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Craftsman 390.252158 Owner's Manual
Also see for 390.252158: Owner's manual
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MAINTENANCE4. Place back half of pump on flat surface and tap out ce-ramic seat. See Figure 6.I. Screw impeller on shaft (clockwise) while holdingshaft with 7/16" open end wrench on shaft flats. Thiswill automatically locate seal in place. See Figure 8.4790t94Figure 65. Clean seal cavity.6. Install new seal.A. Clean polished surface of ceramic seat with cleancloth.B. Wet outer edge of "O" Ring with detergent solution.C. With finger pressure press seat firmly and squarelyinto cavity. See Figure 7A. Polished face of seat facesinside of pump. If seat will not locate properly, placecardboard washer over polished face and use piece of3/4" standard pipe for pressing purposes. See Figure7B.Figure 7A Figure 7B483 0194D. Dispose of cardboard washer and clean surface ofseat.E. Clean motor shaft.F. Reassemble back half of pump to motor.G. Apply detergent solution to inside diameter of rotat-ing seal member.H. Slide rotating member on shaft tmtil rubber drive ringhits shaft shoulder. NOTICE: BE SURE you do not chipor scratch seal face on shaft shoulder or seal will leak!478 0194Figure 8J. Remount diffuser on seal plate.Cleaning Impeller1. Follow steps 1A through 1E under "Disassembly andAssembly of Pump _ on Page 8.2. Remove diffuser and impeller from pump per instruc-tions under "Removing Motor for Service and ReplacingShaft Seal" on Page 8.3. Clean impeller and reassemble impeller and diffuser perinstructions under "Removing Motor for Service andReplacing Shaft Seal" on Pages 8 and 9.Cleaning Shallow Well JetTo remove debris from venturi or nozzle, proceed as fol-lows:1. Disassemble pump per instructions on Page 8.2. Turn venturi counterclockwise and remove it. The noz-zle is now exposed. Remove it using a 5/8" hex socketwrench with extension. Turn counterclockwise. Ifsocket wrench is not available, insert an ice pick or sim-ilar pointed tool carefully into the nozzle. This will dis-lodge debris.3. Flush out the debris by running water through the noz-zle in the same direction as the dislodging tool was in-serted.4. Reinstall nozzle and venturi. Do not ove.rtighten_5. Reassemble pump per instructions on Pages 8 and 9.9 |
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