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Off-Vehicle Brake Testing for Service Brakes Over 10 000 lb GVW—Air, Hydraulic, and Mechanical Actuation
- Ground Vehicle Standard
- J2806_200906
- Issued
Downloadable datasets available
Annotation ability available
Sector:
Issuing Committee:
Language:
English
Scope
Subject document is specifically intended for service brakes and service brakes when used for parking and/or emergency brakes (only) that are commonly used for automotive-type, ground wheeled vehicles exceeding 4536 kg (10 000 US lb) Gross Vehicle Weight Rating (GVWR). Subject specification provides the off-vehicle procedures, methods, and processes used to objectively determine suitability of tactical and combat ground wheeled vehicle brake systems and selected secondary-item brake components (a.k.a. aftermarket or spare parts), including brake “block” for commercial applications only, specifically identified within subject document. Subject specification is primarily based on known industry and military test standards utilizing brake inertia dynamometers. Targeted vehicles and components include, but may not be limited to the following:
-
a
Civilian, commercial, military, and militarized-commercial ground wheeled vehicles such cargo trucks, vocational vehicles, truck tractors, trailers, specialized support and engineering equipment under the generic heading of Ground Vehicle “Dry” Brake Systems (GVDBS).
-
b
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.
-
c
Hydraulic, air, and mechanical “dry” disc brake pad assemblies and rotor assemblies.
-
d
Hydraulic, air, and mechanical “dry” drum brake shoe assemblies and drum assemblies.
-
e
Hydraulic, air, and mechanical brake “block” when intended for use on a. thru 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 such the US 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.
Rationale
Subject Recommended Practice, a “new document”, was designed and intended to provide the tools needed to objectively determine suitability for all ground wheeled vehicle brake systems and selected spare parts (secondary item components), to include research and development programs. Subject document is essentially a "specification of specifications" focused on the use of inertia brake dynamometers for system and selected components comparison without the need for traditional and resource-intensive on-vehicle testing for all ground wheeled vehicles exceeding 4536 kg (10 000 US lb) Gross Vehicle Weight Rating (GVWR), and limited other specified opportunities.
Recommended Content
| Ground Vehicle Standard | Off-Vehicle Brake Testing for Service Brakes Over 10000 Pounds GVW Air, Hydraulic, and Mechanical Actuation |
| Ground Vehicle Standard | Drum and Disc Brake Static Performance Test Equivalency |
| Ground Vehicle Standard | FMVSS 105 Inertia Brake Dynamometer Test Procedure for Vehicles Above 4540 kg GVWR |
Topic
Data Sets - Support Documents
| Title | Description | Download |
|---|---|---|
| Unnamed Dataset 1 | ||
| Unnamed Dataset 2 | ||
| Unnamed Dataset 3 | ||
| Unnamed Dataset 4 | ||
| Unnamed Dataset 5 | ||
| 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 12 000 lb GVWR | |
| TABLE D2 | TEST PROCEDURES FOR VEHICLES ABOVE 12 001 lb AND BELOW 45 000 lb OF GVWR | |
| TABLE D3 | TEST PROCEDURES FOR VEHICLES ABOVE 45 001 lb OF GVWR | |
| TABLE E1 | VEHICLE CATEGORY | |
| TABLE E2 | ROTOR CRACK RESISTANCE TEST FOR VEHICLES CB1, AND TV1 | |
| TABLE E3 | ROTOR STRENGTH TEST FOR VEHICLES CB1, AND TV1 | |
| TABLE E4 | ROTOR CRACK RESISTANCE TEST FOR VEHICLES CB2, CB3, TV2, AND TV3 | |
| TABLE E5 | ROTOR STRENGTH TEST FOR VEHICLES CB2, CB3, TV2, AND TV3 | |
| TABLE E6 | ROTOR CRACK RESISTANCE TEST FOR VEHICLES ST1 AND ST2 | |
| TABLE E7 | ROTOR STRENGTH FOR VEHICLES ST1 AND ST2 | |
| TABLE E8 | ROTOR CRACK RESISTANCE TEST FOR VEHICLES ST3 AND ST4 | |
| TABLE E9 | ROTOR STRENGTH TEST FOR VEHICLES ST3 AND ST4 | |
| TABLE E10 | DRUM CRACK RESISTANCE TEST FOR VEHICLES CB AND TV | |
| TABLE E11 | DRUM STRENGTH TEST FOR VEHICLES CB AND TV | |
| TABLE E12 | DRUM CRACK RESISTANCE TEST FOR VEHICLES ST | |
| TABLE E13 | ROTOR CRACK RESISTANCE TEST FOR VEHICLES ST3 AND ST4 | |
| TABLE E14 | ROTOR CRACK RESISTANCE TEST FOR VEHICLES ST3 AND ST4 | |
| TABLE E15 | DRUM STRENGTH TEST FOR VEHICLE ST | |
| TABLE E16 | MAXIMUM FAILURE LEVELS ALLOWABLE |
Issuing Committee
Truck and Bus Brake Systems Committee
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.
Reference
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