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This chapter includes inspection checklists, charts and circuit diagrams that will help you complete the inspections you need to make, as well as help you prepare for the Ministry of Transportation air brake endorsement practical examination.
The Seven-Step Air Brake check is designed to test the governor cut-in and cut-out pressures, air pressure leakage, warning buzzer, brake valves and air pressure rebuild rates. Brakes off means the yellow and/or red valve is pushed in (on = valve out).
Usually driven by the vehicle engine, the air compr essor builds the air pressure for the air brake system. The air compressor is typically cooled by the engine coolant system and lubricated by the engine oil sup ply. (Certain models have self-lubricated and/or air-coo led versions available.)
placed in the correct operating environment, air disc brakes can be used successfully on today’s modern commercial vehicle. Sizing the brake to meet the specifi c load carrying requirements of the trailer can improve the vehicle’s average stopping distances.
Air brake system means a system that uses air as a medium for transmitting pressure or force from the driver control to the service brake, including an air-over-hydraulic brake
Air brakes use compressed air to make the brakes work. Air brakes are a good and safe way of stopping large and heavy vehicles, but the brakes must be well maintained and used properly. Air brakes are really three different braking systems: service brake, parking brake, and emergency brake. •= The service brake system applies and releases the ...
What You’ll Learn. After reading this chapter you will be able to: identify the components of an air brake system. explain how an S-cam foundation brake works. describe what happens when one or more air brake sys tem components fail. explain how trailer brakes are applied. Why Air Brakes?
