30-40.3040-01-520-9551.3048529r91.3267-4116.332f9030.332g7135.3450rpm. I believe that the shaft is 7/8 in diameter with 12 splines. The item Clean EATON Model 70412-3660 HYDRAULIC PISTON PUMP 7/8 12 Spline Shaft is in sale since Monday, November 5, 2018.