9
Movable contact
1
L1 terminal screw
10
Heater
2
Mounting plate
11
Coil retainer spring
3
L3 termmal screw
12
T2 terminal screw
4
Knockout plug
13
Pressure switch
5
L2 terminal screw
14
Overload relay
6
Starter box
15
T1 terminal screw
7
T3 terminal screw
16
Heater
8
Stationary contact
Figure 9-Continued.
Section Il. CONTROLS AND INSTRUMENTS
17. General
This section describes, locates, illustrates, and
The oil level gage mounted in the compressor
furnishes the operator sufficient information
crankcase, is a direct-reading, glass-covered
gage used to check the level of the oil in the
pertaining to the various controls and instru-
ments provided for the proper operation of the
compressor crankcase.
air compressor.
The pressure gage (11, fig. 3), mounted in
The choke lever (2, fig. 10), mounted on the
the top of the air receiver tank, is a, needle-in-
engine, is a manually operated lever used to con-
dicating, direct-reading pressure-operated gage
trol the amount of air entering the carburetor.
graduated from 0 to 300 psi in increments of
25 psi. The gage indicates the air pressure in
19. Stop Button
the air receiver tank. Normal operating pres-
The stop button (1, fig. 10), mounted on the
sure is 140 to 175 psi.
magneto, is a rubber-covered, push-type but-
ton used to stop the engine.
The safety relief valve (8, fig. 4), is a preset
valve that is actuated when the air receiver tank
The globe valve (5, fig. 8), mounted on the
holds a pressure of 200 or more psi. The valve
end of the air receiver tank (7), is a manually
can be tripped manually by pulling up on the
operated valve that controls the flow of com-
ring in the top. It is manually tripped to re-
pressed air to the air hose (1) and inflator gage
lease pressure in the air receiver tank and to
(9).
test the valve.
21. Draincock
The draincock, mounted on the underside of
The reset button (14, fig. 3), mounted on the
the air receiver tank at the front end of the unit,
cover of the magnetic starter (13) is a manually
is a manually operated valve used to drain com-
operated button which, when pushed, resets the
pressed air and condensation from the air re-
thermal relay in the magnetic starter.
ceiver tank.
