4-13. 6-NFR DISTRIBUTING VALVE This task covers:
This task covers:
Tool kit SC4940-97-CL-E12
Dry-cleaning solvent (Item 34, Appendix B)
Plug gage 56204
Pneumatic grease (Item 18, Appendix B)
Emery cloth (Item 5, Appendix B)
Powder graphite (Item 12, Appendix B)
Lubricating oil (Item 24, Appendix B)
Flat gage 42044
Triple valve oil (Item 26, Appendix B)
AB test rack
Marking pigment (Item 30, Appendix B)
Lapping compound 1000 grit (Item 8, AppendixB)
6-NFR distributing valve removed
Valve assemblies are under a spring load. Use caution during disassembly
procedures so that no parts fly out, causing injury to personnel. NOTE
The 6-NFR distributing valve provides increased sensitivity of brake application and release, ensuring
reliability of operation in long, multiple-unit consists, and also acts as a safety valve to limit brake
cylinder pressure to required standards, regardless of brake pipe pressure employed.
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 55-2210-224-24P for identification of piping.
1. Remove three bolts (1), top cover (2), and gasket (3).