Open needle valve (1) approximately one- quarter
Operation of the lubricating and servicing unit under
rainy or humid conditions requires that special attention be
given exposed machined parts. A thin coat of oil should be
(5) During operation, inspect sight gage, (2, fig. 2-2)
applied to all exposed machined parts to keep them as free of
frequently and refill when necessary.
moisture as possible. High moisture content in the air may
in Extreme Heat.
cause difficulty in the electrical system. The spark plug,
magneto, and wiring can become unserviceable due to high
When operating in extremely high temperature, efficient
humidity. Clean and dry affected parts at frequent intervals.
cooling and adequate lubrication of the engine and air
compressor is vitally important. The cooling system must be
in Salt Water Areas.
checked frequently to make sure the air circulation is not
impaired. Give special attention to the engine shrouds and
In salt water areas, give special attention to general
fins for cleanliness. Inspect the carburetor air cleaner
maintenance of the lubricating and servicing units to prevent
frequently. Lubricate more frequently than specified in LO
corrosion of these metal parts. Keep a thin coat of oil on all
5-4930-218-12. Increase battery PMCS frequency and
exposed machined parts, and keep as clean and free of
refer to TM 92610-200-20.
moisture as possible. Make sure all unpainted spots are
painted or coated with approved preventive compounds.
or Sandy Areas.
When equipment has been exposed to saltwater, steam clean
Operation of the lubricating and servicing unit in sandy or
or wash exposed areas with clean, fresh water as soon as
dusty areas will require more frequent inspections and
possible; dry thoroughly.
lubrication of the unit. Fine sand can penetrate into bushings
in High Altitudes.
and bearings. Remove accumulations of sand and dirt at
frequent intervals. Inspect the engine and compressor shroud
The air pressure above sea level decreases as altitude is
and fins for clogging or impairment of air circulation. Check
increased. The result is a decrease in air pressure to the
the fuel system and take all necessary precautions to prevent
carburetor causing a too rich gasoline air mixture. If this
sand from entering the fuel tank. During shutdown periods,
condition interferes with the operation of the unit, adjust the
fasten all housing doors securely.
carburetor in accordance with instructions provided in TM
2-18. Operation under Rainy
or Humid Conditions.