Kenworth W900B/W900L Air Springs & Level Valves

Frequently Asked Questions About Kenworth W900B/W900L Air Springs & Level Valves

How do I know if an air spring or level valve is compatible with my Kenworth W900B or W900L?

Compatibility depends on your truck's specific suspension setup, axle configuration, and model year, since Kenworth made changes to suspension components across production runs. Always check the part number against your truck's build sheet or existing component, and compare mounting dimensions, bracket style, and height specifications before ordering. If you are unsure, our team can help you cross-reference part numbers to confirm a proper fit.

What are the signs that my air spring or level valve needs to be replaced?

Common signs include a truck that sits unevenly or too low, a rough or bouncy ride, visible cracks or bulges in the air spring rubber, air leaks you can hear near the suspension, or a level valve that fails to adjust ride height correctly. If your truck is slow to level out after loading or unloading, the level valve linkage or valve itself may be worn or stuck.

Can I install a new air spring or level valve myself, or should I have a professional do it?

Many experienced truck owners and shop technicians replace air springs and level valves themselves, since the process generally involves releasing air pressure, unbolting the old component, and installing the new one with matching brackets and linkage. However, because proper ride height and valve linkage adjustment are critical to how the suspension performs, we recommend having the work done by someone familiar with air suspension systems, or having the ride height verified after installation.

Do these air springs and level valves come with the mounting hardware and linkage needed for installation?

This varies by product, so check the specific listing details before ordering. Some air springs include top and bottom mounting plates, while others require you to reuse your existing hardware. Level valves may or may not include the linkage rod and arm, so confirm what is included and what you may need to source separately.

What material and quality differences should I look for when choosing an air spring?

Air springs are typically made from reinforced rubber bellows designed to handle repeated flexing, road debris, and temperature extremes, so look for products from reputable manufacturers with a track record in heavy-duty trucking applications. Level valves are usually built with metal housings and internal components designed to hold up under constant air pressure cycling. Choosing quality components helps ensure consistent ride height control and reduces the likelihood of premature air leaks or failure.