International 9300/9370 Deck Plates-Air Line Box

Frequently Asked Questions About International 9300/9370 Deck Plates-Air Line Box

What is the deck plate and air line box assembly used for on my International 9300/9370?

The deck plate and air line box sit behind the cab on the truck's frame, providing a mounting surface for the air lines, electrical lines, and hoses that run between the cab and trailer. The box also often houses or routes the gladhands and electrical cable, keeping connections organized and protected from road debris while the deck plate provides a stable, walkable surface between the cab and fifth wheel area.

Will this deck plate and air line box fit my specific truck?

These parts are designed to fit International 9300 and 9370 series trucks, but frame width, mounting hole patterns, and factory configurations can vary by model year and build. Before ordering, compare the dimensions and mounting points of the listed part to your existing setup, or check with our sales team using your VIN or truck's build sheet to confirm fit.

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

Most deck plates and air line boxes in this category are constructed from steel or aluminum. Steel versions typically offer strength and durability at a lower cost but may require paint or coating to resist rust, while aluminum versions resist corrosion naturally and weigh less. Check each product listing for the specific material and any finish, such as painted, raw, or diamond-plate texture, since this affects both durability and appearance.

Can I install a replacement deck plate or air line box myself, or do I need a shop?

Many owner-operators and shop technicians replace these parts themselves since installation generally involves unbolting the old unit, transferring or reconnecting air lines and electrical connections, and bolting on the new plate or box. Basic hand tools and some familiarity with air brake lines are usually sufficient, but if your air lines need to be cut, rerouted, or re-fitted, it may be worth having a qualified technician handle that portion to ensure a proper, leak-free connection.

Do these parts affect my truck's DOT inspection or air brake system compliance?

The deck plate itself is primarily a structural and organizational component, but the air line box directly involves the air lines that are part of your truck's air brake system. Any replacement or modification should maintain secure, properly routed, and leak-free air line connections to stay compliant with DOT air brake standards. If you have questions about routing or fitting during installation, consult your maintenance provider or a qualified technician.