STORAGE ASSEMBLY MAINTENANCE

Pressure Relief Valve Assembly Maintenance - cont

TM-10-4320-303-13 Tactical Water Distribution Equipment System (TDWS) Set 10-Mile Segement Model 06749-0813-81 110-00-0000 919 and 10 Manual
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TM 10-4320-303-13 4.12 STORAGE ASSEMBLY MAINTENANCE . 4.12.1 4 Inch Gate Valve Assembly Maintenance. This task covers: 4.12.1.1 Removal 4.12.1.4 Repair 4.12.1.2 Disassembly 4.12.1.5 Assembly 4.12.1.3 Inspection 4.12.1.6 Installation INITIAL SETUP Tools Equipment Conditions (Continued) Tool Kit, General Mechanic's, Quick-Disconnect Coupling Half removed, Automotive, Section III, Item 1, refer to paragraph 2.8.5.2. Appendix B Flange Adapter removed, refer to paragraph Material/Parts 2.8.5.2. Gasket (TM 10-4320-303-23P) General Safety Instructions Packing (TM 10-4320-303-23P) Do not work on equipment without following Equipment Conditions standard shop safety precautions. Pumping station shutdown, refer to applicable technical manual 4.12.1.1 Removal. Placing the 4 inch gate valve assembly (Figure 4-13, 1) in the equipment conditions specified above will remove the 4 inch gate valve assembly (1) from the storage assembly. 4.12.1.2 Disassembly. a. Remove nut (2) and handwheel (3). b. Remove packing nut (4). c. Remove packing gland (5), packing (6), and spring (7). Discard packing (6). d. Remove eight screws (8) and lock washers (9). Discard lock washers (9). e. Remove bonnet (10) and gasket (11) from valve body (12). Discard gasket (11). f. Unscrew valve stem (13) and remove from bonnet (10). g. Remove disc assembly (14) from valve stem (13). h. Remove two screws (15). i. Separate two discs (15 and 16) from pull nut (17). 4.12.1.3 Inspection. a. Inspect handwheel (3), bonnet (9), valve body (11), bonnet stem (12), disc stem (13), discs (14 and 15) and two seat rings (16) for corrosion, cracks, holes, bends or damage. b. Inspect nut (2), packing nut (4), packing gland (5), eight screws (7), and lock washers (8) for corrosion or damage. 4.12.1.4 Repair. Repair consists of replacing defective or damaged components. 4-35

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