This is a A-AT21780 Seal, Oil PN: AT21780Main Description As Following : A-AT21780 Seal, Oil P.N: AT21780 Outside Diameter: 1.628"Shaft Diameter: 1.125"Type: Dual LipWidth: .256" Found in Section & Models : Hydraulic System Parts > Hydraulic Pumps, John Deere TRACTOR: 2140 (W/ Front PTO), John Deere TRACTOR: 2155, John Deere TRACTOR: 2355, John Deere TRACTOR: 2355N, John Deere TRACTOR: 2555, John Deere TRACTOR: 2755, John Deere TRACTOR: 2855N, Transmission & Rear Axle > Clutch Related Parts, John Deere BACKHOE: 401B, John Deere INDUSTRIAL/CONSTRUCTION: 300, John Deere INDUSTRIAL/CONSTRUCTION: 301, John Deere INDUSTRIAL/CONSTRUCTION: 301A, John Deere INDUSTRIAL/CONSTRUCTION: 302, John Deere INDUSTRIAL/CONSTRUCTION: 400, John Deere INDUSTRIAL/CONSTRUCTION: 401, John Deere INDUSTRIAL/CONSTRUCTION: 401D, John Deere TRACTOR: 1020 (W/ Continuous Driven PTO), John Deere TRACTOR: 1030 (W/O Hi-Lo Shift), John Deere TRACTOR: 1040 (W/ Mid PTO), John Deere TRACTOR: 1120 (W/O Hi-Lo Shift), John Deere TRACTOR: 1130 (W/O Hi-Lo Shift) Associated Items : A-T22219, A-T30791 Also A-JD-S-TM1034, A-JD-O-OMT42367, 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-JD-O-OML29383, A-JD-O-OMR71859, A-FRM-JD, A-JD-P-PC1121, A-JD-S-TM1012, A-SMJD37, A-FRM-JD, A-SMJD37, A-JD-O-OMR71859, A-FRM-JD, A-JD-P-PC1289 And : Outside Diameter: 1.628" Shaft Diameter: 1.125" Type: Dual Lip Width: .256"