on the brake valve their is an allen head bolt, loosen it so that you have about 2 threads holding it. then look down at the air cleaner toward the hydrostat. straight down from the cap of the air filter. their is an octagon stud with a jam nut.jam nut takes a 19 mm socket. I loosen the jam nut and the stud comes with it.screw the nut down till only 2 threads show. screw it back in an tighten. this is to help release the brake.pump brake pedal with your hand untill pedal is tight. jack up truck on 1 side and you should be able to push the drive wheel with your hand