H-5 RELAY AIR VALVE
This task covers:
Tool kit SC 4940-97-CL-E12
Drycleaning solvent (Item 30, Appendix B)
Pneumatic grease (Item 16, Appendix B)
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 an automatic brake release on the locomotive, independent of the
When removing or repairing brake valves or components, check air lines and pipes for corrosion, breaks,
splits, or loose connections. Repair of air lines and piping consists of replacing defective pipes, lines, and
connections. Refer to TM 55-2210-223-24P for identification of piping.
Remove gaskets (1) and (2) and three strainers (3).
Remove two nuts (4) and remove cover (5), gasket (6), spring (7), check valve body (8), and gasket (9).
Remove supply valve (10) from check valve body (8).
Remove four nuts (11) and bolts (12) and remove cover (13), diaphragm (14), and gasket (15).
Remove diaphragm follower unit assembly (16) from body (17).