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Page Title:
ONE OR BOTH FLATRACK LOCKING MECHANISM LATCHES WILL NOT UNLOCK OR REMAIN UNLOCKED. (Cont) |
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 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.
PRESSURE TEST
(1) Drain trailer air system (Para 2-21).
(2) Disconnect air hose 2080 from
flatrack locking valve.
(3) Connect air hose 2080 to 0 to 160
psi (1103 kPa) pressure gage.
(4) Start engine (TM 9-2320-364-10).
(5) While assistant pushes in trailer
charge valve in truck, observe
pressure gage (Para 2-22).
(a) If 65 to 70 psi (448-483 kPa) is
not measured, perform Steps (6)
through (10) below and replace
pressure hold back valve
(b) If 65 to 70 psi (448-483 kPa) is
measured, pressure hold back
valve is OK.
(6) Pull out trailer charge valve in truck.
(7) Turn OFF ENGINE switch.
(8) Drain trailer air system.
(9) Disconnect air hose 2080 from
pressure gage.
(10) Connect air hose 2080 to flatrack
locking valve.
PRESSURE TEST
(1) Disconnect air hose 2078 or 2081
from air chamber.
(2) Connect air hose 2078 or 2081
to 0 to 160 psi (1103 kPa)
pressure gage.
(3) Push in flatrack locking valve.
(4) While assistant pushes in trailer
charge valve in truck, observe
pressure gage.
(a) If 65 to 70 psi (448-483 kPa) is
not measured, perform Steps (5)
and (9) below and replace flatrack
locking valve (Para 4-54).
(b) If 65 to 70 psi (448-483 kPa) is
measured, flatrack locking valve
is OK.
(5) Pull out flatrack locking valve.
(6) Pull out trailer charge valve in
truck (Para 2-22).
(7) Turn OFF ENGINE switch.
(8) Disconnect air hose 2078 or 2081
from pressure gage.
(9) Connect air hose 2078 or 2081 to
air chamber.
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