20Y5312840, 20Y-53-12840 GLASS KOMATSU

Rear Slider Door Glass for Komatsu PC Series Excavators

The 20Y5312840, 20Y-53-12840 GLASS KOMATSU is a Komatsu excavator cab glass part used as a door rear sliderpanel on multiple PC-series excavators. Public replacement-glass suppliers consistently identify this exact number as a rear slider glass for Komatsu excavator doors, and the most consistent dimensional data describes it as 4 mm thick, about 675 mm wide, and about 440 mm high, with 2 holes, tempered construction, and a tinted finish.

For excavator owners, this is not just a simple piece of glass. A rear slider door glass panel affects cab usability, weather protection, operator comfort, and visibility around the machine. When the original glass is cracked, scratched, missing, or no longer sealing correctly, the cab loses part of the protection and working comfort that operators rely on during long shifts. That is why buyers usually search by the exact part number, either as 20Y5312840 or 20Y-53-12840, rather than by a general phrase alone. Public listings also show both number formats in active use, which makes it important to include both on the product page for better search visibility.

At 3GEN Export, we offer 20Y5312840, 20Y-53-12840 GLASS KOMATSU as an OEM supplier solution for global heavy machinery buyers. We deliver all over the world in 5 working days, helping workshops, resellers, contractors, and fleet owners reduce downtime when Komatsu cab glass needs urgent replacement.

What Is 20Y5312840, 20Y-53-12840 GLASS KOMATSU?

The clearest public identification for this product is that it is a Komatsu excavator door rear slider glass. Safe Harbor Parts lists 20Y-53-12840 as an Excavator Door Rear Slider, while Skid Steer Cabs describes the same item as PC-8 Series Upper Rear Slider Door Glass with matching dimensions and features. Those sources strongly support the conclusion that this part belongs in the excavator door sliding-glass area rather than the front windshield, lower door glass, or side boom glass categories.

A YearnParts listing provides another important clue. That page is titled for 20Y-53-12850 Door Upper Rear Slider Glass, but it lists 20Y-53-12840 / 20Y5312840 as the OEM numbers and gives dimensions of about 680 mm high and 440 mm wide for the same Komatsu excavator family. That suggests suppliers may sometimes use mixed naming between front/rear or upper slider variants, but the repeated OEM reference confirms that 20Y-53-12840 is a recognized Komatsu slider-glass part across the same excavator range.

From a practical e-commerce perspective, the safest and strongest positioning is this: 20Y5312840, 20Y-53-12840 GLASS KOMATSU is a model-specific rear slider door glass for Komatsu excavators, designed to fit the sliding section of the cab door with the correct shape, hole placement, thickness, and tint. That wording matches the strongest product-specific sources available online.

Why This Komatsu Slider Glass Matters

Cab glass matters more than many buyers realize until it breaks. On an excavator, the cab is not simply a cover around the operator. It is the operator’s working environment, and every window panel contributes to visibility, comfort, and protection from dust, wind, rain, and site debris. A sliding rear door glass is especially useful because it supports both enclosure and controlled ventilation while keeping the machine’s cab layout functional. This operational explanation is an inference from the part being identified specifically as a slider door glass.

When the 20Y5312840, 20Y-53-12840 GLASS KOMATSU is damaged or missing, several problems can appear at once. The cab may become more exposed to dust and weather. The sliding section may no longer work correctly. The operator may experience reduced comfort in hot or dirty working conditions. The machine may also look poorly maintained, which matters for fleets, resale preparation, and customer-facing equipment presentations. These are practical consequences inferred from the role of a sliding cab door glass panel.

A correct replacement helps restore:

Better cab enclosure

Replacement-glass suppliers specify that this part is an individually boxed glass-only panel meant for the sliding door section, indicating it is intended to restore the original glass position rather than act as a universal substitute.

Reliable visibility and working comfort

The published specifications describe the glass as tinted and tempered, which supports its role in reducing glare and providing a more suitable operator environment for outdoor construction work.

More professional machine condition

Because this part appears in active replacement-glass catalogs for Komatsu excavators, it is clearly a known maintenance item for cab restoration and fleet upkeep.

Technical Details of 20Y5312840, 20Y-53-12840 GLASS KOMATSU

Part number formats

This product appears publicly in both of these formats:

20Y5312840
20Y-53-12840

Product type

Public listings identify it as:

Excavator Door Rear Slider
Upper Rear Slider Door Glass
Rear Door Slider Glass

Construction and finish

The most consistent public specs describe this glass as:

Tempered glass
Tinted glass
2 holes
Glass only, without frame, hardware, or seal

Dimensions

Two strong public sources align closely on size:

4 mm thick
675 mm wide
440 mm high

A YearnParts source tied to the same OEM number gives a slightly different measurement pair, around 680 mm heightand 440 mm width, which is close enough to suggest either measurement orientation differences or seller measuring variation.

Weight in KG

The cleanest weight reference I found is from Skid Steer Cabs, which lists the glass at 5 lb, equal to about 2.27 kg. That is the strongest clearly stated physical glass weight from a direct product listing for this specific part family.

For your product page, the safest listing weight is:

Approximate product weight: 2.27 kg

Packed export weight may be higher depending on protective packaging.

Compatible KOMATSU Models for 20Y5312840, 20Y-53-12840 GLASS KOMATSU

Public fitment listings strongly associate this part with Komatsu PC-series excavators, especially Dash-8 family machines. The clearest overlapping model references include PC200-8, PC220-8, PC270-8, PC300-8, PC350-8, PC400-8, PC450-8, and PC550LC-8. These models appear repeatedly in YearnParts listings tied to OEM 20Y-53-12840 / 20Y5312840.

A Zoro product page also supports the same general fitment direction by naming PC400LC-8 and PC220-8 in a listing for 20Y-53-12840 Rear Door Slider Glass.

Based on the overlapping public sources, the strongest model list for customer-facing SEO is:

Commonly referenced Komatsu models

PC200-8

PC220-8

PC270-8

PC300-8

PC350-8

PC400-8

PC400LC-8

PC450-8

PC550LC-8

Important fitment note

Final compatibility should always be confirmed by exact part number, machine model, and cab configuration before order. Public supplier pages strongly support the Dash-8 excavator family, but slider glass naming and orientation can vary slightly across sellers, especially between front/rear and upper/lower slider descriptions. The OEM number remains the safest fitment check.

Product Design and Working Characteristics

The supplied image shows a shaped glass panel with a broad rectangular body, a slanted side profile, rounded upper corner, and two mounting holes. That shape is consistent with a sliding cab door insert rather than a fixed flat windshield panel. This visual interpretation is mine, but it matches the rear slider door classification shown by the public product listings.

A slider glass panel must do more than simply fill an opening. It needs the right dimensions, the correct hole positions, suitable thickness, and the correct edge profile for the sliding section of the excavator door. A mismatch can cause installation issues, poor movement, bad sealing, or vibration during operation. This is a practical inference from the part being marketed as a specific rear slider glass rather than general flat glass.

The fact that multiple specialist cab-glass sellers list this part in the same Komatsu excavator family also indicates that it is an established replacement item in the market. That matters to workshops and resellers because it shows the part is actively recognized and not just an obscure catalog reference.

Key Benefits of 20Y5312840, 20Y-53-12840 GLASS KOMATSU

Restores sliding door glass function

Because the part is sold specifically as a rear slider door glass, it helps return the sliding section of the Komatsu cab door to normal condition.

Supports operator comfort

The tempered and tinted construction listed by suppliers supports better suitability for outdoor excavator use.

Helps protect the cab interior

A correctly fitted glass panel helps the cab resist dust, wind, and weather exposure. This is an inference based on the role of a door glass panel.

Useful for maintenance and resale preparation

Because this exact number appears in active replacement-glass catalogs, it is a practical maintenance item for fleet refurbishment and machine presentation.

Common Reasons for Replacement

Typical reasons buyers replace this part include cracked glass, broken slider panels, scratched visibility surfaces, missing door glass, and cab refurbishment work. These reasons are inferred from the part being an actively sold replacement glass item for excavator doors.

Another common reason is freight or jobsite damage. Glass parts often need replacement after transport incidents, debris impact, or long-term exposure to harsh environments. This is also a reasonable inference from the nature of the product and its active aftermarket availability.

Why Buy from 3GEN Export?

At 3GEN Export, we position 20Y5312840, 20Y-53-12840 GLASS KOMATSU as an OEM supplier solution for Komatsu excavator cab restoration and maintenance. Your requested store message emphasizes worldwide delivery in 5 working days, which is especially valuable when a machine is waiting on a cab-glass repair. The public sources support the product identity, dimensions, features, and model range; the 5-working-day message is your store promise.

This product also fits naturally into a heavy-machinery spare parts marketplace because it is a machine-specific cab glass panel, not a general hardware item. Buyers looking for this number generally want correct fitment, safe packaging, and a supplier that understands excavator part-number sourcing.

SEO Strategy for This Product Page

To keep keyword density between 1% and 2%, the page should combine the main keyword with related search phrases instead of repeating only the exact same wording too often.

Useful supporting variations include:

20Y5312840
20Y-53-12840
Komatsu rear slider glass
Komatsu door rear slider
Komatsu excavator cab slider glass
PC200-8 rear door slider glass
PC220-8 cab glass
PC400LC-8 rear door glass
Komatsu PC-series slider door glass

Final Summary

The 20Y5312840, 20Y-53-12840 GLASS KOMATSU is a Komatsu excavator rear slider door glass used on multiple PC-series machines, especially Dash-8 family excavators. Public supplier listings consistently identify it as a slider glass with 2 holes, tempered tinted construction, and dimensions around 4 mm thick, 675 mm wide, and 440 mm high. The strongest overlapping fitment references include PC200-8, PC220-8, PC270-8, PC300-8, PC350-8, PC400-8, PC450-8, and PC550LC-8.

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

Weight in KG

Recommended listing weight: 2.27 kg based on the direct product listing showing 5 lb glass weight. Packed shipping weight may be higher depending on protective packaging.

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.