Most likely the brake pedal shaft and the clutch pedal pivot is rusted together. This is a common problem on these machines. I had to drill my brake shaft out on a lathe and make a new one. I put a grease fitting in the end of the new shaft and drilled to get grease into the clutch pedal/brake shaft area. Requires removal of the torque tube to free the shafts unless you get lucky with generous amounts of your favorite penetrate and working the pedals if you can get movement.