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TM 9-2330-398-24
3-44. R, P, M, AND G VALVE ASSEMBLIES REPAIR.
This Task Covers:
a. Disassembly
b. Cleaning and Inspection
c. Assembly
Initial Setup:
Tools/Test Equipment:
Equipment Conditions:
• General mechanic's tool kit (Item 4, Appendix B)
• Semitrailer uncoupled (refer to TM 9-2330-398-10).
• R, P, M, and/or G valve assembly removed
Materials/Parts:
(para 2-135).
• Drycleaning solvent (Item 12, Appendix C)
• Semitrailer bonded and grounded (refer to
• Rag (Item 25, Appendix C)
TM 9-2330-398-10).
• Parts kit (Item 4, Appendix F)
• Preformed packing (3) (Item 143, Appendix F)
• Top seal (Item 189, Appendix F)
NOTE
This task can be used for repair of the R, P, M, and G valve assemblies. The R
valve assembly is shown.
a. DISASSEMBLY
1. Remove cotter pin (2) top pin (3), handle (1), and clip (4) from valve stem (7). Discard cotter pin.
2. Remove two screws (19) and stop plate (5) from valve body (12).
3. Remove valve seal (8) split bearing (10), two preformed packings (9 and 1 1), and top seal (6) from valve body
(12). Discard valve seal, top seal, and preformed packings.
4. Remove spring pin (15) bottom stem (16), and preformed packing (17) from valve body (12). Discard spring pin
and preformed packing.
5. Remove and discard bearing (18) from bottom stem (16).
6. Remove disc (14) and sleeve (13) from valve body (12).
b. CLEANING AND INSPECTION
WARNING
Drycleaning solvent P-D-680 toxic and flammable. Always wear protective goggles
and gloves, and use in a well-ventilated area. Avoid contact with skin, eyes, and
clothes, and do not breathe vapors. Do not use near open flame or excessive hat.
1. Clean all metal parts with drycleaning solvent and rags.
2. Inspect metal parts for cracks, scoring, and pitting. Replace any damaged parts.
3-128
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