International 4700-4900 Deck Plates-Air Line Box

Frequently Asked Questions About International 4700-4900 Deck Plates-Air Line Boxes

What is a deck plate air line box and what does it do?

A deck plate air line box is the component mounted behind the cab on your International 4700 or 4900 that houses and protects the air and electrical lines running between the tractor and trailer. It typically combines a flat deck plate surface with a built-in enclosure that organizes glad hands, electrical cord connections, and associated lines, keeping them secure and protected from road debris while providing a clean mounting surface behind the cab.

Will this deck plate air line box fit my specific International 4700 or 4900 model year?

Fitment can vary by model year, cab configuration, and frame width, so it is important to check the listed specifications and compare them against your truck before ordering. If you are unsure, having your VIN or original part number on hand and reaching out to our parts team is the best way to confirm a proper fit for your specific truck.

What material 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 steel or aluminum, depending on the specific part. Steel versions offer durability and strength, while aluminum options provide lighter weight and better corrosion resistance. Finish options often include raw or painted steel, as well as bare or polished aluminum, so check each individual listing for the exact material and finish available.

Can I install this myself, or does it require professional installation?

Many deck plates and air line boxes are designed as direct bolt-on or weld-on replacements for the original equipment, and an experienced DIYer with basic tools can often handle the installation. However, because the part involves air lines and electrical connections critical to safe trailer operation, we recommend having the installation checked by a qualified technician if you are not fully comfortable working with these systems.

Will a replacement deck plate or air line box hold up to daily use and weather exposure?

These parts are built to withstand regular exposure to road debris, moisture, and temperature changes since they are mounted in an exposed location behind the cab. That said, the level of durability can depend on the material and finish you choose, with painted or coated steel and aluminum options generally offering better long-term resistance to rust and corrosion than bare steel.