107430 Air Brake Protection Valve for Mack TP-5 Valves Application

The tp-5 protection valve is an air brake protection valve designed to help protect the tractor’s air supply if a trailer air line fails or a trailer breaks away. It works as a tractor protection valve by shutting off or limiting air flow to the trailer side when pressure drops. This helps maintain braking capability on the tractor.

Check the part number (PAI 107430 / MPN 107430) and verify it matches your Mack TP-5 valve application. Compare the connection style and overall dimensions and confirm compatibility with the existing protection valve on your truck. If you’re unsure, cross-reference your VIN or the original valve number with the supplier before ordering.

Yes, a failing tp-5 protection valve can cause air delivery issues to the trailer, leading to delayed trailer brake response or unexpected air loss. Because it functions as part of the tractor protection valve and trailer protection valve circuit, leaks or sticking can change how air is routed and protected. If symptoms appear, inspect for leaks and replace the air brake protection valve if it doesn’t hold pressure properly.