Hi All, new to this forum I have a issue with a 1979 Clark 35C wheel loader, when the machine is running the brakes will not release and the brake pedal will not move down it has a lot of pressure on it, if you raise the front tires off the ground the tires will not move if turn off the machine the tires will move. I have taken the brake master valve off and taken it apart replaced the o rings and put it back together and put it back on and I still have the same problem. The machine runs good otherwise. Does any one have any ideas on this problem I would greatly appreciate your input. Thanks.
Chuck
Chuck