how to check air brakes on a tractor trailer

Tractor trailers are essential to the transportation industry, as they deliver goods across the country. Proper maintenance and regular inspections of the air brake system are necessary to ensure the safety of the driver, the load being transported, and other drivers on the road. In this article, we will discuss how to check air brakes on a tractor-trailer.

Gather the Tools You Will Need

Before you start, make sure you have the right tools. You will need a flashlight, gloves, a tire gauge, and a brake release tool.

Perform a Visual Inspection

The first step to check the air brakes on a tractor-trailer is to do a visual inspection of the braking system. Walk around the trailer and visually inspect each wheel. Make sure the hoses, connectors, and air chambers are all properly attached. Check for any visible signs of wear or damage. Also, check the brake pads to ensure that they have enough linings.

Check Brake Pressure

Next, you will need to check the brake pressure. To do this, you will need to use your brake release tool. Start by releasing the brake valves on the tractor, and then move to the trailer. Start at the rear of the trailer and work your way forward, checking the brake pressure on each axle. Use the tire gauge to measure the brake pressure on each tire. The pressure should be at least 90 psi on each wheel.

Check the Emergency Brake

The last step in checking the air brakes is to test the emergency brake. Ensure your truck is parked on a level surface, and the wheels are chocked. Set the parking brake on the tractor and then operate the emergency brake on the trailer. The truck should not move when the emergency brake is applied. Test the brake by pulling the tractor forward. If the emergency brake is functioning correctly, the tractor should not move.

Conclusion

The air brake system on a tractor-trailer is essential to the safety of everyone on the road. Regular inspections and proper maintenance are crucial to ensure that the brakes are functioning correctly. By following the steps outlined in this article, you can check the air brakes on your tractor-trailer and transport your goods confidently. Remember, if you find any issues during your inspection, address them immediately before driving your vehicle.