Spring Brakes Check

Spring Brakes Check

Spring brakes will activate when air pressure drops between 25-45 PSI.

  • Check manufacturer’s specifications for exact pressure.

System check

  • Continue depressing and releasing the brake from the low air pressure warning test.

Once air pressure reaches 25-45 PSI, the spring brakes activate.

  • Parking brakes knob (yellow) will pop out on straight trucks.
  • Trailer brakes knob (red) will also pop out on combination units with air brakes