Did You Know 🤷🏿♂️?
That the air brakes in a truck ⛟ work in the opposite manner of hydraulic brakes. 🤔
°When the brakes on a hydraulic system are
pressed, the calipers are pushed to the rotor,
causing the truck to stop.
°Air brakes work the EXACT opposite.
•The air in the brake system actually pushes
the calipers away from the drums.
•When the brake pedal is pressed, air is
released from the brake lines and applies
pressure to the drum.
•This is why it's so important to have an
adequate air supply to the brake lines.
How to Release the Brakes:
1. Start the truck!
2. Locate the Air Pressure Gauge on the dash.
3. Watch the needle on the gauge as it rises.
An indicator makes a buzzing sound as the
4. The air pressure needs to build to 120 lbs.
°The buzzing stops at 60 lbs.
°You will hear the air bags settle under the
truck once the pressure stops building.
5. Press the yellow "Parking" button, keep your
foot on the brake pedal. This releases the
truck's air brakes.
6. If a trailer is attached, press the red "Trailer"
button to release the trailer brakes.
°Keep your foot on the brake pedal to keep
the truck from rolling.
***The buttons will not move if the air supply
has not built pressure.
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