PrE-TRIP AIR BRAKES INSPECTIONs

Item Name

Performing Pre-Trip Form-A Inspection

Standard of Performance 

Must Tell the examiner what are you inspecting for as you Demonstrate to examiner the inspection you are performing.

Rolldown your window

Air Brakes Inspection

Check for (1) Leaks in air break, (2) Low-pressure Warning, and (3) Deployment of Emergency Breaks

Check for Leaks in Air Break

(1) Turn-off the engine, (2)turn key to On-Position Activate gages (truck chucked or in gear to avoid Rolling) (2) Roll-Down your window, (3) Release Truck and Trailer parking Brakes, (4) Depress brake pedal and wait until pressure gages stabilize (5) TELL EXAMINER: I will depress the brake pedal and time it for One Minute I should not loose more than FOUR POUNDS of air pressure in ONE MINUTE , (6) Keep your foot on the brake AT ALL TIMES and start ONE-Minute timer, TELL EXAMINER: One-Minute Timer has started, I am also listening for audible sounds of leak (ear at window), (7) AFTER one-minute ends, TELL EXAMINER: : The minute has ended and I did not loose more than Four-Pounds of air Pressure while pointing at the air-pressure gage, I also did not hear any audible leak

Check for Low-Pressure warning:

(1) TELL EXAMINER: I will depress the brake pedal repeatedly to cause loos of air pressure, a warning light should come on and a buzzer should sound when the air pressure goes down to about 60 PSI (2) Depress and Release the brake pedal until light and buzzer comes on; (3)TELL EXAMINER: The warning light and Buzzers came on, the low air pressure warning system is working properly

Check for Emergency Brake deployment:

(1) TELL EXAMINER: I will keep depressing the brake pedal repeatedly to cause further loos of air pressure, the parking brakes should deploy automatically when the air pressure goes down to a dangerous level of about 40 to 20 PSI (2) Depress and Release the brake pedal until both parking brake knobs pop-out, (3) TELL EXAMINER: The parking brake has automatically deployed, the emergency brake system is working properly. This conclude the Air Brake Check.


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