Kenworth W900B/W900L Deck Plates & Air Line Boxes

Frequently Asked Questions About Kenworth W900B/W900L Deck Plates & Air Line Boxes

What are deck plates and air line boxes used for on a Kenworth W900B/W900L?

Deck plates are the flat panels mounted behind the cab on the frame rails that provide a walking or standing surface and help protect the frame from road debris, while air line boxes house and organize the air and electrical lines that run between the tractor and trailer. Together, these components keep the back-of-cab area clean, functional, and protected while giving your truck a finished look.

Will these deck plates and air line boxes fit my specific W900B or W900L?

Fitment can vary depending on frame rail spacing, cab configuration, and whether your truck has a factory or aftermarket setup, so it is important to check the listed specifications and measurements for each product before ordering. If you are unsure about fitment, it is a good idea to measure your existing setup or reach out to our team for guidance before purchasing.

What materials are these deck plates and air line boxes made from, and what finish options are available?

Most deck plates and air line boxes in this category are constructed from durable materials like steel or aluminum, often finished in polished, diamond plate, or painted options to match the rest of your truck. The right choice depends on how much maintenance you want to do, with polished aluminum offering a bright look that requires regular upkeep and painted steel providing a lower-maintenance alternative.

How difficult is it to install a replacement deck plate or air line box?

Installation typically involves removing the factory hardware, positioning the new component on the frame rail, and bolting it into place, which most experienced truck owners or shop technicians can handle with basic tools. Since exact mounting points and hardware can differ by model year and configuration, we recommend having some mechanical experience or a shop's help if you are not familiar with this type of installation.

Do these parts affect how air lines and electrical cables are routed and protected?

Yes, air line boxes are designed to keep hoses and cables organized and shielded from road grime, moisture, and wear that can occur when lines are left exposed. Choosing a properly fitted box helps reduce the risk of chafing or damage to your air and electrical lines, which can support more reliable performance over time.