BRAKE SYSTEM BRAKE SYSTEM specifications can affect the whole system. All of the following areas are interrelated and must conform to original specifications: Brake Adjustment The air brake system of this vehicle was configured for ONE of the fol- lowing operations: tractor or truck, and complies with the respective portions of FMVSS 121. A tractor shall not be operated or configured as a truck, nor shall a truck be op- erated or configured as a tractor, without significant modifications to the air brake system in order to re- tain compliance with FMVSS 121. Contact your dealer for instructions. CAUTION WARNING!
Do not work on the brake system without the parking brake set and wheels chocked securely. If the vehicle is not secured to prevent uncontrolled vehicle movement, it could roll and cause death, serious personal injury or damage to the vehicle. Tire Size Drum brakes a. Cam Radius b. Wedge Angle c. Drum Radius d. Brake Linings e. Brake Chambers 5 To operate your vehicle safely and profitably, you need some understanding of its brake systems. For more on brakes, see the Index, under Brakes. Once a brake system is set to specifications, changing any one of its components or any combination of components may cause the system to not work as well.
All parts have to work together to perform as they should. Any replacement components in your brake system should be exactly equal to the original components. Any changes from the original f. Slack Adjusters Disc Brakes a. Disc Rotors Brake adjustment and brake balance must be set carefully to (1) make the most efficient use of the forces available for braking and (2) allow equal stopping forces at all wheels. 5-66 Y53-6077-1B1 (03/17)