T M 9 - 2 3 2 0 - 2 7 9 - 1 0 -1
Operation Under Unusual Conditions (Cont)
2 - 3 5 . O P E R A T E V E H I C L E I N D E S E R T E N V I R O N M E N T .
N O T E
FM 90-3 contains detailed instructions for living and
working in desert.
a. Principles for operating in extreme heat and extreme dust, sand, or mud
apply to desert environment (para 2-32, 2-33, and 2-34).
b. Temperatures may change as much as 70 degrees between day and night.
These changes may damage equipment if vehicle is not properly prepared.
(1) Due to expansion and contraction of all fluids and air, care should be
taken when filling fuel tank and fluid reservoirs to prevent overflow
when temperatures change.
(2) Precision instruments may be affected by temperature changes and
may need adjustment more often.
2 - 3 6 . O P E R A T E V E H I C L E I N C O L D E N V I R O N M E N T ( 3 2 ° F , 0 ° C T O
- 2 5 ° F , - 3 2 ° C ) .
C A U T I O N
l Before
operating
vehicle
in
severe
cold
environment
make sure it has been prepared as described in
FM 9-207. Refer to FM 31-70, FM 31-71, and
FM 21-305 for additional information on operation in
cold environment.
l Watch instrument panel closely. If there are any
unusual readings, stop vehicle and shut off engine.
Check immediately.
l Park in shelter when possible. If shelter is not
available, park so vehicle does not face wind. Place
planks or brush under wheels so vehicle will not
freeze in place.
l Fuel filter should be drained before topping off fuel
tank. Keep fuel tank as full as possible during cold
operations. Water forms in empty fuel tank as it
cools. Water in fuel system could freeze and block
system.
l All snow and ice should be removed from vehicle as
soon as possible. Snow and ice may slow or stop
movement of critical parts if allowed to pile up.
l Special care must be used during operations in cold
environment. In severe cold, engine coolant and fluid
in windshield washer can freeze. Batteries can freeze
and crack. Oil and grease may get thick and stiff.
Rubber may crack or break easily.
a. Install tire chains, if needed (para 2-39).
b. Use ether start unit when starting engine (para 2-11a).
c. Let engine warm up thoroughly.
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