I have a 2060 skidsteer 1996 model 225 hrs. when you start the machine it will begin to move foward at a slow speed unless you lay your leg against the right control applying a slight back pressure. When you bring the engine to an idle the machine will start a left turn in reverse usually, sometimes it will make a left turn in a foward direction, as soon as you throttle up it will stop the turn and begin a straight foward creeping motion. It will do it wether the park brake is on or off. The original filters were just changed, they had not been changed at the 50 hrs interval as required.