Kenworth W900A Deck Plates & Air Line Boxes

Frequently Asked Questions About Kenworth W900A Deck Plates & Air Line Boxes

What are deck plates and air line boxes used for on a Kenworth W900A?

Deck plates are the flat panels mounted behind the cab on the frame rails that provide a walkable, protective surface over the frame and wiring, while air line boxes are enclosures that organize and protect the air and electrical lines that run between the tractor and trailer. Together they help keep components shielded from road debris, moisture, and wear while giving the truck a finished, factory-style appearance.

Will a deck plate or air line box fit my specific W900A without modification?

Fit can vary based on frame width, wheelbase, and how the truck was originally equipped from the factory, so it's important to check listed dimensions and mounting hole patterns against your truck before ordering. Some parts are designed as direct factory replacements, while others may require minor drilling or bracket adjustments to line up properly.

What materials and finishes are available for these parts?

Most deck plates and air line boxes are offered in aluminum or stainless steel, with finish options ranging from mill/brushed finish to polished or diamond plate textures. Stainless steel generally offers better long-term corrosion resistance, while aluminum is lighter, and diamond plate adds extra slip resistance if the deck plate is walked on regularly.

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

Installation is usually straightforward and can typically be done with common hand tools, since most units bolt on using existing mounting points. That said, you'll want to disconnect and support air lines and wiring harnesses carefully during removal and reinstallation so nothing is pinched or damaged when the new part is bolted back into place.

Do these parts include the mounting hardware, brackets, or air lines themselves?

This varies by product, so it's worth checking the item description closely, as some deck plates and air line boxes come with brackets and hardware included while others are sold as the plate or box only. Air lines, fittings, and electrical connectors are generally sold separately unless specifically stated otherwise in the listing.