What can a defective push-pull valve cause?

A defective push-pull valve can lead to premature spring brake application and brake drag. The push-pull valve plays a crucial role in controlling the application and release of the spring brakes in a vehicle's air brake system. If this valve malfunctions, it may not fully release the springs when the driver applies the brakes, which can result in unintended brake application and cause the brakes to drag.

This situation can lead to increased wear on the brake components, overheating, and potential safety hazards due to inconsistent braking performance. Therefore, recognizing the importance of the push-pull valve's proper function is essential for maintaining optimal brake operation and ensuring vehicle safety.