The SM series mud centrifugal pumps are similar with the SSA series pumps. All the spare parts are interchangeable, except the Frame Support and Shaft, 4 differences in length. The pump main spare parts are Pump Casing, Impeller, Bearing Block, Pump Axle, Bearing, Shaft Coupling, Wearing Plate, Seal Apparatus, OilS seal, Bolts , Nuts, Motor and Base.