I have just purchased a tractor with a model number I can't decipher. According to the silver sticker under the hood, the model number is K5011K. It is very readable. The tractor appears to be yellow from the factory and has what appears to be a factory loader. It is 3 cylinder gas with the 6F4R transmission. It looks a lot to me like a 4000, except with the heavy front axle and such. What I would like to know is the usual stuff like year model, where I can get documentation, HP, etc. I am also interested in adding a 3pt hitch, PTO that it does not currently have, and ROPS if anyone has any information on this.