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TM 10-4320-351-14
(3) Clamp exhaust pipe to exhaust manifold.
(4) Connect pumpage overtemperature cable at engine module connection panel connector 1A1J3. Connect
adjacent dust caps together.
(5) Connect fuel supply line and fuel return line at engine module.
Section IV. OPERATION UNDER UNUSUAL CONDITIONS
2.10 OPERATION UNDER EXTREME ENVIRONMENTAL CONDITIONS.
2.10.1 Operation in Extreme Heat.
Operation under conditions of high heat may cause equipment problems due to thermal expansion. Fuel transfer pump
seals are especially subject to damage. Basic system operation is as described in paragraphs 2.4 and 2.5. The following
additional steps and recommendations should be implemented to protect the system to the extent possible.
a. Protect the system from direct sunlight if possible.
(1) Position system components in the shade of trees, buildings, etc. If shade is available only part of the day,
choose afternoon shade.
(2) Use any material available to create shade without blocking air circulation. Keep fabric wet if possible. Do
not block air circulation.
2.10.2 Operation in Extreme Cold.
Operation under conditions of extreme cold may cause equipment problems due to loss of flexibility. Coupling face seals
are especially subject to damage. Basic system operation is as described in paragraphs 2.4 and 2.5. The following
additional stops and recommendations should be implemented to protect the system to the extent possible.
a. General Recommendations.
(1) Fill engine crankcase with MIL-L-46167 OEA (SAE OW-20) lubricating oil. Refer to unit maintenance.
(2) Set up system in area protected from wind, if possible.
(3) Handle all components with care to avoid cracking or fracture.
(4) Remove snow or ice from coupling ends before making connections to prevent entry of foreign material into
system.
(5) Make and break connections slowly and carefully to avoid cracking or splitting of face seals.
b. Engine Cold Start.
NOTE
Under conditions of extreme cold, it is necessary to use the intake heaters to warm
the intake manifold before attempting to start the engine. The amount of warming
required increases as the temperature decreases. At 20° F (-7° C), holding the
intake heaters on for 30 seconds is sufficient; at -25° F (31.7° C ) approximately 2.5
minutes is required.
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