20Y5311451, 20Y-53-11451 GLASS KOMATSU

Durable Lower Door Glass for Komatsu PC-8 Series Excavators

The 20Y5311451, 20Y-53-11451 GLASS KOMATSU is a lower door window used on a wide range of Komatsu PC-8 series excavators. Public parts and replacement-glass sources consistently identify this part as an excavator door lower window or lower door glass, and the available specifications repeatedly describe it as green-tinted, tempered glass with a thickness of 5 mm. Sources also place it across several Komatsu PC-8 excavator families, making it an important cab component for buyers who need exact-fit visibility and dependable cab protection.

For heavy equipment owners, this part is more than a simple pane of glass. A lower door window directly affects operator visibility, cab enclosure integrity, dust protection, and overall machine presentation. When the original panel is cracked, scratched, or missing, the excavator loses part of the visibility and weather protection that operators depend on every day. That is why buyers searching for 20Y5311451 or 20Y-53-11451 are usually looking for a direct replacement that restores the cab correctly, not a generic piece of flat glass. The product image you shared also matches this application, showing a shaped lower cab glass panel with a black ceramic border and tinted field typical of Komatsu excavator door glass.

At 3GEN Export, we supply 20Y5311451, 20Y-53-11451 GLASS KOMATSU as an OEM supplier solution for global heavy machinery buyers. We deliver all over the world in 5 working days, helping workshops, fleet owners, resellers, and contractors reduce downtime when cab glass needs urgent replacement.

What Is 20Y5311451, 20Y-53-11451 GLASS KOMATSU?

The clearest public identification for this part is lower door glass for Komatsu excavators. Safe Harbor Parts lists 20Y-53-11451 as an “Excavator Door Lower Window,” while YearnParts describes it as “Door Lower Glass 20Y-53-11451” for several Komatsu excavator models. Those descriptions are important because they define both the part type and its position in the cab layout. This is not the front windshield, not the rear window, and not the upper door glass. It is the lower door glass panel used in the excavator cab door assembly.

A parts-catalog snippet for Komatsu PC350LC-8 also lists 20Y-53-11451 simply as “GLASS” inside the cab door section, with related components such as the matching seal, weather strip, hinge, and trim listed around it. That surrounding context strongly supports the identification of this part as a door-mounted cab glass panel rather than a general body panel insert.

From a practical e-commerce perspective, that matters because buyers search with a clear purpose. Some will type 20Y5311451 without dashes. Others will search 20Y-53-11451 exactly as shown in a parts book. Others will look for phrases like Komatsu lower door glass, Komatsu excavator cab door window, or PC200-8 lower door glass. A strong product page should support all of those search habits naturally.

Why This Komatsu Door Glass Matters

Cab glass is often underestimated until it breaks. On an excavator, the cab is the operator’s working environment, and visibility is a key part of both safety and productivity. The lower door glass plays an especially useful role in providing a clearer field of view around the machine, particularly closer to the ground and alongside the cab. In tight working conditions, that extra visibility matters. This is a practical inference based on the documented lower-door position of the glass.

Public supplier sources consistently describe 20Y-53-11451 as tempered and green tinted. Tempered construction is standard for heavy equipment cab glass because it is better suited to harsh operating environments than untreated glass, while the green tint helps manage glare and supports a more comfortable cab environment in outdoor conditions. Safe Harbor also notes that the glass is DOT certified and supplied as glass only, without frame, hardware, or seal.

In real machine use, replacing damaged lower door glass helps restore:

Better operator visibility

Clear glass improves the operator’s ability to monitor nearby ground conditions, machine position, and surrounding work areas. This is an inference from the part’s role as a lower door window.

Cab enclosure protection

A correct lower door panel helps keep out wind, dust, and weather, making the operator compartment more usable on active jobsites.

A cleaner, more professional machine appearance

Damaged or missing door glass affects both resale presentation and day-to-day operator confidence. Replacing the correct panel helps return the excavator to a more complete and professional condition.

Technical Details of 20Y5311451, 20Y-53-11451 GLASS KOMATSU

Publicly available seller and catalog references provide a clear technical profile for this part.

Part number formats

20Y5311451

20Y-53-11451

Product type

Lower door glass

Excavator door lower window

Cab door glass panel

Material and finish

Tempered safety glass

Green tinted

DOT certified on replacement-glass listings

Approximate dimensions

There is some variation in public listings. Safe Harbor lists the glass at 5 mm thick, 615 mm wide, and 840 mm high. YearnParts lists the same part at 620 mm height and 855 mm width. Those differences likely reflect how sellers measure shaped cab glass panels, but both sources agree that this is a 5 mm tempered lower door glass in the same general size class.

Weight in KG

Multiple catalog-style and parts-market snippets list the weight of 20Y-53-11451 as 5.66 kg. This appears in more than one source and is the strongest usable weight figure I found for the part.

Supply format

Glass only

Does not include frame, hardware, or seal on replacement-glass listings

Compatible KOMATSU Models for 20Y5311451, 20Y-53-11451 GLASS KOMATSU

Compatibility for this part is well represented across public sources, though the model lists are not perfectly identical. The safest approach is to use the overlapping fitment pattern and remind buyers to confirm by part number and serial number.

Safe Harbor lists the part for these Komatsu models: PC130-8, PC210-8K, PC210LC-8K, PC240LC-8K, PC200-8, PC220-8, PC270-8, PC200LC-8, PC220LC-8, PC300LC-8, PC350LC-8, PC400-8, PC400LC-8, and PC450LC-8.

YearnParts lists it for PC200-8, PC220-8, PC270-8, PC300-8, PC350-8, PC400-8, PC450-8, and PC550LC-8.

An excavator cab glass catalog PDF associates 20Y-53-11451 with Komatsu Dash 8 series machines including PC160LC-8, PC200-8/LC-8, PC210-8/LC-8, PC220-8/LC-8, PC240-8/LC-8, PC270-8, PC290-8/LC-8, PC300-8/LC-8, PC350-8/LC-8, PC400-8/LC-8, and PC450-8/LC-8.

Commonly referenced Komatsu models

PC130-8

PC160LC-8

PC200-8

PC200LC-8

PC210-8

PC210LC-8

PC210-8K

PC210LC-8K

PC220-8

PC220LC-8

PC240-8

PC240LC-8

PC240LC-8K

PC270-8

PC290-8

PC290LC-8

PC300-8

PC300LC-8

PC350-8

PC350LC-8

PC400-8

PC400LC-8

PC450-8

PC450LC-8

PC550LC-8

Important fitment note

Final fitment should always be confirmed by exact part number, machine model, and serial number before order. Public sources agree strongly on the Dash-8 excavator family, but individual seller lists vary slightly, which is common with cab glass parts sold across multiple regions and serial ranges.

Product Design and Practical Benefits

The shape of this glass is one of its most important features. Lower door glass cannot be treated like a flat universal rectangle. It must match the cab opening, edge contour, mounting geometry, and seal position of the Komatsu door assembly. The image you provided shows that machine-specific profile clearly, with a curved upper-right section, a straight main side, and the characteristic shaped lower edge used to fit the excavator door design.

That model-specific shape provides several real benefits.

Correct fit in the cab door area

Because this is a shaped lower door panel, using the correct part number helps avoid installation issues that come with generic or mis-sized glass.

Better durability for equipment use

Tempered construction and heavy-equipment-specific shaping make the glass more suitable for excavator service than ordinary window glass. Public replacement-glass sources consistently describe this part as tempered.

Improved operator environment

The green tint and full lower-door coverage help support a more comfortable and protected cab environment, especially in bright outdoor conditions.

Typical Reasons Buyers Replace 20Y5311451, 20Y-53-11451 GLASS KOMATSU

Most buyers search for this part because of real field conditions, not because of routine browsing.

A common reason is breakage caused by impact from debris, tools, site material, or accidental contact during machine operation or transport.

Another reason is scratching, delamination, or visual wear that reduces visibility and makes the machine look poorly maintained.

Fleet refurbishment is also common. Used excavators being prepared for resale, export, or long-term service often need cab glass replacement to improve both function and presentation.

Workshops and parts dealers also source this part because door glass on excavators is a recurring replacement item, especially on high-use machines.

Why 3GEN Export for 20Y5311451, 20Y-53-11451 GLASS KOMATSU

At 3GEN Export, we understand that even a glass panel can create serious downtime when the machine cannot be used comfortably or safely. That is why we supply 20Y5311451, 20Y-53-11451 GLASS KOMATSU as an OEM supplier solution for professional heavy machinery buyers.

We deliver all over the world in 5 working days, which is especially important for contractors, workshops, and resellers trying to return machines to service quickly.

Our focus on heavy machinery spare parts also matters here. Buyers are not simply ordering decorative glass. They are sourcing a Komatsu excavator cab component that must match the correct machine family and fit the working cab structure properly.

SEO Strategy for This Product Page

To keep the content optimized without pushing the keyword density too high, the page should combine the main keyword with natural supporting variations such as:

20Y5311451

20Y-53-11451

Komatsu lower door glass

Komatsu excavator door lower window

Komatsu cab door glass

PC200-8 lower door glass

PC220-8 cab door window

Komatsu Dash 8 excavator glass

This creates stronger coverage for Google and Search GPT while keeping the text readable for human buyers.

Final Summary

The 20Y5311451, 20Y-53-11451 GLASS KOMATSU is a lower door glass panel for Komatsu PC-8 series excavators. Public sources consistently identify it as an excavator door lower window made from 5 mm tempered, green-tinted glass, with seller measurements around 615 x 840 mm or 620 x 855 mm depending on how the shaped panel is measured. Multiple parts-market and catalog-style sources also support a weight of 5.66 kg, and the part is widely linked with Dash-8 excavator models including PC200-8, PC220-8, PC270-8, PC300-8, PC350-8, PC400-8, and related LC variants.

For your website, this part should be positioned as a model-specific Komatsu lower door glass that restores visibility, cab protection, and professional machine presentation. At 3GEN Export, we supply this product as an OEM supplier and deliver all over the world in 5 working days.

Weight in KG

5.66 kg

Manufactured in Turkey, these products are made using the latest technologies and built to meet the highest international standards. Each machine is a high-quality copy of the original, ensuring durability, precision, and performance that you can rely on for modern construction and metalworking projects.