Recommended Practice

Troubleshooting Common Transit Bus S-cam and Air Brake Complaints

Abstract

This document establishes a Recommended Practice for troubleshooting common braking-related complaints on transit buses equipped with S-cam brakes. Individual operating agencies may modify these guidelines to accommodate their specific equipment and mode of operation. Test results must meet or exceed
federal, state or other local regulatory agency requirements if different from the recommendations outlined in this document.

Document History
Document Number Version Publication Date Publication Related Information
APTA BTS-BC-RP-005-10 Rev. 1 10/06/2016 Published Current

Keywords

brake performance, brakes, bus brake, deceleration, transit bus, stopping, PBBT

Summary

This document establishes a recommended practice for transit bus front/rear axle S-cam brake reline. Individual operating agencies should modify these guidelines to accommodate their specific equipment and mode of operation. The following recommended practices and guidelines assume that the end users have sufficient skills and knowledge to repair and maintain the related systems at a journeyman level. These skills and knowledge must also include a fluent understanding of safe shop working practices, not only for the agency but also OSHA/CCOHS/provincial/federal/state and local safety standards. A familiarity

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