TM 9-2320-280-10
Change 1
2-141
2-32. OPERATING IN DUSTY, SANDY AREAS
a. General. Vehicles operating in dusty or sandy areas require frequent
servicing of the air filter and cooling system.
NOTE
For dusty conditions, a precleaner, NSN 2940-01-302-8028, can be
inserted in the air intake shield assembly, at the discretion of the
unit commander.
b. Before Operation.
(1) Reduce tire inflation to 12 psi (83 kPa) front and 16 psi (110 kPa) rear to
increase traction when operating in sand.
(2) When operating in loose sand or soft ground, place transfer case shift
lever in “H/L” (high lock range) position and transmission shift lever in “D” (drive)
(or “
” (overdrive) for M1123 and A2 vehicles).
(3) Refer to paragraph 2-29 for techniques that can be used when operating
on unusual terrain.
c. During Operation.
NOTE
If additional power is needed to extract vehicle when mired in sand,
place transmission in “1” (first) and transfer case in “L” (low range).
After vehicle is extracted from mired condition, immediately return
transfer case to “H/L” (high lock range) position.
(1) Frequently check air restriction gauge. If indicator shows red, park
vehicle, stop engine, and refer to para. 3-15 for emergency air cleaner servicing.
(2) If engine overheating occurs:
(a) Park vehicle, allow engine to idle.
(b) Observe coolant temperature gauge for steady cooling.
CAUTION
Stop engine if coolant temperature gauge suddenly increases
beyond approximately 230°F (110°C). Failure to comply will result
in damage to engine.
(c) If coolant temperature continues to increase or does not lower, stop
engine. Perform applicable troubleshooting procedures in table 3-1.
(3) Accelerate slowly so wheels will not spin and dig into sand.
CAUTION
Use a wrecker or second vehicle equipped with winch to recover
vehicles mired in deep sand. Do not attempt to “rock” vehicles out of
deep sand with quick transmission shift changes. Damage to
transmission will occur.
d. After Operation.
(1) At end of daily operation, remove all sand from accelerator linkage and
brake components.
(2) Park vehicle in shade whenever possible to protect tires, soft tops, paint,
wood, and seals from sun, dust, and sand.
(3) If shade is not available, cover vehicle with tarpaulin. When entire
vehicle cannot be covered, protect windows and hood with tarpaulin to prevent
entry of sand or dust.
(4) Vehicles completing operation in dusty, sandy areas must be lubricated
and serviced by unit maintenance as soon as possible.
D
