4-12. REPLACE/INSPECT IMPELLER, SHAFT SEAL, AND SHAFT ADAPTER

Figure 4-7. Replacing Impeller, Shaft Seal, and Shaft Adapter

TM-10-4320-309-14 Pump Unit Centrifugal Self-Priming 125 GPM Class 3 Diesel-Driven Army (NSN 4320-01-247-7127) Marine Corps (NSN 4320-01-313-9442) Manual
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TM 10-4320-309-14 TM 4320-14/1 4-12. REPLACE/INSPECT IMPELLER, SHAFT SEAL, AND SHAFT ADAPTER This task covers: a) Removal c) Installation b) Inspection INITIAL SETUP Tools Tool Kit, General Mechanics (Item 2, Appendix B, Section III) Wrench, Strap (Item 9, Appendix B, Section III) Mallet, Rubber (Item 17, Appendix B, Section III) Materials/Parts None Equipment Condition Para 3-16 Inlet air sound enclosure assembly removed. 3-16 Outlet air sound enclosure assembly removed. 4-11 Volute removed. 4-19 Recoil starter assembly removed. REMOVAL: a. Fit a strap wrench over the starter pulley cup. b. Use 9/16 inch socket to remove impeller locking bolt (1) and teflon washer (2). c. Unscrew impeller (3) in a counterclockwise direction using the strap wrench to hold the shaft from turn- ing. NOTE it maybe necessary to use a small wood block and the rubber mallet to tap the impeller vanes so impeller breaks loose. d. Remove shims (4 and 5). e. Remove and discard shaft seal (9) and seat (9A). f. Remove shaft adapter (12). INSPECTION: a. Inspect impeller for damage or wear. INSTALLATION: a. Ensure key (13) is installed in keyway of engine shaft. b. Position slot of shaft adapter (12) onto shaft key and push shaft adapter onto engine shaft. 4-20

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