TM 9-2330-384-14&P
4-41. RELAY QUICK RELEASE VALVE MAINTENANCE (Con't).
b. LEAKAGE TEST
WARNING
Wear safety goggles and face shield when performing leakage tests on relay
quick release valves (2). Failure to follow this warning may result in serious
eye injury due to high pressure air.
NOTE
If there are leaks found which cannot be corrected after performing steps 1
and 2, remove relay quick release valve (2) and replace damaged compo-
nents.
(1)
With air system fully pressurized, apply a soap solution to relay quick release valves (2) and
check for leaks. No leakage is allowed. If leaks are found, tighten fittings.
(2)
Release brakes and allow two seconds for air to exhaust from exhaust port on underside of
leakage is allowed.
c. REMOVAL
NOTE
Tag air lines, fittings, and valve ports as they are removed to ensure
l
proper installation.
If disconnecting air lines to remove air reservoir (3 or 4), perform steps
l
1, 2, and 4.
(1) Disconnect tractor EMERGENCY and SERVICE air couplings from semitrailer (see para-
(3 and 4).
(2)
Disconnect two air lines (8) from brake chambers (7).
(3)
Remove two air lines (8) from relay quick release valve (2).
NOTE
There are two SERVICE air lines (1) connected to tee (10) at relay quick
release valve (2) at front air reservoir (3).
(4)
Disconnect SERVICE air line (1) from elbow (5) at top of relay quick release valve (2).
(5)
Use channel lock pliers to remove relay quick release valve (2) from nipple (9) at air reservoir
(3 or 4).
(6)
If removing relay quick release valve (2) from front air reservoir (3), remove tee (10). If
removing relay quick release valve from rear air reservoir (4), remove elbow (5).
(7)
Inspect tee (10) and elbow (5) for cracks or damaged threads. If damaged, replace.
4-123
