How do you adjust the clutch brake on a 13 speed eaton fuller?

To adjust the clutch brake on a 13-speed Eaton Fuller transmission, first, ensure the truck is on a flat surface and the engine is off. Locate the adjustment rod connected to the clutch brake and check the gap between the brake and the clutch disc; it should typically be around 1/8 inch. If adjustment is necessary, use a wrench to turn the adjustment nut until the gap is correct. Finally, test the clutch operation to ensure smooth engagement and disengagement.