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EXCESSIVE BRAKING DISTANCE (CONT). -725550592
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TM-9-2330-385-14 Palletized Load System Trailer (PLST) Model M1076 Manual
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EXCESSIVE BRAKING DISTANCE (CONT). -725550594
TM 9-2330-385-14
If air lines are disconnected when they are under 125 5 psi (862 34 kPa), they can whip around and
cause personal injury. Care should be exercised when disconnecting an air hose that is thought to be
under pressure.
NOTE
When rod is disconnected from the valve it
should hang freely without interference from
other components. During testing of load
sensing valve, control rod must be able to
simulate a no load condition.
PRESSURE TEST
(1) Drain trailer air system (Para 2-21).
(2) Disconnect air hose 2660 from quick
release valve.
(3) Connect 0-160 psi (1103 kPa)
pressure gage to air hose 2660.
(4) Disconnect load sensing valve
control rod from axle (Para 4-53).
(5) Start engine (TM 9-2320-364-10).
(6) Push in trailer charge valve in
(7) While assistant fully applies brake
pedal, push up on control rod and
observe pressure gage.
(a)  If valve output pressure does
not go to 120 5 psi
(827 34 kPa), perform Steps (9)
through (14) below and replace
(b)  If valve output pressure does
go to 120 5 psi (827 34 kPa),
go to Step (8) below.
(8) While assistant fully applies brake
pedal, pull down on control rod and
observe pressure gage.
(a)  If valve output pressure is less
than 30 5 psi (207 34 kPa),
perform Steps (9) through (14)
below and replace valve
(b)  If valve output pressure does go
to 30 5 psi (207 34 kPa),
valve is OK.
(9) Release brake pedal.
(10) Pull out trailer charge valve in truck.
(11) Turn OFF ENGINE switch.
(12) Disconnect air hose 2660 from
pressure gage.
(13) Connect air hose 2660 to quick
release valve.
(14) Connect control rod to axle.
(15) Adjust load sensing valve

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