WA312-2910-740 is a gear set for 20/30/31 Series power take off units, built with a 1″ keyed bore to drive a hydraulic pump. This gear set transfers rotational power from the PTO to the pump for hydraulic-driven equipment on the truck chassis.FeaturesPart number WA312-2910-740Fits 20/30/31 Series power take off units1″ KE (keyed) boreDrives hydraulic pump from PTO outputTech SpecsBore: 1″ KE (keyed)Application: 20/30/31 Series PTO