|
| |
TM 9-2330-398-24
3-42. F, B, AND C VALVE ASSEMBLIES REPAIR,
This Task Covers:
a. Disassembly
b. Cleaning and Inspection
c. Assembly
Initial Setup:
Tools/ Test Equipment:
Equipment Condition:
• General mechanic's tool kit (Item 4, Appendix B)
• Semitrailer uncoupled (refer to TM 9-230-398-10).
• F, B, and/or C valve assembly removed (para 2-129).
Materials/Parts:
• Semitrailer bonded and grounded (refer to
• Drycleaning solvent (Item 12, Appendix C)
TM 9-2330-398-10).
• Rag (Item 25, Appendix C)
• Gasket (Item 72, Appendix F)
• Lockwasher (8) (Item 109, Appendix F)
• Packing (Item 126, Appendix F)
NOTE
Use this task to repair the F, B, or C valve assembly. The F valve assembly is
shown.
a. DISASSEMBLY
1. Remove eight screws (8), lockwashers (14), and nuts (15), gasket (12), and bonnet (7) from valve body (13).
Discard lockwashers and gasket.
2. Loosen packing nut (3) and turn handwheel (2) counterclockwise. Remove nut (1), handwheel (2), packing nut
(3), spring (4), packing retainer (5), and packing (6) from bonnet (7). Discard packing.
3. Remove stem (9), pull nut (10), and disc assembly (11) from valve body (13).
b. CLEANING AND INSPECTION
WARNING
Drycleaning solvent P-D680 is toxic and flammable. Always wear protective
goggles and gloves, and use In a well-ventilated air. Avoid contact with skin, eyes,
and do not breath.; vapors. Do not use near open flame or excessive heat
1. Clean all metal parts with drycleaning solvent and rags.
2. Inspect metal parts for cracks, scoring, and pitting. Replace any damaged parts.
3. If disc assembly or disc assembly mating surfaces are pitted or scored, replace entire valve assembly.
3-124
|
