Off-Vehicle Brake Testing for Service Brakes Over 10000 Pounds GVW Air, Hydraulic, and Mechanical Actuation
- Ground Vehicle Standard
Civilian, commercial, military, and militarized-commercial ground-wheeled vehicles such cargo trucks, vocational vehicles, truck tractors, trailers, and specialized support and engineering equipment under the generic heading of ground vehicle “dry” brake systems (GVDBS).
Hydraulic, air, and mechanical “dry” disc brake and drum brake systems, when used as service brakes, including service brakes (only), when used as emergency and/or parking brakes.
Hydraulic, air, and mechanical “dry” disc brake pad assemblies and rotor assemblies.
Hydraulic, air, and mechanical “dry” drum brake shoe assemblies and drum assemblies.
Hydraulic, air, and mechanical brake “block” when intended for use on a. through d. above, except for those vehicles, pad assemblies, and shoe assemblies specifically procured for military use and/or tested under ATPD-2354. It must be noted that the U.S. Government’s Military Services buys only assemblies, and doesn’t normally use “brake block” and relined brake shoes/pads; therefore, testing using separate brake “block” was specifically excluded from ATPD-2354 by the original authors.
Data Sets - Support Documents
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|Table A1||Inertia-dynamometer testing mathematical calculations and equations|
|Table C1||Test plans for disc brake pad assemblies, drum brake shoe assemblies, and brake block|
|Table C2||Test plans for disc brake rotor and drum brake assemblies|
|Table D1||Test procedure for vehicles up to 12000 pounds of GVWR|
|Table D2||Test procedures for vehicles above 12001 pounds and below 45000 pounds of GVWR|
|Table D3||Test procedures for vehicles above 45001 pounds of GVWR|
|Table E1||Vehicle category|
|Table E2||Rotor crack resistance test for vehicles CB1 and TV1|
|Table E4||Rotor crack resistance test for vehicles CB2, CB3, TV2, and TV3|
|Table E6||Rotor crack resistance test for vehicles ST1 and ST2|
|Table E8||Rotor crack resistance test for vehicles ST3 and ST4|
|Table E13||Rotor crack resistance test for vehicles ST3 and ST4|
|Table E15||Maximum failure levels allowable|
The Truck and Bus Brake Systems Committee of the Truck and Bus Brake and Stability Control Steering Committee is responsible for developing, reviewing, and approving recommended practices, standards, and information reports related to brake systems of trucks, tractor-trailer combinations and buses over 10,000 lbs (4500 Kg) GVWR designed primarily for highway use.