Front Hydraulic Pump Drive Hub Adapter Fits Ford Massey Tractor Fits:Ford- Jubilee Fits 1952 - 53 Fits with loaders # 701, 702, 703, 723, 724 & 725 w/ drive kits # 19-120, 19-122; NAA, 2120 4 cylinder 40004 cylinder Fits with loaders # 701, 702, 703, 723, 724 & 725 w/ drive kits # 19-120, 19-122; 620, 630, 640, 650, 660, 800, 820, 840, 850, 860 Fits with loaders # 701, 702, 703, 723, 724 & 725 w/ drive kits # 19-120, 19-122; 601, 611, 621, 631, 641, 651, 661, 671, 681, 801, 811, 821, 841, 851, 861, 871, 881 Fits with loaders # 701, 702, 703, 723, 724 & 725 w/ drive kits # 19-120, 19-122; 2000 4 cylinder, 2031, 2111, 2131, 4000 3 cylinder, 4031, 4120, 4121, 4130 3 Cylinder, 4131, 4140 Fits 1962 - 64 Fits with loaders # 701, 702, 703, 723, 724 & 725 w/ drive kits # 19-120, 19-122; Ford Industrial: 2030, 2130, 4030 4 cylinder, 4040, 4130 4 cylinder Fits 1962 - 64 Fits with loaders # 701, 702, 703, 723, 724 & 725 w/ drive kits # 19-120, 19-122- Massey- Ferguson: TE20, TO20, TO30 (All when using JJS4905 crankshaft pulley) - Specifications 1"" spline inside diameter 10 splines 2-3/4"" center to center across bolt holes 4"" overall diameter 7/16"" boltholes Some applications must use spacers/washers for crankshaft pulley bolt clearance Replacement Numbers:Replaces PNs:Ford- 290421, 500934- Massey- 290421, 500934- JJAgParts is an American owned and operated family business! Here at JJAgParts, we strive for customer satisfaction, if you are not satisfied with your order, please do not hesitate to contact us so we can help make it right. Note: OEM Part Numbers are for reference only and should be verified before purchase."