TM 5-4310-369-14
Preparation for Movement
Installation
a. Operate the compressor and allow the pressure in the
a. General. The portable air compressor which requires
air receiver tank to build up approximately 100 psi (7.03
no base is delivered with an air hose assembly and gage
kg/sq cm).
inflator. The air hose assembly is installed directly in the
b. Stop the engine. Open the draincock and blow the
end of the air receiver tank.
condensate from air tank. Close the draincock.
b. Outdoor Installation. Avoid muddy, sandy or dusty
c. Drain Fuel Strainer.
locations as a site for operation as dirt and moisture shorten
(1) Loosen the nut at the base of the fuel strainer
the life of all moving parts.
bowl retaining bail assembly (1).
c. Indoor Installation. If the compressor is to be
(2) Swing the bail to one side and carefully lower
operated within a building or vehicle, pipe the engine
the bowl (2) together with gasket (3) and strainer (4).
exhaust to the outside. Use as few bends as possible in the
Empty the bowl and discard gasket.
exhaust line and make sure all connections are tight. Main-
(3) Position strainer in recess of cover then place
tain a minimum distance of 12 inches from walls, etc.
new gasket in falter head (5) and install bowl over strainer.
d. Noise Hazard and Warning Signs. Signs conforming
(4) Swing cup and bail assembly beneath bowl and
to provisions of AR 385-30 will be erected in the area to
secure with nut at base.
provide notification of noise hazard in accordance with
d. Drain fuel tank into a suitable container (1).
TB MED-251. The signs should read:
e. Remove the air hose assembly (2) from the air re-
ceiver tank. Cover the hose connector in the air receiver
tank.
NOISE HAZARD EQUIPMENT
f. Lift the air compressor and accessories on a suitable
HEARING PROTECTION
carrier and block and tie it down.
REQUIRED
g. Move the air compressor to a new worksite.
Section III. OPERATIONAL CHECKS
NOTE
Operation
The amount of air in CFM and the pressure in
PSI necessary to operate pneumatic equipment
tion instructions.
can be determined by checking equipment data
b. Engine Operational Check. The engine governor must
plates or technical manuals. This air compressor
adjust the fuel input into the engine to control engine
should not be used to operate equipment that
RPM (speed) during light and heavy loads on the engine.
requires more than 5 CFM of air supply.
By alternately loading the engine (using air) and unload
unloading the engine (not using air) the operation of the
(2) The operation of the unloader valve can be
governor can be observed. If trouble exists, refer to
determined by starting the compressor and observing the
troubleshooting table 4-2.
air pressure gage. Upon starting, the air pressure gage should
c. Compressor Checks.
indicate 0 psi and the engine should be running at full throt-
(1) The air compressor is designed to deliver 5
tle (3600 rpm). When air pressure builds to 175 psi, the un-
cubic feet of air per minute (CFM) at a pressure of 175
loader valve will unload the compressor (let air escape).
pounds per square inch (PSI) (.142 cum at 12.3 kg/sq cm).
Further operation of the unloader valve can be deter-
This can be checked by loading the compressor (using air
mined by bleeding air from the tank (using air) and ob-
operated equipment) and checking for a pressure drop on
serving the air gage. As the air pressure drops to 140 psi
the air gage. If trouble exists, refer to troubleshooting
(9.8 kg/sq cm), the unloader valve will load the compressor
(stop air from escaping) and deliver air to the receiver. If
trouble exists, refer to troubleshooting table 4-2.
