This is a A-R59915 Pulley, Crankshaft PN: R59915Main Description As Following : A-R59915 Pulley, Crankshaft P.N: R59915 Dim A (1): 1.500" I.D.Dim B (2): 2.750" Center To Center On HolesKeyway: .25"Replaces: T24441, T25366 Crossed From: T24441 JOHN DEERE , T25366 JOHN DEERE Found in Section & Models : Engine Parts > Crankshafts, John Deere INDUSTRIAL/CONSTRUCTION: 301, John Deere TRACTOR: 1020, John Deere TRACTOR: 1530, John Deere TRACTOR: 820(3 Cyl.), John Deere TRACTOR: 830(3 Cyl.) Associated Items : New Also A-JD-S-TM1034, A-FRM-JD, A-JD-O-OMR48388, A-JD-O-OMT26335, A-JD-S-SM2071, A-SMJD37, A-FRM-JD, A-SMJD37, A-FRM-JD, A-JD-S-TM4212, A-SMJD201, A-FRM-JD, A-JD-O-OML29383, A-SMJD201 And : Dim A (1): 1.500" I.D. Dim B (2): 2.750" Center To Center On Holes Keyway: .25" Replaces: T24441, T25366