have a filter I got off ebay when buying parts for my 280DTC. Its a ESL15900 but its same as a WIX 51715 . Supposed to fit a 535 but you can go on WIX web site and look up dimensions, thread size and diameter. O'Reilly auto has WIX filters here in Hendersonville, TN If that does fit your tractor maybe you can get it locally or if you want this one let me know. I don't know about the oil ,fuel or air filters. The 280DTC has a mitsubishi 4SL diesel engine in it. I have heard that some of the Farmtrac are same as Ford-New Holland.