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 TM 9-2330-385-14
4-48. DRAWBAR AIR BAG/SAFETY VALVE REPLACEMENT/ADJUSTMENT (CONT).
c.
Adjustment.
If airlines 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 drawbar
when it is raised. If drawbar
falls it will cause injury or
death to personnel.
(1)
Drain trailer air system, (Para 2-21).
(2)
Connect 0-160 psi (0-1103 kPa) pressure
gage to air hose 2224 (1) and adapter (2).
(3)
Charge trailer air system, (Para 2-22).
(4)
With aid of an assistant, raise air bag
control lever (3) to up position until 53-56
psi (365-386 kPa) or 95-100 psi (655-689
kPa) if equipped with drawbar extension, is
observed on 0-160 psi (0-1103 kPa)
pressure gage.
NOTE
If safety valve releases at less
than 53-56 psi (365-386 kPa)
or 95-100 psi (655-689 kPa) if
equipped with drawbar
extension, perform Steps (5)
through (11).
If safety valve releases at
53-56 psi (365-386 kPa) or
95-100 psi (655-689 kPa) if
equipped with drawbar
extension, no adjustment is
needed. Proceed to
Follow-On Maintenance.
(5)
Drain trailer air system, (Para 2-21).
4-482
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