Goulds 4AI1K5G0 Pump Parts Breakdown, Exploded View Diagram & 3656 S Group All Iron Centrifugal Close Coupled Pumps Repair Parts PDF Manual. Replacement Casing, Impeller, Motor Adapter, Wear Ring, Impeller Bolt, Impeller Washer, Impeller Key, Casing O-Ring, Seal Assembly, Shaft Sleeve, Pipe Plug, & Screws Available.