Shaft, PTO (540 RPM). PART NO: A-AR41753. A & I shaft does not include A-JD7557 Bearing Race Dim A (1)10.687" long Dim B (2)6 spline. . MODELS: John Deere INDUSTRIAL/CONSTRUCTION: 500 John Deere INDUSTRIAL/CONSTRUCTION: 500A John Deere INDUSTRIAL/CONSTRUCTION: 600 John Deere TRACTOR: 2510 John Deere TRACTOR: 3020 (SN < -122999) John Deere TRACTOR: 4020 (SN < -200999).