TM 9-2330-294-14
BENCH TEST PROCEDURES FOR AIR SYSTEM AIR VALVES
E-1. General
E-2. Bench Tests
Bench Tests of air system air valves that have been
a. Emergency Relay Valve (MS53004-1) (Fig. E-
removed from the M747 semitrailer for disposal are
1)
to be performed by direct support personnel. It is
(1) Using suitable air lines and fittings, connect
expected that a percentage of these valves will prove
the relay emergency valve assembly to a testing
serviceable and will be returned to the supply
system. In addition to the operating and leakage
tests, valve port openings and threads should be
inspected for damage.
(2) Plug the two (2) delivery ports not being
emergency pressure of 70 psi. Delivery port pressure
used.
at both delivery ports shall be 0 psi.
(3) Adjust pressure regulator valve #1 for input
(6) Adjust pressure regulator valve #3 for an
pressure of 125 psi.
emergency pressure of 100 psi. Pressure at reservoir
(4) Open shutoff valve #3 (shutoff valve #2
port shall be equal to emergency port pressure.
closed) and adjust pressure regulator valve #3 for an
(7) Close vent valve #1. Open shutoff valve #2
emergency pressure of 45 psi. Pressure at reservoir
and adjust pressure regulator #2 for service pressure
port and delivery ports shall be equal to emergency
of 505 psi. Air pressure at service line shall be
pressure.
greater than delivery port pressure. Pressure dif-
(5) Adjust pressure regulator valve #3 for an