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TM 9-2320-364-20-2
2-1797
(1) Start engine and build air pressure
to 125 4 psi (861 28 kPa)
(TM 9-2320-364-10).
(2) Turn OFF ENGINE switch.
(3) Check air lines 2663, 2653 and
2661 for crimps (see schematic
Fig 2-43).
(a) If there are crimps in air lines,
replace air lines (Para 12-36).
(b) If there are no crimps in air
lines, perform Steps (4)
and (5) below.
(4) Apply hand brake.
(5) Check fittings and air lines 2663,
2653 and 2661 for leaks.
(a) If there are leaks at fittings,
perform Step (10) below and
tighten/replace fittings
(Para 12-36).
(b) If there are leaks in air lines,
perform Step (10) below and
replace air lines (Para 12-36).
(c) If there are no leaks, air lines
and fittings are OK. Perform
Step (6) below.
(6) Check hand brake valve for leaks.
(a) If hand brake valve leaks,
perform Step (10) below and
replace hand brake valve
(Para 12-46).
(b) If there are no leaks, perform
Step (7) below.
(7) Check front double check valve
(middle) for leaks.
(a) If front double check valve
(middle) leaks, perform Step
(10) below and replace valve
(Para 12-11).
(b) If there are no leaks, perform
Step (8) below.
(8) Check tractor protection valve for
leaks.
(a) If tractor protection valve
leaks, perform Step (10)
below and replace valve (Para
12-45).
(b) If there are no leaks, perform
Step (9) below.
(9) Check service gladhand for leaks.
(a) If service gladhand leaks,
perform Step (10) below and
replace service gladhand
(Para 12-43).
(b) If there are no leaks, perform
Step (10) below.
(10) Release hand brake.
Wear safety goggles when performing
leakage tests on valves. Failure to do so
may result in serious eye injury due to
high presssure air.
VISUAL/AUDIBLE INSPECTION
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