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TM 9-2330-398-24
3-43. CHECK VALVE ASSEMBLY 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).
• Check valve assembly removed (para 2-132).
Materials/Parts:
• Semitrailer bonded and grounded (refer to
• Drycleaning solvent (Item 12, Appendix C)
TM 9-2330-398-10).
• Rag (Item 25, Appendix C)
• Preformed packing (Item 142, Appendix F)
a. DISASSEMBLY
1. Remove retaining ring (1), cap (2), and O-ring (3) from check valve (7).
2. Remove two plugs (6), lever bushing (1 1), pin (12), disc (4), and preformed packing (5) from check valve (7).
Discard preformed packing.
3. Remove lever (8), washer (9), and retaining ring (10) from disc (4).
b. CLEANING AND INSPECTION
WARNING
Drycleaning solvent P-D-80 is toxic and flammable. Always wear protective
goggles and gloves, and use In a wail-ventilated area. Avoid contact with skin,
eyes, and clothes, and do not breathe vapors. Do not use near open flame or
excessive heat.
1. Clean all metal parts with drycleaning solvent and rags.
2. Wipe O-ring clean with rags.
3. Inspect metal parts for cracks, scoring, and pitting. Replace any damaged parts.
4. Inspect O-ring and retainer for damage. If they are damaged, check valve assembly must be replaced.
c. ASSEMBLY
1. Install lever (8), washer (9), and retaining ring (10) on disc (4). /
2. Install two plugs (6), lever bushing (1 1), pin (12), disc (4), and new preformed packing (5) on check valve (7).
3. Install retaining ring (1), cap (2), and O-ring (3) on check valve (7).
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