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Page Title: SERVICE BRAKES ON ALL AXLES DO NOT APPLY OR APPLY SLOWLY. (Cont)
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TM 9-2330-385-14
NOTE
Trailer air system pressure must be 125
S
5 psi (862 34 kPa) to begin
troubleshooting the brake system. If the
air system pressure cannot be maintained,
refer to Air System Troubleshooting.
Air lines and valves listed in this
S
troubleshooting procedure are illustrated
and located in FO-2.
VISUAL INSPECTION
(1) Inspect air lines 2255, 2660, 2260,
2639, 2638 and 2637 for crimps.
(2) Start engine (TM 9-2320-364-10).
(3) Push in trailer charge valve in
(4) While assistant fully applies brake
pedal, listen to air lines, fittings, load
sensor valve and quick release valve
for leaks.
(a) If fittings leak and are loose,
tighten fittings.
(b) If hose(s) leaks, perform Steps (5)
and (6) below and repair or
replace hose(s) (see schematic
(c) If any of the items listed above
leak, perform Steps (5)
and (6) below and replace them
according to maintenance
procedures (Chapter 4).
(d) If all of items listed above are OK,
go to Step (2) of this Fault.
(5) Pull out trailer charge valve in truck.
(6) Turn OFF ENGINE switch.
4-273

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