TM 5-4310-335-14
gage indicates the delivery pressure below 600 psi (42.1800 kgs per sq cm).
d. Hourmeter (5).
(1) Location. The hourmeter is mounted on the instrument panel below and between the high and
the low discharge pressure gages.
(2) Purpose. The hourmeter through a shafting arrangement indicates the proportional hours of
operation for periodic maintenance and surveillance purposes.
Section II. OPERATION OF AUXILIARY EQUIPMENT
2-4. General
The dry chemical type fire extinguisher is suit- able for use on all types of fire and is effective in areas
where ambient temperature is 25 (-40 ) and above. If winterized the fire extinguisher may be used in
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temperatures below -25 . (-32 ).
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2-5. Operation
Remove the fire extinguisher from its location, lift the handle, press lever, and direct the powder at the base of
the flame using a side-to-side sweeping motion.
Section III. OPERATION UNDER USUAL CONDITIONS
2-6. General
This section contains instructions for operating the air compressor under usual conditions of climate and
service. Usual conditions are considered to be operation in warm weather (50 ) (10 ) or above.
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2-7. Starting Engine
a. Before-Operation Service. Before starting the engine, perform before-operating services as follow:
(1) Visual Inspection. Inspect the compressed air and oil lines for loose connections or leakage.
Tighten loose air connections. Inspect for loose bolts and nuts and tighten as necessary. Inspect to see that no
object obstructs moving parts to prevent damage.
replenish as required. Lubricate angle drive every 300 hours.
(3) Fuel. Check level of gasoline in fuel tank. Fill tank, as required.
(4) Intercoolers, Aftercoolers and Fan. Inspect cooling tubes for distortion, dents and loose
connections. Check the fan for dents, bends, looseness or other defects.
b. Starting the Engine.
(1) Set engine inlet temperature control (15, fig. 2-1). See legend on filter.
(2) Close the pressure regulator (3) and the manual drain valve (7). Open the reservoir by-pass
valve (9).
(3) Open the fuel shutoff valve (17, fig. 2-1) and position the on-off toggle switch (11) to ON.
(4) Move the engine choke lever (13) to CHOKE and the throttle (14) to GOVERN.
(5) Crank engine once with the starter rope to prime the fuel system.
(6) Open the choke to about halfway and repeat cranking. When engine starts, open the choke fully.
(7) Repeat the starting procedure if necessary.
2-8. Operation
a. General. The air compressor contains all fittings and charging hoses required for connecting the air
compressor to the unit being serviced.
WARNING
Exercise extreme care when working with high pressure air to prevent injury to
personnel or damage to equipment. Do not attempt to tighten any fitting or
perform any work on equipment during operation of the compressor or when the
system is under pressure. Do not tamper with any pressure relief valves.
b. Compressor, Operation. The gasoline engine is directly coupled to the air compressor, therefore,
starting the gasoline engine also starts air compressor.
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