ELBOW VALVE REPAIR

Section IV. UNIT MAINTENANCE PROCEDURES - TM-10-4320-345-13_172

TM-10-4320-345-13 Tactical Water Distribution System Model TWDS20 NSN: 4320-01-361-9232 Manual
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TM 10-4320-345-13 4-14. ELBOW VALVE REPAIR. This task covers: a. Disassembly b. Cleaning c. Inspection d. Repair e. Assembly INITIAL SETUP : Tools: Material/Parts: General Mechanics Tool Kit (Item 1, App B) Detergent, General Purpose (Item 1, App E) Pipe Wrench (Item 2, App B) Wiping Rag (Item 2, App E) Vice (Item 2, App B) Coupling Gasket (2) (Item 1, App I) Equipment Condition : Packing (Item 9, App I) Elbow valve removed (para 3-4a) NOTE Ensure that all parts identified as mandatory replacement parts are discarded and replaced with new components. a. Disassembly. Refer to figure 4-1. (1) Remove nut (1), washer (2) and handwheel (3) from stem (9) (2) Unscrew packing nut (4) from from valve body (10) CAUTION Use care when removing packing to prevent scratching stem. Scratching stem will cause premature failure of elbow valve. (3) Remove packing gland (5) and packing (6) from stem (9) (4) Remove coupling gaskets (7 and 8) from valve body (10). b. Cleaning. (1) Wash all components with clean water and detergent (2) Rinse components in clean water and dry with wiping rag c. Inspection. (1) Inspect valve body (10) for cracks and corrosion. (2) Inspect sealing surface of stem (9) for scoring, scratches and nicks d. Repair. Replace damaged parts and all sealing components. If stem (9) or valve body (10) is damaged or defective, replace entire elbow valve 4-22

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