TM 5-4310-335-14
CHAPTER 2
OPERATING INSTRUCTIONS
Section I. OPERATING PROCEDURES
WARNING
If equipment fails to operate, refer to troubleshooting procedures in Chapter 3.
2-1. General
The location and purpose of the controls and instruments used during operation of the pneumatic system are
included in this section.
2-2. Controls
See Figures 2-1 and 2-2.
a. ON-OFF Toggle Switch (11, fig. 2-1).
(1) Location. The on-off toggle switch is located on the flywheel housing above the engine air
cleaner.
(2) Purpose. The on-off toggle switch is used to short the electrical system to ground, stopping the
engine.
b. Fuel Shutoff Valve (17, fig. 2-1).
(1) Location. The fuel shutoff valve is located on the fuel strainer housing on the left side of the
gasoline engine.
(2) Purpose. The fuel shutoff valve cuts off the fuel supply from the fuel tank to the engine.
c. Pressure Regulator (3, fig. 2-1).
(1) Location. The pressure regulator is mounted on the extreme left hand side of the instrument
panel.
(2) Purpose. The pressure regulator is used to control the flow of pressurized air to the container
being pressurized.
d. Servicing Valve (2, fig. 2-2).
(1) Location. The servicing valve is located on the discharge hose assembly.
(2) Purpose. The servicing valve is used to shut off the delivery air when the container being
serviced has reached pressurized capacity.
e. Manual Drain Valve (7, fig. 2-1).
(1) Location. The manual drain valve is mounted on the instrument panel below the high pressure
discharge gage.
(2) Purpose. The manual drain valve is used to drain the pneumatic system.
(1) Location. The reservoir by-pass valve is mounted on the instrument panel below the reservoir
pressure gage.
(2) Purpose. The reservoir by-pass valve is used to divert pressurized air to the sphere (reservoir)
and isolate the sphere from the pneumatic system.
(1) Location. The starter pulley is located on the front of the gasoline engine, facing the sphere.
(2) Purpose. The starter pulley is rotated with the starter rope and is used to start the gasoline
engine.
2-3. Instruments (Figure 2-1)
a. Reservoir Pressure Gage (8).
(1) Location. The reservoir pressure gage is mounted on the instrument panel above the reservoir
by-pass valve.
(2) Purpose. The receiver pressure gage indicates the accumulated pressure in the sphere and
sphere to regulator line.
b. High Discharge Pressure Gage (6).
(1) Location. The high discharge pressure gage is mounted on the instrument panel to the left of the
receiver pressure gage.
(2) Purpose. The high pressure discharge gage indicates the pressure of the compressed air being
supplied to the unit being serviced.
c. Low Discharge Pressure Gage (4).
(1) Location. The low discharge pressure gage is mounted on the instrument panel between the high
discharge pressure gage and the regulator.
(2) Purpose. The low discharge pressure
2-1
