Bell & Gossett 169228 Ball Bearing Motor 1/2HP, 115/230V, 1PH, 1725RPM Used On 172703 MF Series 60 603S Inline Pump 1/2HP 1750 115/208-230/1/60 172667 MF Series 60 606S Inline Pump 1/2HP 1750 115/208-230/1/60 172713 MF Series 60 608S Inline Pump 1/2HP 1750 115/208-230/1/60 172717 MF Series 60 610S Inline Pump 1/2HP 1750 115/208-230/1/60 172755 MF Series 60 621S Inline Pump 1/2HP 1750 115/208-230/1/60 172706 MF Series 60 B603S Inline Pump 1/2HP 1750 115/208-230/1/60 172711 MF Series 60 B606S Inline Pump 1/2HP 1750 115/208-230/1/60 172715 MF Series 60 B608S Inline Pump 1/2HP 1750 115/208-230/1/60 172719 MF Series 60 B610S Inline Pump 1/2HP 1750 115/208-230/1/60 172771 MF Series 60 B621S Inline Pump 1/2HP 115/230V 1PH The 169228 Is Maintenance Free Motor (Does Not Need To Be Oiled) Replaces Bell & Gossett: 903580 and 111044