TM 54310-369-14
Section IV, OPERATION UNDER UNUSUAL CONDITIONS
Operation in Extreme Cold (Below 0F [-18C] )
Operation in Dusty or Sandy Areas
a. Lubricate the air compressor in accordance
with LO 5-2305-256-12, making sure that all lu-
ever possible. If the unit is operated outdoors, protect it
brication points are free from dirt and sand be-
from prevailing winds and cover it with a tarpaulin when
fore applying lubricant. Keep all lubricant con-
not in use.
tainers clean and tightly closed. Do not lubri-
cate excessively as dirt and sand will adhere
b. The interstage relief (safety) valve is fitted with a
to excess lubricant and may work into moving
manual override feature to assist in starting the unit in
parts. Wipe off all lubrication points after
extreme cold. To operate the override, refer to figure 4-7
lubricating.
b. Protect the air compressor from dust with screens,
item 30, and follow procedures listed below.
shelters, built from tarpaulin, or other dustproof material.
(1) Grasp pull ring and pull until ring is clear of
Keep the unit covered when not in use.
slotted collar.
c. It is necessary to clean all air cleaners more often in
(2) Hold collar and twist pull ring 90 so ring rests
dusty and sandy areas.
on top of collar, perpendicular to slot.
d. Take adequate precautions to prevent sand and dirt
(3) After engine has warmed-up, close relief valve
from entering the fuel tank. Service the fuel strainer as
by pulling ring and turning 90, resetting ring into slot in
often as necessary to keep the bowl free from dirt or sand.
collar.
Clean the engine air cleaner more often than normal.
c. Lubricate the air compressor in accordance with
d. Avoid excessive handling, kinking, and sharp bending
Operation Under Rainy or Humid Conditions
of the air hose, which will become brittle at low temper-
a. Protect the unit with a shelter, keeping the sides open
ature.
for ventilation.
e. Keep all fuel tanks and storage containers filled with
b. Make sure all surfaces requiring lubrication are clean
fuel to prevent formation of ice crystals from the freezing
and dry before applying lubricant. Lubricate the unit in
of condensate. Such crystals will clog fuel lines and
accordance with LO 5-2805-256-12.
carburetor jets. Use filter paper, chamois, or other type
c. Coat exposed polished or machined metal surfaces
strainer when filling the fuel tank or transferring fuel from
with a suitable rustproof material after first removing any
one container to another.
accumulations of rust.
d. Depress handle on airhose inflator assembly until air
receiver gage reads 30 psi or less.
Always provide a metallic contact between the
e. Open the draincock frequently to blow condensate
fuel container and the fuel tank. This will pre-
from the air receiver tank making sure air receiver tank gage
vent a spark from being generated as the gaso-
reads not more than 30 psi each time.
line flows over metallic surfaces.
f. Service all air cleaners more frequently.
f. Allow engine to reach normal operating temperature
before applying load.
Operation in Salt Water Areas
g. For additional information on operation in extreme
a. Wipe the unit dry at frequent intervals, with particular
cold conditions, refer to FM 9-207.
emphasis on the engine.
b. If the unit becomes encrusted with salt, wash it with
Operation in Extreme Heat
fresh water, taking care not to damage the electrical system
a. Lubricate the air compressor in accordance with
or air intake filters with water.
C.
Make sure all surfaces requiring lubrica-
b. Check the drive-belt tension frequently. Improper
tion are clean and dry before applying lubri-
drive-belt tension often results in overheating.
cant. Lubricate the unit in accordance with
LO 5-2805-256-12.
c. Locate the air compressor in an operating area that is
d. Coat exposed polished or machined metal surfaces
well ventilated or provide intake and exhaust fans to venti-
with a suitable rustproof material after first removing any
late in closed areas.
accumulation of rust.
d. Fill the fuel tank at the end of each day's operation,
especially in areas where the temperature drops sharply at
night. This will prevent condensation from forming in the
Operation at High Altitudes
The air compressor is designed to operate efficiently at
fuel tank.
e . Keep the engine clean.
elevations up to 5,000 feet. There will be a reduction in
f . Service all air cleaners as often as necessary.
efficiency because of the rarified air above this level.
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