English Français Español

Operation Airbrake Inspection Procedure

Inspection Items

  • Driver’s license
  • Registration
  • Low air warning device
  • Pushrod travel (adjustment)
  • Brake linings/drums
  • Air loss rate (if leak detected)
  • Tractor protection system

Operation Air Brake Inspection Procedure

Step 1: Choose the inspection site

Step 2: Safety considerations

Step 3: Check air brake mechanical components

Step 4: Check steering axle air brake mechanical components

Step 5: Build the air pressure to 90-100 psi

Step 6: Check brake adjustment

Step 7: Check the tractor protection system

Step 8: Check the air brake ABS system (if applicable)

Step 9: Test low air pressure warning device

Step 10: Test air loss rate

Step 11: Finalize paperwork and provide the results to the driver (e.g., out-of-service, etc.)

393.40-393.55 Subpart C – Brakes DOT Interpretations?
393.40 Required brake systems. Yes
393.41 Parking brake system. Yes
393.42 Brakes required on all wheels. Yes
393.43 Breakaway and emergency braking. Yes
393.44 Front brake lines, protection. Yes
393.45 Brake tubing and hoses; hose assemblies and end fittings.
393.46 [Reserved]
393.47 Brake actuators, slack adjusters, linings/pads and drums/rotors.
393.48 Brakes to be operative. Yes
393.49 Control valves for brakes.
393.50 Reservoirs required.
393.51 Warning signals, air pressure and vacuum gauges. Yes
393.52 Brake performance. Yes
393.53 Automatic brake adjusters and brake adjustment indicators.
393.55 Antilock brake systems.
Appendix G Appendix G to Subchapter B—Minimum periodic inspection standards

NOTE: When you access these regulations by clicking on the links, you are leaving CVSA’s website and visiting the U.S. Department of Transportation’s Federal Motor Carrier Safety Administration website.