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Inertia Dynamometer Rotor Crack Test Procedure for Air Disc Brakes

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J3080_201803
  • Current
Published 2018-03-23 by SAE International in United States
This Recommended Practice applies to commercial vehicles equipped with air disc brakes and above 4536 kg of Gross Vehicle Weight Rating. Other assessments on the friction material or rotor related to wear, durability, correlation to product life, noise, judder, compliance to specific regulations, etc., are not part of this RP (Recommended practice).
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Brake Drum Qualification Recommended Practice

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J2686_201710
  • Current
Published 2017-10-30 by SAE International in United States
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.
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Test Component Specifications

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J1802/1_201607
  • Current
Published 2016-07-27 by SAE International in United States
This SAE Recommended Practice contains the reference information for SAE J1802.
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External Automatic Slack Adjuster Performance Requirements

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J1513_201607
  • Current
Published 2016-07-14 by SAE International in United States
The performance requirements have been established for external automatic slack adjusters when tested to SAE J1462.
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Service Brake Structural Integrity Test Procedure - Vehicles Over 4500 kg (10 000 lb) GVWR

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J294_201506
  • Current
Published 2015-06-12 by SAE International in United States
This SAE Recommended Practice establishes a method of testing the structural integrity of the brake system of all new trucks, buses, and combination vehicles designed for roadway use and falling in the following classifications: a Truck and Bus—Over 4500 kg (10 000 lb) GVWR b Combination vehicle—Towing vehicle over 4500 kg (10 000 lb) GVWR The test consists of two distinct tests: a Structural Endurance Test followed by a Structural Ultimate Strength Test. NOTE—These two tests originated from separate procedures, and were combined in this Recommended Practice. Each test can be considered to be an independent evaluation of the service brake’s structure. Based on time available, cost limitations, and the desired evaluation and historical data available, either of these tests could be considered as a complete evaluation of the brake’s structure.
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Service Brake Structural Integrity Requirements—Truck and Bus

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J1404_201411
  • Current
Published 2014-11-15 by SAE International in United States
This SAE Recommended Practice presents requirements for the structural integrity of the brake system of all new trucks, buses, and combinations of vehicles designed for roadway use and falling into the following classifications: a Truck and Bus—Over 4500 kg (10 000 lb) GVWR b Combination Vehicles—Towing vehicle over 4500 kg (10 000 lb) GVWR The requirements are based on data obtained from SAE J294.
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Parking Brake Structural Integrity Test Procedure Vehicles Over 4500 kg (10 000 lb) GVWR—Truck and Bus

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J1476_201411
  • Current
Published 2014-11-15 by SAE International in United States
This SAE Recommended Practice establishes a method of evaluating the structural integrity of the parking brake system of all new trucks, buses, and combination vehicles designed for roadway use in the following classifications: TRACTOR, TRAILER, TRUCK, AND BUS: over 4500 kg (10 000 lb) GVWR.
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Brake Block Effectiveness Rating

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J1802_201410
  • Current
Published 2014-10-27 by SAE International in United States
This SAE Recommended Practice provides the test procedure and methods to calculate the effectiveness of brake blocks, using an inertia dynamometer. To minimize testing variability, and to optimize standardization and correlation, a single, high volume size of brake block is specified (FMSI No. 4515E) and evaluated in a reference S-cam brake assembly of 419 mm x 178 mm (16.5 in x 7.0 in) size, using a specified brake drum.
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Brake Effectiveness Marking for Brake Blocks—Truck and Bus

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J1801_201410
  • Current
Published 2014-10-27 by SAE International in United States
This SAE Recommended Practice provides the method to assign numerical values of brake effectiveness, using data from single station inertia dynamometer effectiveness tests, and to identify a uniform procedure to mark these values on the edge of brake blocks in excess of 12.7 mm (0.51 in) in thickness.
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Manual Slack Adjuster Performance Requirements

Truck and Bus Foundation Brake Committee
  • Ground Vehicle Standard
  • J1512_201405
  • Current
Published 2014-05-07 by SAE International in United States
These performance requirements have been established for manual slack adjusters when tested to SAE J1461.
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