TM 5-4930-218-14
flammable liquid fires.
NOTE
The portable lubricator need not be refilled with air
b. Operation. Remove fire extinguisher from its
each time grease is completely expelled. The air charge
location; break the seal, operate the control valve,
will last about a year.
and direct the stream at the base of the flame.
c. Maintenance. For maintenance of the fire ex-
a. Description. The portable carbon dioxide type
tinguisher, refer to TM 5-687.
fire extinguisher is suitable for electrical and
Section Ill. OPERATION UNDER UNUSUAL CONDITIONS
g. Batteries. The batteries installed in the
lubricating unit will give satisfactory service in ex-
a. General. You will have to take special
treme low temperatures if you take care of them and
precautions when operating the lubricating and ser-
keep them fully charged. If the lubricating unit is to
vicing unit in extremely cold temperatures.
remain idle for any long length of time during the
Lubrication, fuel, oil, electrical and compressed air
cold weather, disconnect the batteries and store them
systems, and care of lubricants are all affected by
in a warm place.
cold weather operation.
h. Cold Engine Starting. Before attempting to start
in subzero weather, make certain the consistency of
closed containers and, if possible, in a protected place
the crankcase oil is such that the engine can be start-
to insure ease of handling. You must remove all snow
ed. Check the controls to make sure they are free and
and ice from the containers before opening them to
in operating condition. When the engine starts, leave
transfer lubricants to lubricant tanks or to guns.
the choke partly open until the engine is warmed to
operating temperature, but be careful not to flood
that are too heavy will make your vehicle hard to
the carburetor.
start and difficult to operate. This will also cause
i. Values. Be extremely careful in operating all
rapid wear of the moving parts.
valves as they can be easily damaged in low tem-
d. Electrical System. The large surges of electrical
peratures.
current required to start a cold engine demand good
electrical contacts. Inspect, clean, and tighten all
diverters (1, fig. 2-5) duct gas either to a heat reser-
connections, especially battery terminals.
voir beneath the lubricant container or directly to at-
mosphere. Use as follows:
moisture in the air will cause water to accumulate on
(1) In cold weather, operate the engine exhaust
tools, in drums and containers. This water will freeze
diverters (1, fig. 2-5) to duct exhaust gas to the heat
and form ice crystals, which clog fuel lines and car-
reservoir.
buretor jets unless the following precautions are
(2) Start the engine (para 2-3) and close all doors
taken.
on the lubricating unit.
(1) Use filter paper or other approved strainer
(3) Allow the engine to run for about 10 minutes
when you fill the fuel tank or when you transfer fuel
with the air receiver drain valve (4, fig. 2-4) open.
from one container to another.
(4) Close the air receiver drain valve; wait until
(2) Remove snow or ice from the fuel tank filler
the compressor unloads before using the lubricant
cap and dispensing equipment before you fill the fuel
pump.
tank.
(5) Maintain control of lubricant temperature by
(3) Keep the filler cap tightened properly to keep
opening and closing the engine exhaust diverters as
moisture and dirt from the tank.
required.
(4) After filling or moving a fuel container, allow
k. Alcohol Dispenser. Use the alcohol dispenser
the fuel to settle before you fill the tank.
when temperature is below 32F (0C). The dispenser
(5) If possible, keep the fuel tank full when you
is used to inject alcohol into the air line leading to
operate the unit in extremely cold weather. This will
the pump to prevent condensate freezeup. The
prevent condensation of moisture inside the tank.
alcohol dispenser is equipped with an 8-ounce
capacity metal bowl and a needle valve which con-
f. Compressed Air System. Drain accumulated
trols the flow of alcohol. Operate as follows:
moisture from the compressed air reservoir as often
(1) Shut down the unit (para 2-9).
as necessary. The air reservoir is equipped with an
(2) Remove plug handle (3, fig. 2-2) and fill with
air receiver drain valve (4, fig. 2-4). When you open
alcohol. Reinstall handle.
the air receiver drain valve, the water which has
(3) Start engine (para 2-3).
collected at the bottom of the tank will be ejected.
