Specifications

TM 9-2330-384-14&P
4-44. BRAKE INTERLOCK VALVES AND FITTINGS MAINTENANCE.
THIS TASK COVERS
a.
Operating Test
e.
b.
Leakage Test f.
Removal of Inversion Valve
Installation of Inversion Valve
c. Removal of Brake Interlock Valve and
g.
Angle Bracket h.
Removal of Relay Quick Release Valve
d. installation of Brake Interlock Valve and
Installation of Relay Quick Release Valve
i.
Removal of Shuttle Valve
Angle Bracket
j.
Installation of Shuttle Valve
INITIAL SETUP
Equipment Conditions:
Ref Conditions
2-11 Wheels chocked.
Tools:
Tool kit, general mechanic’s
Face shield
Safety goggles
Personnel Required: Two
References:
TM 9-2320-273-10 or
TM 9-2320-283-10
Materials/Parts:
Three locknuts
Detergent
Tag marker
Antiseize tape
(Item 9, Appendix E)
(Item 21, Appendix E)
(Item 22, Appendix E)
General Safety Instructions:
Wear safety goggles and face shield when
performing leakage tests on brake inter-
lock valves.
Ensure that air lines do not rub against
each other or any other surface when in-
stalled.
a. OPERATING TEST
(1) If disconnected, connect tractor EMERGENCY and SERVICE air couplings to semitrailer (see
paragraph 2-12). Fully pressurize semitrailer air system (see TM 9-2320-273-10 or
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
underside of relay quick release valve (1). Air should exhaust for a period of approximately
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).
4-134