AMT 577A-010-90 Impeller - Hi Chromium

The AMT 577A-010-90 is an Impeller Kit, Hi Chromium for an AMT Submersible Contractor Pump. IMPELLER INSPECTION /REPLACEMENT If pump develops poor performance characteristics, impeller may be worn or clogged. IMPELLER INSPECTION Refer to Figure 2 1. Place unit on workbench in upright position and clean rust and buildup from around pump-to-motor flange. 2. Remove four short fasteners , which attach base to unit. 3. Lift motor assembly up out of pump assembly and lay on workbench in horizontal position. Rap down on pump body with soft mallet, if necessary, to separate parts. 4. Inspect impeller . If clog is found, remove debris and reassemble in reverse order. If damage to impeller is found, such as pitting, deep grooves, or breakage, proceed to next section. IMPELLER REPLACEMENT 1. Remove impeller fastener by unscrewing in counterclockwise direction. NOTE: To prevent motor shaft from turning, wedge a screwdriver between impeller vane and impeller fastener . 2. Slide off impeller washer . Impeller is keyed to motor shaft and can now be pulled free. 3. Install replacement impeller and reassemble in reverse order.