About this product
260× stronger than the glass it replaces — at half the weight.
SHIELDS® Lexan® polycarbonate, formed to the exact shape of your John Deere door. Drops into the factory opening, reuses your existing hardware, and stays in the frame when something hits it.
✓ Guaranteed exact fit
Formed to OEM shape, milled to OEM thickness. No drilling, shimming or trimming.
✓ 10-year warranty
Against breakage, coating failure, excessive haze and yellowing.
✓ Damaged in transit? Replaced free
Report it within 7 days and the replacement is on us.
Replaces OEM glass: #4684422 (upper) / #4684423 (lower) / #4684428 (LH entry door)
Fits: JD: 85D, 85G | Hitachi: ZAXIS85USB-3, ZAXIS85USB-5N
Sold as: Upper, Lower, LH Entry Door
Available in: 1/4", 3/8", 1/2"
Authorised SHIELDS® dealer. Every panel formed and coated in Indiana.
John Deere 85D & 85G / Hitachi ZX85 Left-Hand Entry Door Glass Replacement
If you're on this page, something already came through your door. The question isn't whether to replace it — it's whether to put the same glass back in and wait for it to happen again.
Factory glass is designed to break safely, not to survive what site work throws at a cab. This is the alternative. Same shape as your John Deere glass, same opening, same hardware, roughly 260 times the impact strength — and for most owners it's the last one they buy for that machine.
Will This John Deere Excavator Door Fit Your Machine?
1. Start with the glass number — this is the check that settles it. Look at the corner of your original panel for #4684422 (upper) / #4684423 (lower) / #4684428 (LH entry door). If it matches, you're on the right page whatever the decal says.
2. Note the fitment detail below before you order.
Have these to hand before you order. The options above ask for glass number, how does your glass/poly install, what are you replacing? glass or existing polycarbonate. They are all on the machine, and answering them accurately is what gets the right panel to your door first time.
Before you order — fitment note
All three flat. Verify glass numbers
Compatible John Deere Models
Every machine below takes this panel. Find yours, then confirm against the glass number.
John Deere Door Thickness Guide — Which Should You Buy?
This is the real decision on this page, and it's about what the machine does — not how careful the operator is.
1/4"General duty Matches your OEM glass exactly. Fine for trenching, utility work and general site duty. It won't shatter the way glass does, but it isn't an impact panel. 3/8"
Mid-weight A real step up in impact resistance. Clearing work, grapple work, anything with debris in the air. 1/2"
WE RECOMMEND Our recommendation. Demolition, hammer work and shear work — this is the grade that survives the kind of strike that broke the last one.
Not sure between two? Take the thicker. The price difference is small next to a day with the machine parked, and going up a grade costs nothing in fitment — a 1/2" panel seats in the opening exactly like a 1/4" one.
"Won't a thicker panel scratch?" It's the fair objection, and it's why we post-apply SUPERCOAT™ to both faces after forming rather than co-extruding it. Take steel wool to the surface and it wipes clean.
SHIELDS® Lexan Polycarbonate vs John Deere Factory Glass
SHIELDS® SUPERCOATED™ John Deere factory glass Impact strength Around 260× stronger Baseline Weight About half Baseline How it fails Flexes, takes the hit, stays in the opening Shatters, all at once, into the cab Wipers Yes — SUPERCOAT™ both faces Yes Fitment Drops into the factory opening Drops into the factory opening Warranty 10 years against manufacturing defects Varies by dealerInstalling Your John Deere Door
This is a glue-in cab, the same as it left the factory. No frame to unbolt, no gasket to seat — the panel bonds directly to the cab. Every panel ships prepped for it, edges and holes already machined, with a care sheet in the box.
You need the right adhesive — and it isn't the one at your local supplier
Standard urethane will not bond to a SUPERCOATED™ surface. It only bonds to bare polycarbonate, and on a coated panel it lets go. RTV silicone is weatherproofing only — it cannot bond the panel to the cab.
Using any other adhesive voids all warranty claims.
SHIELDS® Caulk is tested on these etched and milled panels. Tick the box on this page and it ships in the same carton at no extra freight — order it afterwards and you're waiting on a second delivery with the machine already down.
Install & care sheet: Download the SHIELDS® Installation, Care & Maintenance sheet (PDF) — worth reading before you start.
Install video: ##VIDEO_EMBED##
John Deere Door Warranty, Returns and Delivery
Ten-year warranty against manufacturing defects — breakage, coating failure, excessive haze and excessive yellowing. Scratching from use isn't covered, and nobody should tell you otherwise.
Returns. If the panel arrives defective, or we send the wrong part, we put it right at our cost. If you simply change your mind, the panel can be returned subject to a 25% restocking fee. That's the whole policy — no small print.
Open the carton before the driver leaves. Look the panel over, and if anything is damaged, write it on the carrier receipt before you sign. Photograph the packaging and the panel and send us the photos within 7 days — inside that window we replace it at our cost, no argument. Past it, the carrier won't accept the claim.
John Deere 85D & 85G / Hitachi ZX85 Left-Hand Entry Door — Questions
Which number should I be checking on my glass?
The number stamped in the corner of your original panel. This listing replaces #4684422 (upper) / #4684423 (lower) / #4684428 (LH entry door). Manufacturers reuse cab designs across model years and series, so the number is more reliable than the badge on the machine.
Do I need one panel or more than one?
They are ordered separately — this listing covers upper, lower, lh entry door. Check which one broke before ordering, and if more than one went, place an order for each.
Can I fit this myself, or does it need a shop?
Most owners do it themselves. It's a glue-in, so there's no frame to unbolt — clean the opening, lay the adhesive, position the panel, clamp it and let it cure. A second pair of hands makes lining it up easier.
How long before I can run the machine again?
Cure time is set by the adhesive, not the panel — follow the time printed on the tube and leave it clamped. Rushing the bond is the single thing most likely to turn a good install into a leak.
What happens if I use regular windshield urethane?
It won't hold. Standard urethane bonds to bare polycarbonate, not to a SUPERCOAT™ surface, so on a coated panel it lets go. It also voids the warranty.
Will a 1/2" panel still fit my cab?
Yes. We mill the perimeter back to OEM glass thickness, so the thicker panel seats in the opening exactly as the original did.
How do I clean a Lexan polycarbonate windshield?
Mild soap and water with a soft cloth, then dry it off. Avoid abrasive cleaners, squeegees and power washers — those mar the coating, and coating damage from the wrong cleaner isn't a warranty claim. The care sheet lists approved products.
Will it fog or go yellow?
Yellowing is slow and UV-driven, which is why the warranty names excessive yellowing specifically. For fogging, treat it as you would glass — keep the cab vented and the panel clean.
Ready to order?
Confirm your glass number, answer the options above and pick your thickness — then add it to the cart. Backed by a 10-year warranty and free replacement for freight damage.
Description supplied by eSkidSteer through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.
