CAT D Series Skid Steer Door: 1/2 Inch, Extreme Duty

If you run a CAT D3 machine, the CAT D Series skid steer door is the one from our hammer test video. It is 1/2 inch thick Lexan polycarbonate, CNC-cut to fit CAT loaders from the 226 D3 up to the 299 D3 XE L/MGMT, and it sells for $1,595 with the supplied hardware and printed instructions in the box. Mounting requirements vary by exact model. It ships UPS 3 Day Air at a $150 flat rate and carries a limited lifetime warranty.

That is the short answer. Here is the full story, because this door has one.

The Door From the Hammer Test Video

If you have seen the video, you already know this door. Leighton, the owner of Skid Steer Doors of North America, swings a hammer into it on camera. One take, no edits, no cuts. The door takes the hit and stays in one piece.

We made that video because operators kept asking the same fair question: can a clear door really stand up to real work? Talk is cheap. A hammer is not. So instead of writing another paragraph about material science, the man who builds the doors picked up a hammer and filmed it. You can read the whole story behind that video in our hammer test guide.

The point of this page is simple. The door in that video is not a special demo unit. It is the same CAT D Series door we cut and ship every week.

Why This Door Is 1/2 Inch Thick

CAT D3 machines get put on hard jobs. Forestry mulching. Land clearing. Demolition. Brush cutting. Fence lines and snow. All of that work throws debris at the operator, and some of it comes back fast and from close range.

Tempered glass was never built for that kind of strike. Glass is hard but brittle. When it fails, it fails all at once, and you end up with an open cab and glass in your lap. Polycarbonate works differently. It flexes, soaks up the hit, and holds together. That is why the protection is superior to tempered glass, and why the hammer bounced instead of going through.

For the CAT D door we cut that polycarbonate at a full 1/2 inch. That is our extreme duty spec, built for the work D3 machines actually do. This is the original shatterproof polycarbonate Lexan door, from the company that brought it to market first.

Which CAT Machines It Fits

The CAT D Series door is CNC-cut for the D3 lineup:

CNC cutting matters more than most buyers realize. Every door is machine-cut to the exact pattern for your model, so the panel does not need trimming or reshaping. Mounting varies: some models use existing factory points, while others require drilling and bolting, and your kit ships with the instructions for yours.

Run an older CAT? We build a door for the earlier machines too. See the CAT A/B/B3 door page for those models, or start with the full CAT skid steer door guide to see the whole lineup in one place. Not sure which series you have? The model number is on the machine’s data plate, but if you would rather just ask a person, call or text (800) 781-8000 and we will confirm the right door before you order.

What’s in the Box

You get everything needed to put the door on your machine:

• The 1/2 inch Lexan polycarbonate door, CNC-cut for your CAT D3 model
• Door handle with locking latch and keys
• Hinges
• Weather seal gasket
• All nuts, bolts, and washers

Many owners handle the install themselves after reviewing the instructions for their exact machine. Required tools and mounting steps vary; some kits bolt straight on and others require drilling and bolting. If you hit a snag partway through, call or text and a real person will walk you through it.

How It Compares to Your Other Options

When a D3 owner needs a door, there are really three roads: buy from us, order OEM glass through a dealer, or throw a vinyl cover over the opening. Here is the honest comparison.

A vinyl cover keeps some rain off until the wind and the brush get to it. OEM glass is a real door, but you pay dealer prices for a material that can shatter, and then you wait on the parts counter. Our door is built for impact, built for your exact model, and comes straight from the people who make it.

Price and What You Get Back

The CAT D Series door sells for $1,595. Our CAT doors run $1,395 to $1,595, and the D door sits at the top of that range because of the extreme duty build.

Think about what that money buys on a working machine:

• Safety. Protection superior to tempered glass between you and whatever the job throws back at you.
• Comfort. A closed cab helps regulate temperature. That means heat that stays in come January, and dust and wind that stay out all year. More comfortable operators run longer days.
• Value. An enclosed cab lifts resale value right away. When it is time to trade or sell, a machine with a clean, solid enclosure shows better and brings more.

For a machine that earns its keep, the door tends to pay for itself before you ever swing a hammer at it.

Warranty and Shipping, Plain Terms

Every door we build carries a limited lifetime warranty against door failure or breakage: one free replacement for life for the original owner, under normal conditions. Hardware is covered for 3 months. That is the plain version, and it is the real version.

Shipping is UPS 3 Day Air at a $150 flat rate, typically 3 business days (not guaranteed). We ship across the US and Canada. If you are on a deadline before a job starts, call or text (800) 781-8000 and we will give you a straight answer on current lead time.

Add-Ons That Pull Their Weight

Two upgrades make sense for most D3 owners the day the door goes on:

• Electric wiper kit, $229. Designed specifically for our doors, and the kit includes everything needed for the install. If you mulch in the rain or push snow, you want it.
• Cab heater, $119. A compact ceramic heater and fan on a swivel base. It hooks straight to your machine’s battery and turns a closed cab into a warm one.

Add both and your D3 is set up for a full four-season workload, not just the dry months.

The Bottom Line

The CAT D Series skid steer door is the door we let a hammer speak for. Half an inch of Lexan polycarbonate, CNC-cut to your exact D3 model, everything in the box, a limited lifetime warranty behind it, and a flat $150 to get it to your door in about 3 business days. If your CAT still has an open cab, or glass you no longer trust, this is the fix.

Find your door in 30 seconds. Pick your machine’s make and model and see the exact door built for it: [Find Your Door]. Questions? Call or text (800) 781-8000, Mon–Fri 7am–4pm CST.