organizational and intermediate maintenance instructions
for the air compressor unit.
OPERATIONAL CHECKOUT. Operational
checkout of the air compressor unit consists of operating
the unit and observing instrument panel meter and
gauge indications. Correct instrument panel meter and
gauge indications are listed in Table 5- 1. To perform
operational checkout, proceed as follows:
Make certain CLUTCH operating rod (11,
Figure 4-2) is in disengaged position, away from control
Make certain COMPRESSOR UNLOADER
switch (16) is in the UNLOAD position and close all
control panel valves.
Make certain ENGINE THROTTLE control
(10), is positioned half way in (idle position 1,100 ± 100
rpm [1,100 ± 100 r/min] ).
Turn MASTER SWITCH (9) to 45° cw
If engine oil pressure does not register
immediately shut down engine and
Troubleshooting (Section V).
Push engine START switch (8). When
engine starts continue to hold START switch until
ENGINE OIL PRES-
SURE gauge (6) registers pressure; then, release
After engine is running, allow engine to
warm up a minimum of 5 minutes at 1,100 ± 100 rpm
(1,100 ± 100 r/min).
After engine is warm, engage clutch by
pushing clutch handle toward panel with a hard fast
If compressor oil pressure does not
register within 5 seconds, shut down
engine, and determine cause. Refer to
TROUBLESHOOTING (Section V).
Pull engine THROTTLE CONTROL to the
full out position and lock by turning handle in clockwise
direction until snug. COMPRESSOR OIL PRESSURE
GAUGE (5) should register oil pressure within five
Make certain all control valves on control
panel are closed.
Place COMPRESSOR UNLOADER switch
to LOAD position. This function allows the compressor
to furnish breathable air to the receiver @ 3200 psi.
Observe high pressure gauge (4) indication.
With air compressor unit operating under normal
Table 5-1. Instrument Panel Meter and Gauge Indication
METER OR GAUGE
AIR SERVICE PRESSURE
3200 psi (22,048 kPa)
4TH STAGE PRESSURE @ MECHANICAL FILTER
3200 ± 25 psi (22,048 ± 170 kPa)
COMPRESSOR OIL PRESSURE
25 ± 5 psi (172 ± 35 kPa)
ENGINE OIL PRESSURE
60 ± 10 psi (413 ± (0.9 kPa)
2 + 38 AMPERES