Caterpillar K Series Dozer Left Hand Door Glass Replacement | Replaces OEM #281-4141

Caterpillar K Series Dozer Left Hand Door Glass – Replaces OEM #281-4141

This is an aftermarket replacement for Caterpillar OEM glass #281-4141, the left-hand cab door glass on Caterpillar D3K, D4K, D5K and D6K track-type tractors.

The pane is 5mm green-tinted tempered safety glass with a black ceramic frit, about 748mm wide by 1387mm high (29.46" × 54.6"; 55.26" overall length per Caterpillar), with 5 holes.

Fits the following Caterpillar models:

K Series Dozers: D3K XL, D3K LGP, D4K XL, D4K LGP, D5K XL, D5K LGP, D6K, D6K XL, D6K LGP

Product Features

• Glass Type: Tempered safety glass (not polycarbonate)
• Thickness: 5mm (0.2")
• Width: 748mm (29.46")
• Height: 1387mm (54.6"); 1404mm (55.26") overall length
• Tint: Green, with black ceramic frit
• Mounting Holes: 5
• Location: Left-hand cab door
• Condition: New aftermarket replacement glass

Tempered Glass vs. Polycarbonate

This is real tempered glass, the same material type as the factory door glass, not plastic. It resists scratches and keeps its clarity much longer than polycarbonate, and breaks into small, blunt pieces if struck.

Installation Information

This listing is the glass pane only; hinges, pull handle, latch, seals and hardware are not included. Caterpillar's parts store lists the 252-1863 pull handle gasket and the 287-0548 door seal film alongside this glass; neither comes with the pane. The matching 252-1862 pull handle is a surface-mounted handle with M6 threaded brass inserts.

What's Included

• (1) Caterpillar K Series dozer left hand door replacement glass, OEM #281-4141

Not Included: hinges, pull handle, latch, seals or hardware.

Frequently Asked Questions

How do I tell 281-4141 from 281-4140?

281-4141 is the left-hand (LH) door glass and 281-4140 is the right-hand (RH) one. Caterpillar lists both at 1386.80mm tall, and sellers list both at 5mm with 5 holes, so the door side is what decides which one you need.

Will the left door glass fit my Caterpillar PL61 pipelayer?

Caterpillar's parts store and Southeastern Equipment list 281-4141 only for the nine D3K–D6K tractor models, not the PL61. The PL61 appears only on the right-hand 281-4140, so check the number on your glass first.

Does 281-4141 fit a newer D5K2 or D6K2?

Caterpillar's fitment list for 281-4141 names the original K models — D3K XL/LGP, D4K XL/LGP, D5K XL/LGP and D6K, D6K XL, D6K LGP — and no K2 machines. Call us with your serial number if you run a K2.

How dark is the factory tint on this door glass?

Caterpillar lists the door glass as green-tinted with at least 70% light transmittance and a black ceramic frit around the edge.

Can I order polycarbonate windows for a D3K–D5K working in forestry?

Caterpillar's D3K/D4K/D5K spec sheet lists an optional cab with polycarbonate windows and 360-degree guarding, plus optional rear and side cab screens. This listing is the standard tempered glass door pane.

Caterpillar® is a registered trademark of Caterpillar Inc. Forestry Doors is not affiliated with Caterpillar; OEM numbers are listed for cross-reference only.