Kenworth T700 Deck Plates & Air Line Boxes

Frequently Asked Questions About Kenworth T700 Deck Plates & Air Line Boxes

What is the purpose of a deck plate and air line box on a Kenworth T700?

Deck plates provide a durable, non-slip working surface behind the cab where the frame rails are exposed, giving drivers a safe platform to stand on during hookups and inspections. Air line boxes mount to or near the deck plate area to organize and protect the air and electrical lines that run between the tractor and trailer, keeping them off the ground and away from damage during coupling.

Will a replacement deck plate or air line box fit my Kenworth T700 without modification?

Most deck plates and air line boxes in this category are designed to match the factory mounting locations and bolt patterns used on Kenworth T700 models, so they typically install as a direct replacement. However, frame width, wheelbase, and prior modifications can vary between trucks, so it is a good idea to compare the listed dimensions and mounting hole spacing to your existing part before ordering.

What materials are these deck plates and air line boxes made from, and how do they hold up?

These parts are commonly made from aluminum or steel, sometimes with a diamond-plate or textured surface on the deck plate to improve traction and hide scuffing. Aluminum options resist corrosion well and are lighter to handle, while steel versions offer added strength for heavier-duty use. Finish options may include raw, polished, or painted/coated surfaces depending on the specific product.

How do I install a new deck plate or air line box, and can I do it myself?

Installation generally involves removing the fasteners securing the old component to the frame, positioning the new deck plate or air line box, and bolting it into place using the existing or provided hardware. Many customers handle this as a straightforward DIY job with basic hand tools, though a second person or a jack stand can help support larger deck plates during alignment. If your unit requires drilling new holes or rerouting air lines, having a shop assist can help ensure a clean fit.

How do I know if I need a full deck plate replacement or just an air line box?

If the working surface behind your cab is bent, cracked, or worn smooth, replacing the deck plate itself is usually the right call. If the deck plate is still solid but your air and electrical lines are exposed, sagging, or the mounting box is cracked or missing, you likely only need a new air line box. Many are sold separately, so you can replace just the damaged component rather than the entire assembly.