I have a 2004 MTL25 that the parking brake wont release on one side until the machine warms up. The other side releases as soon as you put the lap bar down as designed. You can about bet that as soon as the temp gage moves so too will the machine. Until it releases you can only go in circles, once it releases all works as it should with no apparent drag or tracking issue. Any thoughts or suggestions? pilot controls, all fluids and filters changed.