Freightliner FLD SBA Deck Plates & Air Line Boxes

Frequently Asked Questions About Freightliner FLD SBA Deck Plates & Air Line Boxes

What is the purpose of a deck plate and air line box on a Freightliner FLD SBA?

The deck plate sits behind the cab on the frame rails, providing a mounting surface for the air lines, electrical cables, and gladhands that connect to the trailer. The air line box houses and protects these lines and connections from road debris, weather, and wear, helping keep your air and electrical systems organized and functioning properly.

Will this deck plate or air line box fit my specific Freightliner FLD SBA?

Deck plates and air line boxes are typically built to match the frame width, hole spacing, and mounting configuration of the FLD SBA model. Because these can vary slightly by year and frame setup, it is important to compare measurements and mounting hole patterns with your existing part, or check with our sales team to confirm fit before ordering.

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 for the FLD SBA are constructed from steel or aluminum. Steel versions are often available painted or primed, while aluminum options may come in a mill finish or polished/diamond plate finish for a more custom look. Choosing the right material and finish depends on your preference for durability, weight, and appearance.

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

Installation generally involves removing the old unit by unbolting it from the frame rails, then bolting the new deck plate or air line box into place using the existing mounting holes. Most installations can be done with common hand tools, but it is a good idea to have a second person help support the part during removal and installation, since these components can be heavy and awkward to maneuver alone.

Why would I need to replace my deck plate or air line box instead of repairing it?

Deck plates and air line boxes are exposed to constant road debris, moisture, and vibration, which can lead to rust, cracking, or bent mounting points over time. If the frame or mounting surface is compromised, or if the air lines and electrical connections are no longer properly protected, replacement is usually the safer and more reliable option compared to patching up a damaged unit.