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Page Title:
TRAILER AIR SYSTEM WILL NOT CHARGE OR MAINTAIN A CHARGE. (Cont) |
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 TM 9-2330-385-14
If air lines are disconnected while under 90 to 125 psi (621-862 kPa), they can whip around and cause
personal injury. Air system should be drained before air lines are disconnected.
PRESSURE TEST
(1) Disconnect air hose 2620 from
multifunction valve.
(2) Connect air hose 2620 to 0-160 psi
(1103 kPa) pressure gage.
(3) Start engine (TM 9-2320-364-10).
(4) While assistant pushes in trailer
charge valve in truck (Para 2-22),
observe pressure gage.
(a) If 125 5 psi (862 34 kPa) are
not measured, perform Steps (5)
through (8) below and replace
parking brake valve (Para 4-46).
(b) If 125 5 psi (862 34 kPa) are
measured, parking brake valve
is OK.
(5) Pull out trailer charge valve in truck.
(6) Turn OFF ENGINE switch.
(7) Disconnect air hose 2620 from
pressure gage.
(8) Connect air hose 2620 to
multifunction valve.
PRESSURE TEST
(1) Disconnect air hose 2605 from air
reservoir 2.
(2) Connect air hose 2605 to 0-160 psi
(1103 kPa) pressure gage.
(3) Start engine (TM 9-2320-364-10).
(4) While assistant pushes in trailer
charge valve in truck (Para 2-22),
observe pressure gage.
(a) If 125 5 psi (862 34 kPa) are
not measured, perform Steps (5)
through (8) and replace
multifunction valve (Para 4-52).
(b) If 125 5 psi (862 34 kPa) are
measured, multifunction valve
is OK.
(5) Pull out trailer charge valve in truck.
(6) Turn OFF ENGINE switch.
(7) Disconnect air hose 2605 from
pressure gage.
(8) Connect air hose 2605 to air
reservoir 2.
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