NO. 8 VENT VALVE
This task covers:
Tool kit SC 4940-97-CL-E12
Drycleaning solvent (Item 30, Appendix B)
Pneumatic grease (Item 16, Appendix B)
Triple valve oil (Item 23, Appendix B)
Lapping compound 1000-grit (Item 7, Appendix B)
No. 8 vent valve removed
Valve assemblies are under a spring load. Use caution during disassembly procedures so that no parts fly
out, causing injury to personnel.
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 gasket (2) and strainer (3) from body (1).
Remove pop rivet (4), seal (5), and vent protector body (6).
Remove four bolts (7) and diaphragm housing (8).
Remove piston diaphragm assembly (9).
Disassemble piston diaphragm assembly (9) by the following:
Remove locknut (10), follower (11), diaphragm (12), piston (13), and flat washer (14) from piston stem (15).
Remove felt (16) and seal (17) from piston (13).
Remove exhaust valve assembly (18).