Goulds Pump 21BF1P2T0-T784 Parts Breakdown, Exploded View Diagram & M Group Bronze Fitted Centrifugal Pumps Repair Parts PDF Manual. Replacement Casing, Impeller, Motor Adapter, Wear Ring, Impeller Bolt, Impeller Washer, Square Key, O-Ring, Seal Assembly, Shaft Sleeve, Pipe Plug, Casing Screw, & Motor Screw Available Now.