OPERATION IN UNUSUAL WEATHER
TOXIC GAS, EXTREME DUST, OR DUST AND
SAND STORMS CONTINUED
When at halt, cover entire vehicle with
tarpaulin, if possible. If entire vehicle
cannot be covered, protect periscopes
against etching by windblown sand.
Also, protect engine compartment
against entry of sand and dust.
Clean tow winch and boom winch wire
ropes more often when operating in ex-
treme dust or sand. Wipe as much lubri-
cant from wire rope as possible.
Lubricants mixed with sand create an
abrasive paste that is more damaging to
wire rope than the lack of lubricant.
Disassemble and clean machine gun at
least once each day. Remove lubricants
on exposed and noncritical operating sur-
faces of machine gun and mount. This
will prevent windblown sand and dust
from sticking to oil and forming an
abrasive, After handling, wipe machine
gun with dry cloths to remove perspira-
tion which may cause rusting. During
sand or dust storms, keep machine gun
and mount covered, if possible. Clean
and lubricate machine gun and mount
with lubricating oil (PL special or CLP)
immediately upon leaving sandy terrain.
Operation in sand or dust requires daily
cleaning of air filter bags. Extreme condi-
tions may require cleaning filter bags
more than once a day. When air filter
baskets are removed, inspect air
separators for clogging. If clogged, notify
unit maintenance personnel.
Refer to page 3-56 for maintenance pro-
cedures which are required in addition to
normal PMCS when vehicle is operated
in extreme dust or sand.
Check level of battery acid in cells daily.
Electrolyte level must not drop below top
of battery plates. If low, notify unit
maintenance personnel. Batteries self-
discharge at a high rate when not in use.
If vehicle is parked for several days in
hot climate, have unit maintenance per-
sonnel remove batteries and store in a
cool place, if possible,
9 Extremely dusty conditions may clog
radiators and cause engine to overheat.
Remove engine deck and check condition
of radiators. If clogged, notify unit
EXTREMELY COLD WEATHER
Extreme cold will cause
lubricants to thicken, prevent
batteries from furnishing suf-
ficient Current for cold
weather starting, and prevent
fuel from vaporizing and pro-
perly combining with air to
form a combustible mixture
During extreme cold be very
careful when moving vehicle
after a shutdown. Thickened
lubricants may cause failure
of parts. Tracks may freeze
to the ground.
Cold weather practices and
precautions must be follow-
ed. FM 9-207 contains infor-
mation on cold weather oper-
ation applying specifically to
this vehicle. It must be con-
sidered an essential part of
this manual and not merely a
For descriptions of operations
in extreme cold weather,
refer to FM 9-207, FM
31-70, FM 31-71, and FM
Read FM 21-306 for special
instructions on driving
hazards in snow, ice, and
unusual terrain encountered
under extreme cold conditions.
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