This SAE Recommended Practice is intended for qualification testing for brake drums used on highway commercial vehicles with air brakes using an inertia-dynamometer procedure.
This Recommended Practice consists of two distinct tests: Part A - durability and speed maintenance test, and Part B - heat check drag sequence test. Each test can be considered to be an independent evaluation of the brake drum which tests different properties.
Rationale
J2686 has been reaffirmed to comply with the SAE Five-Year Review policy.
The Truck and Bus Foundation Brake Committee of the Truck and Bus Brake and Advanced Driver Assistance Systems Steering Committee is responsible for developing, reviewing, and approving recommended practices, standards, and information reports relative to foundation brakes; including brake lining friction materials, manual and automatic brake adjusters and their interfacing as utilized on trucks, tractor-trailer combinations, and buses over 10,000 lbs (4500 Kg) GVWR designed primarily for highway use. The activities of this committee are to be directed so as to concentrate on heavy duty foundation brakes and their corresponding lining friction materials, and not, in any way to duplicate the efforts of any other SAE committee.
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J2686_201710
Brake Drum Qualification Recommended Practice
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Brake Drum Qualification Recommended Practice
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