Western Star 4700 Deck Plate-Air Box

Frequently Asked Questions About Western Star 4700 Deck Plate-Air Box

What is a deck plate and air line box used for on a Western Star 4700?

The deck plate mounts behind the cab and provides a flat surface for routing and securing air lines and electrical connections to the trailer. The air box houses the glad hands and electrical sockets, keeping them organized, protected, and easy to access when hooking up a trailer.

Will this deck plate and air box fit my Western Star 4700 without modification?

These parts are designed to match the mounting points and frame layout used on the Western Star 4700, so fitment is generally direct. Because frame configurations and prior modifications can vary from truck to truck, it's a good idea to compare the bolt pattern and dimensions of the part you're ordering against your existing setup before installation.

What material and finish options are available?

Deck plates and air boxes are commonly available in aluminum or steel construction, with finish options such as plain, painted, or polished/diamond plate depending on the specific part. Aluminum options tend to resist corrosion better and weigh less, while steel offers added durability in high-impact areas.

Can I install this myself, or do I need a professional?

Most deck plates and air boxes bolt into existing mounting locations using factory holes, making them suitable for installation with basic hand tools and mechanical experience. If your truck's air lines or electrical wiring need to be rerouted or extended to fit the new component, it may be worth having a qualified technician handle that portion of the job.

Do these parts affect DOT compliance or inspection requirements?

The deck plate and air box themselves are not typically DOT-regulated items, but they do house components -- glad hands, electrical connectors, and air lines -- that are subject to inspection. Make sure any air line or electrical connections routed through the box remain secure, undamaged, and easily accessible so your truck stays in compliance during roadside or annual inspections.