Ontario Air Brake Tests

This video serves as a comprehensive guide for conducting the Air Brakes Practical License Exam in Ontario, Canada, specifically for obtaining a Z endorsement. The presenter, Jakob, demonstrates the necessary tests and explains the required verbal cues and safety standards to pass the exam. Key Air Brake Tests Covered: Low Air Warning Test: (0:18) Ensure pressure is above 90 PSI, then fan the brakes until the warning activates. It must activate at or above 55 PSI. Air Pressure Build-up Test: (1:06) Start the engine, keep RPMs between 600-900, and time how long it takes for pressure to rise from 85 PSI to 100 PSI. It must take 2 minutes or less. Governor Settings Test: (2:18) Check the cut-out (needle stops, dryer exhausts) and cut-in (needle rises, compressor starts) pressures. Cut-out should be between 100-145 PSI, and cut-in should be above 80 PSI. Air Loss Rate Test: (4:00) With wheels chocked and brakes released, shut off the engine, make a full brake application, and measure pressure loss over one minute. The limit is 4 PSI for a truck and trailer. Automatic Trailer Brake Application: (6:42) With the trailer supply valve pulled, check that the trailer brakes apply automatically. Tractor Protection System: (7:17) Disconnect the service line, make a brake application, and verify there is no air loss from the tractor. Drain Air Tanks: (9:30) Manually drain the wet, secondary, and primary tanks, checking for excessive moisture or debris. Brake Adjustment Check: (11:09) Measure the push rod travel to ensure it is within the limits for the specific brake chamber type (e.g., 2.5 inches limit for a 24LS chamber). Defective Vehicle Conditions: (15:40) Final demonstration of knowledge regarding the responsibility to report and not operate a defective vehicle.