Machine description: 1981 JohnDeere 4640 tractorHours: 2,474 on meterSerial: 021254RWEngineJohn DeereCylinders: 6Fuel type: DieselTransmissionQuad-range16F - 6RDifferential lockOperators stationAC, HeatFeaturesPTO: 1000Th... more info about the 1981 John Deere 4640.