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TM 9-2320-360-20-1
RELAY VALVE TEST
(1)
Release service brakes while assistant
observes the two front brake chambers.
(2)
Observe no 1 relay valve for air pressure
exhausting when brake is released.
Release service brakes while assistant checks
quick release valves for exhausted air.
Release
service
brakes
while
assistant observes the six brake
chambers on the three rear axles.
Change 1 2-721
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