Im guessing a John Deere? My book shows a 1976 till 1982 make, with the 4wd starting in 1979. Apx Value 8,000 to 14,000. This would be a 179 Cubic Inch 3Cyl (JD) with apx 50 H.P. Weighing in about 5,500# dry weight. Serial # Breaks as follows: '79 305307, '80 350000, '81 392292, '82 418608 (found on the right side of frame).
I don't know if the FWD is Hyd drive or mechanical, would assume hyd as the larger tractors started the mechanical in the 50 series. there were several issues with the hyd drives but did work for the most part.
That's all I can realy tell you about the tractor as i've never even seen a 2240. Sounds like it should be a handy little loader or utility tractor.
Good Luck