Shaft, Load Control (Ref. 1) (SN < -250000). PART NO: A-R33826. Dim A (1)21.620" Long Dim B (2)1.124" Dia. . MODELS: John Deere INDUSTRIAL/CONSTRUCTION: 600 John Deere TRACTOR: 4000 (SN < -250000) John Deere TRACTOR: 4010 John Deere TRACTOR: 4020 (SN < -250000).