metal parts. Keep a thin coat of oil on all ex-
2-21. Operation under Rainy or Humid Con-
posed machined parts, and keep as clean and
ditions
free of moisture as possible, Make sure all
Operation of the lubricating and servicing unit
unpainted spots are painted or coated with ap-
under rainy or humid conditions requires that
proved preventive compounds. When equip-
special attention be given exposed machined
ment has been exposed to salt water, steam
parts. A thin coat of oil should be applied to all
clean or wash exposed areas with clean, fresh
exposed machined parts to keep them as free
water as soon as poossible; dry thoroughly.
of moisture as possible. High moisture content
in the air may cause difficulty in the elec-
trical system. The spark plug, magneto and
The air pressure above sea level decreases as
wiring can become unserviceable due to high
humidity. Clean and dry affected parts at
altitude is increased. The result is a decrease
frequent intervals.
in air pressure to the carburetor causing a
too rich gasoline air mixture. If this condition
2-22. Operation in Salt Water Areas
interferes with the operation of the unit, ad-
In salt water areas, give special attention to
just the carburetor in accordance with instruc-
general maintenance of the lubricating and
tions provided in TM 5-2805-203-14.
servicing units, to prevent corrosion of these
Section V. OPERATION OF MATERIAL USED IN CONJUNCTION
WITH THE EQUIPMENT
c. Suction Gun. Use the suction gun for
2-24. Handguns
emptying or filling transmissions, differentials,
a. General. A set of handguns, adapters, and
or any part of a vehicle that requires empty-
couplers (figs. 2-6 and 2-6) are located in
ing, other than by drawing through a bottom
the accessory drawers below the hose reels.
outlet. Fill the suction gun by inserting the
These handguns are used to dispense small
nozzle into the oil or fluid. Pull out the handle
quantities of grease, lubricants other than
as far as it will go. When used for filling pur-
general purpose grease, and emptying and fill-
poses, the suction gun is operated by inserting
ing transmissions.
the nozzle into the oil hole. Push the handle
b. Hand Lever Gun. The high pressure hand
forward until a sufficient quantity of oil has
lever gun is used for lubricants required in
been delivered. When used for draining pur-
small quantities, or for dispensing special
poses, the suction gun is operated by inserting
lubricants. When operating the hand lever
the nozzle into the drain hole of the housing.
gun, best results are obtained by taking full
Run out the suction gun handle as far as it
strokes with the lever handle. If a heavy
till go, and a gun full of fluid will be re-
lubricant is used, it may be necessary to prime
moved. To empty, remove the nozzle from the
the lever gun occasionally. Special couplers
drain hole and push in the handle as far as it
will go.
and adapters provide contact for all types of
fittings. To fill the lever gun, proceed as fol-
d. Pistol Oiler. Operate the pistol oiler by
lows
squeezing the trigger. Use it for applying small
( 1 ) Unthread head and lever from
quantities of oil to friction points.
cylinder.
(2) Engage follower and push into a full
2-25. Oil Spray Gun, Air Operated
stop.
a. General. Use the air operated oil spray
(3) Place open end of the cylinder into
gun to obtain oil spray at high pressures. The
lubricant approximately 2 inches.
gun consists of an oil spray container and a
(4) If barrel is not completely full, pack
head with an air valve. Separate controls
tight by hand to eliminate air pockets.
and adjust both the input quantity of air and
(5) Replace head and lever assembly.
the quantity of air ejected. An adjustable
