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Page Title: CHECK VALVE ASSEMBLY REPAIR
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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). 3-126

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