7 step air brake test Flashcards

#5Safe start the truck and make sure the compressor builds air from 85 to 100 PSI at idle speed in 45 seconds #4Continue to pump the service brake and the parking brakes should apply between 45 and 20 PSI #7Release park brakes and pull forward at 5 mph. Apply the service brake and it should come to a smooth stop. It should not pull to right or left or lunge forward #6With both park brakes set, place in low gear and gently tug against both tractor and trailer.Release tractor brake and gently tug against trailer brake.Apply tractor brake & release trailer brake and gently tug against tractor brakes.#2Apply the service brake, after the initial loss, you should not lose more than 4 PSI in 60 seconds.#3Pump the service brake and the light and buzzer should come on and stay on by 55 PSI #1. Start with a full tank of air. Put the vehicle in gear. Turn the engine off and the key back on. Release the park brakes. After the initial loss, you should not lose more than