Pulley, Crankshaft, Front. PART NO: A-R50414. Crankshafts John Deere FORAGE HARVESTER: 5200 (SN 335846>) John Deere FORAGE HARVESTER: 5400 (SN 335846>) John Deere FORAGE HARVESTER: 5440 John Deere TRACTOR: 4630 John Deere TRACTOR: 7020 (SN 335846>). . MODELS: John Deere FORAGE HARVESTER: 5200 (SN 335846>) John Deere FORAGE HARVESTER: 5400 (SN 335846>) John Deere FORAGE HARVESTER: 5440 John Deere TRACTOR: 4630 John Deere TRACTOR: 7020 (SN 335846>).