The WA313-2920-230 is a 50/51 Series PTO hydraulic pump drive gear set with a 2″ B 13 bore configuration. This gear set is designed for power take off applications driving a hydraulic pump. Sold as a set to ensure proper gear mesh and consistent wear characteristics.Features50/51 Series gear set2″ B 13 bore configurationPTO hydraulic pump drive gearSold as a matched gear setTech SpecsSeries: 50/51Bore: 2″ B 13