I'm looking at buying a John Deere 3010. The price is really good and according to the seller everything works well and the are no leaks. The thing that concerns me the most is he told me that it was originally a tricycle front and the guy he bought it from put a 4 wheel drive hydraulic axle in the front. He said the guy never got around to hooking the hydraulics up to make the four wheel drive work but everything is there to make it work. Is this something common to add the wide 4WD front axle? How hard would it be to make the 4WD work? I know the 4WD works off hydraulics so there isn't different gear ratios to worry about, but should this be a major concern for me? Any advice would be great!