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Vehicle Inspections Part 1-In Cab Inspections

Image showing the interior of a vehicle dashboard with a driver conducting an in-cab inspection.

Vehicle Inspections Part 1-In Cab Inspections

Comprehensive In-Cab Vehicle Inspection Guide for the CDL Skills Test

In-Cab Vehicle Inspection

When conducting a vehicle inspection, it’s important to thoroughly check various areas of the vehicle.

1. Start with safety equipment:

  • Ensure the seatbelt is mounted and secured properly.
  • Verify the presence of a mounted and charged fire extinguisher.

2. Check the Horns:

  • Make sure the horns function properly and are securely mounted.

3. Focus on visibility:

  • Examine the windshield, windows, mirrors, etc., for any cracks or damage.
  • Keep the windshield clean for optimal visibility.
  • Inspect windshield wipers and washers to ensure they work effectively.
  • Verify the functionality of the heater or defroster for cold weather conditions.

4. Inspect the lights:

  • Check the brightness of the dashboard lights.
  • Examine the condition and function of the oil pressure gauge, air pressure gauge, and voltameter.
  • Ensure the hazard lights are functioning correctly.

5. Conduct a Safe Start:

  • Depress the clutch, ensure the vehicle is in neutral, and start the engine.

6. Brake Tests:

  • Perform a “tug test” with the parking brake to ensure it holds the vehicle.
  • Conduct a service brake test by releasing the parking brake and moving forward at about 5 mph.
  • If the vehicle has air brakes, perform an airbrake inspection.
    • Test the compressor to ensure it builds air within 45 seconds.
    • Conduct a system leak check by watching the air gauge for pressure loss.
    • Perform static pressure and brake pedal pressure tests within specified limits.
    • Check the low alarm to engage at around 60 psi.
    • Ensure the parking brakes are set between 20 and 40 psi.

7. Hydraulic Brake Test.
For vehicles with hydraulic brakes, pump the pedal three times and hold it for 5 seconds to check for proper resistance.

  • If your vehicle has electric boosters,.

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