I purchased a Fastrak 6/2003. It was manufactured 3/2003. The hydros eventually failed and had to be fixed. The dealer said there was a kit to fix the problem, which he did. The mower has been running good ever since. The question I have is...do I need to replace a filter on these hydros IZT which were fixed with the kit? I know the new Fastraks have something different than when I purchased mine. I have about 102 hours on the machine. Thanks for your help.