DRAWBAR WILL NOT RAISE OR REMAIN RAISED. (Cont) -725550521

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.

VERIFY REPAIR

(1) Drain trailer air system (Para 2-21).

(2) Disconnect hose 2228 from air bag

control valve.

(3) Connect 0 to 160 psi (1103 kPa)

gage to air hose 2228.

(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 pressure does not raise to 125

5 psi (862 34 kPa), perform

Steps (6) through (10) below and

replace check valve (Para 4-41).

(b) If pressure does raise to 125

5 psi (862 34 kPa), check

valve is OK.

(6) Pull out trailer charge valve in truck.

(7) Turn OFF ENGINE switch.

(8) Drain air reservoir 1.

(9) Disconnect gage from hose 2228.

(10) Connect hose 2228 to air bag

control valve.