DRAWBAR WILL NOT RAISE OR REMAIN RAISED. (Cont) -725550519

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.

Remain clear of draw bar when it is raised. If draw bar falls it will cause injury or death to personnel.

NOTE

Air lines and valves listed in this

troubleshooting procedure are illustrated and

located in FO-2.

VISUAL INSPECTION

(1) Start engine (TM 9-2320-364-10).

(2) Push in trailer charge valve in truck

(Para 2-22).

(3) Raise air bag control lever up.

(4) Listen for leaks on following air lines

and components: air lines 2228,

2226, 2224, fittings, air bag control

valve, inversion valve, safety valve

and air bag.

(a) If fittings leak and are loose,

tighten fittings.

(b) If air hose(s) leak, repair or

replace air hose(s) (see schematic

Fig FO-2 or Para 4-45).

leak, replace them according to

maintenance procedures

(Chapter 4).

(d) If all of the Items above are OK,

perform Steps (5) through (7)

below and go to Step 3 of

this Fault.

(5) Lower air bag control lever to center

position.

(6) Pull out trailer charge valve in truck.

(7) Turn OFF ENGINE switch.

PRESSURE TEST

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

(2) Disconnect hose 2229 from air

reservoir 1.

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

to air hose 2229.

(4) Start engine (TM 9-2320-364-10).

(5) While assistant pushes in trailer

charge valve in truck (Para 2-22),

observe pressure gage.

(a) If pressure does not raise to 125

5 psi (862 34 kPa), perform

Steps (6) through (9) below and

replace check valve (Para 4-45).

(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) Disconnect gage from hose 2229.

(9) Connect hose 2229 to air

reservoir 1.

4-229