaceable pressurized cylinder contains
WARNING
sufficient fluid for 75-150 starts.
Be extremely careful when removing the
b. Operating the Starting Aid.
radiator filler cap of a hot engine. Release
(1) Operate starting aid control for about 2
of pressure may cause violet boiling and
seconds. Wait 3 seconds before cranking engine.
serious injury to personnel.

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