AMT 3921-010-95 Impeller - Cast Iron

The AMT 3921-010-95 is an Impeller XCI Trash 1B50/L100/GX340 Subgrp/Kit for an AMT Aluminum Trash Pump. IMPELLER AND WEARPLATE REPLACEMENT Impeller and volute/wear plate are subject to wear only by abrasive sand or sediment laden liquids. If badly worn, all these parts can be replaced easily and the pump thus restored to full efficiency. NOTE: When the clearance between the impeller and the volute/wear plate exceeds 1/16" at the face of the impeller or 1/8" on the outside diameter of the impeller, it may be necessary to take corrective action. The increased clearance can cause lengthened priming times and reduced pumping capacity. If both the priming and capacity of your unit are satisfactory for your application, it is recommended that no corrective maintenance be performed regardless of what clearances on your unit may have developed, since the increased clearances in themselves are not generally harmful to your pump. Normally, new pump clearances can be restored by simply shimming behind the impeller. . If the impeller is badly worn it is recommended that the impeller be replaced. This is usually all that is required since only on unusually abrasive services does the cast iron wear plate show deterioration. Occasionally a stone or hard object might get caught in the impeller and cause damage to the volute/cutwater. In these cases, follow the instructions below for replacement and refer to Figure 2. 1. Disassemble pump for access as described in MECHANICAL SEAL REPLACEMENT, steps 1 and 2. 2. Replace parts as necessary. NOTE: When replacing volute, attach flapper valve assembly to new volute with fasteners . NOTE: Before installing new parts, clean all mating surfaces thoroughly.