803714 Seat Valve Kit Freightliner / Mack / Kenworth / Peterbilt / International Multiple Application

It’s designed for multiple applications across several common commercial truck makes. It is commonly used as a Freightliner seat valve kit, Mack seat valve kit, and Kenworth seat valve kit. Always confirm the seat and valve part number match your specific seat configuration before installing.

It supports air systems up to 200 psi, which covers typical heavy-duty air-ride seat supply pressures. If your system is regulated downstream, verify the regulator output and condition to prevent pressure spikes. Replace worn air lines or fittings at the same time to reduce leaks and improve seat performance.

It can help when the issue is a leaking or sticking seat control valve, which is a common cause of slow leaks and sagging. If the seat still won’t hold air after installing the seat valve kit 803714, check the air supply line, quick-connect fittings, and the seat air bag for pinholes. A quick soap-and-water leak test around connections can pinpoint the exact leak source.