a. General. Vehicles operating in dusty or sandy areas require frequent
servicing of the air filter and cooling system.
inserted in the air intake shield assembly at the discretion of the unit
b. Before Operation.
(1) When operating on loose sand or soft ground, place transfer case shift lever
in H/L (high/lock range) position and transmission shift lever in D (overdrive).
to para. 2-40 for techniques that can
be used when operating
c. During Operation.
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 and transmission to D (overdrive).
(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, and allow engine to idle.
(b) Observe coolant temperature gauge for steady cooling.
Stop engine if coolant temperature gauge suddenly increases beyond
approximately 250F (120C) and/or overheat lamp illuminates.
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.
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, clean all sand from accelerator linkage and
(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.