b. Care of Lubricants. Keep lubricants in
equipped with an air tank drain valve (44,
tightly closed containers and, if possible, in a
protected place to insure ease of handling. Re-
rotated counterclockwise, the water which has
move all snow and ice from the containers
collected to the bottom of the tank will run
before opening them to transfer lubricants to
out.
lubricant tanks or to guns.
h. Batteries. The batteries installed in the
c. Special Equipment. The unit is equipped
lubricating unit will give satisfactory service
with an alcohol dispenser (6, fig. 2-3) for cold
in extreme low temperatures if care is taken
weather operation, and a heat exhaust diverter
to keep the batteries fully charged. If the
(22). The alcohol dispenser prevents freezing
lubricating unit is to remain idle, for any long
of condensate in air lines. The exhaust diverter
length of time, during the cold weather, dis-
uses heat from the exhaust to warm lubricant
connect the batteries and store them in a warm
containers.
place.
d. Lubrication. During the cold weather,
i. Cold Engine Starting. Before attempting
lubricants that are too heavy will make the
to start in subzero weather, make certain the
vehicle hard to start and difficult to operate.
consistency of the crackcase oil is such that
This will also cause rapid wear of the
the engine can be started. Check the controls
moving parts.
to make sure they are free and in operating
condition. When the engine starts, avoid letting
e. Electrial System. The large surges of
it stall by leaving the choke partly open, but be
electrical current required to start a cold
careful not to flood the carburetor.
engine demand good electrical contacts. In-
spect, clean, and tighten all connections,
j. Valves. Be extremely careful in operating
especially battery terminals.
all valves as they can be easily damaged in
low temperatures.
f. Fuel System. In cold weather, condensa-
tion of moisture in the air will cause water to
accumulate on tools, in drums and containers.
When operating in extreme high temperature,
This water will freeze and form ice crystals,
efficient cooling and adequate lubrication of
which clog fuel lines and carburetor jets unless
the engine and air compressor is vitally im-
the following precautions are taken.
portant. The cooling system must be checked
(1) Use filter paper or other approved
frequently to make sure the air circulation is
strainer when filling the fuel tank or when
not impaired. Give special attention to the en-
transferring fuel from one container to the
gine shrouds and fins for cleanliness. Inspect
other.
the carburetor air cleaner frequently. Lubri-
(2) Remove snow or ice from the fuel
cate more frequently than specified in LO 6-
tank filler cap and dispensing equipment before
4930-217-12.
filling the fuel tank.
(3) Keep the filler cap tightened properly
to keep moisture and dirt from the tank.
Operation of the lubricating and servicing
unit in sandy or dusty areas will require
(4) After filling or moving a fuel con-
more frequent inspections, and lubrication of
tainer, allow the fuel to settle before filling
the unit. Fine sand can penetrate into bushings
the tank.
and bearings. Remove accumulations of sand
(5) If possible, keep the fuel tank full
and dirt at frequent intervals. Inspect the
when operating in extreme cold weather. This
engine and compressor shroud and fins for
will prevent condensation of moisture inside
clogging or impairment of air circulation.
the tank.
Check the fuel system and take all necessary
precautions to prevent sand from entering the
g. Compressed Air System. Drain accumu-
fuel tank. During shutdown periods, fasten
lated moisture from the compressed air reser-
-
all housing doors securely.
as often as necessary. The air reservoir is
