Driveline Parking Brake Test Procedure for Medium Duty Vehicles

This SAE Recommended Practice establishes uniform test procedures for friction based parking brake components used in conjunction with hydraulic service braked vehicles with a gross vehicle weight rating greater than 4500 kg (10 000 lb). The components covered in this document are the primary actuation and the foundation park brake. Various peripheral devices such as application dashboard switches or indicators are not included. These test procedures include the following:a Brake Related Tests1 Brake Functional Performance2 Brake Dynamic Torque Performance3 Brake Corrosion Resistance4 Brake Endurance with Torque5 Brake Endurance without Torque6 Vibration Resistance7 Brake Ultimate Static Load8 Brake Lining Wear Adjuster Functionb Actuation Related Tests1 Mechanical Actuator Functional Performance2 Mechanical Actuator Endurance3 Mechanical Actuator Quick Release4 Mechanical Actuator Ultimate Load5 Spring Apply Actuator Functional Performance6 Spring Apply Actuator Operating Temperature Range7 Spring Apply Actuator Endurance8 Spring Apply Actuator Corrosion Resistance9 Spring Apply Actuator On-Off Switch10 Spring Apply Actuator Vibration