how to test the tractor protection valve

Tractor protection valve is an essential safety component that ensures the smooth functioning of heavy machinery. It's responsible for stopping the flow of air to the trailer brakes in the event of a separation between the tractor and the trailer. Testing the tractor protection valve is necessary to ensure proper functioning, avoid accidents down the line, and prevent any unforeseen expenses. In this article, we will discuss how to test the tractor protection valve.

Visual Inspection

Before testing the tractor protection valve, it's essential to conduct a visual inspection to ensure that it's in excellent condition. Check for any visible signs of wear and tear or damage. Look for cracks, dents, or any other severe damages. The valve body and the brake lines should be free from corrosion and should have no debris. If any visible damages are detected, replace the valve without further ado.

Functional Testing

To test the tractor protection valve, begin with functional testing. First, engage the tractor parking brake. Then, start the engine, and attach the glad hands to the trailer. With the brakes applied on the trailer, begin to release the tractor parking brake slowly. The brake pedal should be pushed down to build up the air pressure in the system slowly. Ensure the air pressure gauges on both the tractor and trailer are working. Anything below the required pressure will mean that the tractor protection valve isn't working properly.

Physical Testing

Physical testing of the tractor protection valve involves simulating a possible trailer disconnect to verify if the valve is working as expected. To do this, start the engine and attach the glad hands to the trailer with the brakes released. Depressurize the system by pushing down the brake pedal until the pressure falls to 60 PSI. Next, pull the red emergency line on the trailer, simulating the trailer disconnecting from the tractor. The tractor protection valve should hold the air pressure in the brake lines. A loss of air pressure in the lines indicates that the valve isn't working properly, and you should replace it.

Final Inspection

Once the testing is completed, conduct a final inspection of the valve system. Check the valve body and brake lines for any leaks or damages. Ensure that the spring brake chambers are functioning correctly. If everything checks out, and you're confident that the valve is working as intended, you're good to go. But if you have any doubts or concerns, replace the valve without delay to avoid potential accidents.

Conclusion

Testing the tractor protection valve regularly is essential to ensure the safety of heavy machinery operators and avoid unforeseen expenses. A faulty valve can lead to brake failures or even complete separation between the tractor and the trailer. By conducting visual, functional, and physical testing, you can verify that the valve system is working as intended, and take corrective action if necessary. Follow these simple tips to keep your tractor protection valve in top-notch working condition.