Mack RD Truck Deck Plates & Air Line Boxes

Frequently Asked Questions About Mack RD Truck Deck Plates & Air Line Boxes

What are deck plates and air line boxes used for on a Mack RD truck?

Deck plates are the flat, often diamond-plate panels mounted behind the cab on the truck's frame deck, providing a durable walking or mounting surface and a finished look to the chassis. Air line boxes are mounted on or near the deck plate and house the air and electrical connections that run to the trailer, keeping the hoses and lines organized, protected, and accessible for hookups.

Will a deck plate or air line box fit my specific Mack RD model year?

Frame widths, mounting hole patterns, and air line box configurations can vary between Mack RD model years and cab styles, so it's important to check the listed specifications against your truck's measurements before ordering. If you're unsure, comparing your existing part's dimensions and bolt pattern to the product listing, or contacting our team with your VIN or model details, is the best way to confirm fit.

What materials and finishes are available for these parts?

Deck plates and air line boxes are commonly available in diamond-plate aluminum or stainless steel. Aluminum options are lighter weight and resist rust, while stainless steel offers added durability and a polished appearance. Finish choices typically include raw aluminum, polished stainless, or a mirror-finish stainless for a more custom look.

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

Most deck plates and air line boxes are designed as direct bolt-on replacements using the existing mounting holes on your frame. Installation generally involves unbolting the old unit, transferring or reconnecting the air and electrical lines, and securing the new plate or box in place with the appropriate hardware. Basic hand tools are usually sufficient, though it's a good idea to support air lines and fittings carefully during removal to avoid damage.

How do I keep a stainless or aluminum deck plate looking good over time?

Regular washing with mild soap and water helps prevent road grime and salt buildup that can lead to corrosion or dulling, especially on polished stainless finishes. For polished or mirror-finish pieces, using a metal polish designed for stainless or aluminum periodically will help maintain shine and protect against pitting from road debris and weather exposure.