TM 9-2330-384-14&P
4-44. BRAKE INTERLOCK VALVES AND FITTINGS MAINTENANCE.
THIS TASK COVERS
a.
e.
Operating Test
Removal of Inversion Valve
b.
Leakage Test
f.
Installation of Inversion Valve
g.
c.
Removal of Brake Interlock Valve and
Removal of Relay Quick Release Valve
Angle Bracket
h.
Installation of Relay Quick Release Valve
d.
installation of Brake Interlock Valve and
i.
Removal of Shuttle Valve
Angle Bracket
Installation of Shuttle Valve
j.
INITIAL SETUP
Equipment Conditions:
Materials/Parts:
Ref Conditions
Three locknuts
Detergent
(Item 9, Appendix E)
Tag marker
(Item 21, Appendix E)
Tools:
Antiseize tape
(Item 22, Appendix E)
Tool kit, general mechanic's
General Safety Instructions:
Face shield
Wear safety goggles and face shield when
Safety goggles
performing leakage tests on brake inter-
Personnel Required: Two
lock valves.
Ensure that air lines do not rub against
References:
each other or any other surface when in-
stalled.
TM 9-2320-273-10 or
TM 9-2320-283-10
a. OPERATING TEST
(1)
If disconnected, connect tractor EMERGENCY and SERVICE air couplings to semitrailer (see
TM 9-2320-283-10).
(2)
Push in on paddle (12) of brake interlock valve (4) at front port (13). Listen for sound of air
exhausting through exhaust port on underside relay quick release valve (1).
(3)
Repeat step 2 to check operation of brake interlock valve (4) at rear inlet (10).
b. LEAKAGE TEST
WARNING
Wear safety goggles and face shield when performing leakage tests on
brake interlock valves. Failure to follow this warning may result in serious
eye injury due to high pressure air.
(1)
With semitrailer still coupled to tractor and with air system fully pressurized, apply a soap
solution to all brake interlock lines, fittings, and valves. There should be no leakage.
(2)
Push in on paddle (12) of brake interlock valve (4) at front port (13). Observe exhaust port on
two seconds. After two seconds, there should be no leakage.
(3)
Repeat step 2 to check for leakage while operating brake interlock valve (4) at rear inlet (10).
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