I HAVE A 642B BOBCAT THAT CREEPS FORWARD. I'VE BEEN TOLD IT NEEDS ADJUSTING OR THAT THERE IS AN ADJUSTMENT FOR THIS PROBLEM. DOES ANYONE OUT THERE KNOW HOW TO MAKE THIS "ADJUSTMENT" ? LOCAL DEALER IMPLIES IT IS SOMETHING THEY WOULD HAVE TO DO. HOPEFULLY, I CAN DO IT MYSELF. THANKS IN ADVANCE.