4-16. H-5 RELAY AIR VALVE
This task covers:
Tool kit SC4940-97-CL-E12
Drycleaning solvent (Item 34, Appendix B)
Pneumatic grease (Item 18, Appendix B)
Wiping rags (Item 32, Appendix B)
AB test rack
RA-47C pipe bracket
Diaphragm cock N-5523 (2)
Diaphragm cock 179-TA (3)
Diaphragm cock N-6911 (6)
Cutout cock N-2593
Single-pointer air gage N-1796 (4)
H-5 relay air valve removed
Valve assemblies are under a spring load. Use caution during disassembly procedures so that no
parts fly out, causing injury to personnel.
· The H-5 relay air valve provides for automatic brake release on the locomotive, independent of
the train brakes.
· When removing or repairing brake valves or components, check air lines and pipes for
corrosion, brakes, splits, or loose connections. Repair of air lines and piping consists of
replacing defective pipes, lines, and connections. Refer to TM 55-2210-224-24P for
identification of piping.
Remove three strainers (1) from body (22).
Remove two nuts (2) and remove cover (3), gasket (4), spring (5), check valve body (6), and gasket (7).