TM 5-4930-244-14
4-52. QUICK RELEASE AND LIMITING VALVE - REPLACE.
This Task Covers:
a. Removal
b. Installation
Initial Setup:
Tools Required
Tool Kit, General Mechanic's: Automotive (Appendix B, Section Ill, Item 1)
Materials/Parts Required
Teflon Tape (Appendix E, Section II, Item 7).
Rags, Wiping (Appendix E, Section II, Item 1).
Equipment Condition
Unit shut down and cool
WARNING
·
Chock wheels when unit is not on a level surface Unit could roll and cause
injury.
·
Compressed air may cause severe injury or death, if not used properly.
Make sure that air pressure in trailer brake system is completely drained
before maintenance
a. Removal. (Refer to Figure 4-52).
(1)
Completely vent trailer air brake system pressure by opening drain valve. (para 4-51).
(2)
Disconnect two air brake lines (1) from quick release and limiting valve (2) fittings.
(3)
Remove two hex head-cap screws (3) and two locknuts (4) holding quick release and limiting valve (2) to trailer.
(4)
Unscrew quick release and limiting valve (2) from hex nipple (5) and synchronizing valve (6).
(5)
Remove hex head-plug (7), male adapter (8) and male elbow (9) from ports of quick release and limiting valve (2).
(6)
Clean and inspect quick release and limiting valve (2), hex head plug (7), male adapter (8), male elbow (9) and air
brake lines (1)
4-159
