There are only 3 filters on the tractor. The air filter probably is a two part filter, the oil filter that is probably the conister version and the hydraulic filter. The first two should be highly self explanatory but, the hydraulic filter is a big pain. Not sure when the hydraulic fluid was last changed but it only runs about $80 to fill it from TSC so it may be something you want to do especially if you dont know the history of the tractor. Once you have the fluid drained two large 15/16" plugs one under the transmission one under the seat, you would need to take off the pto shifter side plate. Then you will have access to the filter, although not great access. I took the lift cover off when I replaced it on my tractor but it was so terribly caked and clogged I couldn't believe the pump would do anything. It is a slip in cartridge style filter but there is a silver cap holding it in place. I had to use fence pliers to twist that metal cap off.