RELAY VALVE MAINTENANCE (MODEL WPES-1).
This task consists of:
General Mechanics Tool Kit (Appendix B, Section III, Item 4)
Snap Ring Pliers (Appendix B, Section III, Item 3).
Rags, wiping (Appendix C, Section II, Item 23)
O-ring - 238327
Airbrake relay valve removed (para. 2-96).
Remove screw (18), diaphragm washer (19), and exhaust diaphragm (20).
Exhaust cover is installed under spring tension. Failure to release
pressure slowly can cause loss of parts. Keep pressure on
exhaust cover during removal.
Remove three cap screws (17), spacers (16), and exhaust cover (15).
Remove O-ring (14) and o-ring (21) from exhaust cover (15).
Remove emergency spring (13), piston and valve assembly (5), and O-ring (4).
Remove retaining ring (12) and inlet and exhaust valve assembly (24) from emergency piston (6).
Remove valve guide (11), o-ring (10), valve spring (9), and valve retainer (8) from inlet and exhaust valve
Remove o-ring (10) from valve guide (11).
Remove compression spring (22) and check valve ball (23).