DK4870012700, DK487001-2700 CYLINDER KOMATSU

The DK4870012700, DK487001-2700 CYLINDER KOMATSU is a compressor-side cylinder component used in Komatsu 6D125 engine families. Public parts references consistently place this part inside the air compressor inner-parts group, where it works with the compressor head, piston, connecting rod, and related sealing items. Those listings also associate the part with 6D125, 6D125E, S6D125, and S6D125E engine families, which makes it clear that this is not a random sleeve or spacer but a functional compressor cylinder body within a defined Komatsu engine accessory assembly.

From the uploaded images, the part has the expected shape of a compact compressor cylinder housing: a thick cylindrical body, machined inner bore, square mounting flanges on both ends, and multiple bolt holes for secure fastening. The inner wall finish appears precision-machined for piston travel, while the outer cast body is designed for rigidity and service durability. Visually and catalog-wise, the DK4870012700, DK487001-2700 CYLINDER KOMATSU belongs to the engine-mounted air compressor system rather than to the transmission, axle, or final drive.

At 3GEN Export, we supply the DK4870012700, DK487001-2700 CYLINDER KOMATSU as an OEM-quality replacement solution for buyers who need dependable fit, export support, and worldwide delivery in 5 working days.

What the DK487001-2700 CYLINDER KOMATSU Does

The clearest public evidence for function comes from compressor parts diagrams. In those diagrams, DK487001-2700 appears directly in the air compressor inner-parts section, together with connecting rod, piston, O-ring, and cylinder-head-related items. That placement shows that the DK4870012700, DK487001-2700 CYLINDER KOMATSU forms the working cylinder chamber for the compressor mechanism mounted on Komatsu 6D125-series engines.

In practical terms, this means the component provides the precision bore in which the compressor piston operates. It helps contain compression, guide movement, support sealing, and maintain the internal geometry required for stable air compressor performance. If this bore wears, scores, distorts, or corrodes, the compressor can lose efficiency, develop blow-by, suffer poor sealing, or create abnormal noise and heat. Because of that, the DK4870012700, DK487001-2700 CYLINDER KOMATSU is not just a mounting shell. It is one of the core hard parts that determines how well the compressor can build and maintain pressure.

Some commercial cross-reference listings describe this same part as a cylinder liner for the Komatsu 6151-81-3112 air compressor, which aligns with the public compressor diagrams that place it inside the same compressor assembly family. Even when different sellers use slightly different naming conventions such as cylinder or cylinder liner, the web evidence points to the same operating role: a bore-forming compressor cylinder part for the Komatsu air compressor assembly.

Visual Analysis of the Uploaded Part

The uploaded photos show a short, heavy, tubular component with a machined inner surface and flat bolting faces on both ends. This geometry is exactly what mechanics expect from a compressor cylinder body. The outer black-coated casting gives the part structural strength, while the silver machined lip and inner bore indicate the surfaces that matter for installation accuracy and piston operation.

The front flange has four evenly spaced fastener holes, and the rear face mirrors the same general mounting logic. That layout strongly suggests the part clamps between mating compressor components, likely between the crankcase side and the cylinder-head side of the air compressor unit. The wall thickness also indicates that the DK4870012700, DK487001-2700 CYLINDER KOMATSU is designed to handle mechanical stress, heat cycling, and the repetitive pressure-loading environment common in engine-mounted compressor systems. These visual clues fit well with the public catalog placement in the air compressor 3GENEXPORT.

Another important detail is the smoothness of the internal bore. A component used only as a spacer would not need this kind of internal finishing. The machined inner wall supports the interpretation that the piston runs directly inside this body or interfaces extremely closely with it. That is why dimensional accuracy matters so much for this part.

Engine and Compressor Context

Public Komatsu parts sources connect DK487001-2700 to the 6D125 engine family and related compressor assemblies. One source explicitly ties it to engines including 6D125, 6D125E, S6D125, and S6D125E. Other references show it in the air compressor 3GEN section of S6D125-1B8, S6D125-1C, S6D125-1R, and 6D125-1AB serial-based listings. Taken together, that evidence shows the DK4870012700, DK487001-2700 CYLINDER KOMATSU belongs to a broad 6D125-series compressor platform rather than to one isolated engine serial alone.

A further supporting clue comes from the compressor assembly reference for 6151-81-3112, where DK487001-2700 appears in the item list. That tells buyers that the part is associated with the compressor unit itself, not only with the general engine family. For maintenance planning, this is valuable because many workshops identify compressor parts by the compressor assembly number before checking the internal component number.

Compatible Komatsu Models and Engine Applications

Because the public references for DK487001-2700 are mostly engine-and-compressor based rather than clean machine-model catalogs, the safest compatibility statement is this: the part is publicly associated with Komatsu machines that use compatible 6D125-series engines and the matching air compressor inner-parts arrangement. Web references specifically support these engine applications:

Confirmed public engine-family matches

• 6D125
• 6D125E
• S6D125
• S6D125E
• SA6D125E
• SA6D125E variants in broader 6D125-related listings

Public serial-based compressor references

• 6D125-1AB S/N 10276-UP
• 6D125-1Z S/N 19761-UP
• S6D125-1B8 S/N 22230-UP
• S6D125-1C S/N 10001-UP
• S6D125-1R S/N 16790-UP
• S6D125-1JJ in commercial listing context

Machine-side guidance

Since 6D125 and S6D125 engines were used across multiple Komatsu machine families, including graders and other heavy equipment, the exact machine model should always be confirmed by engine model, serial number, and compressor arrangement before ordering. Public material supports the engine family clearly, but not a single complete machine-model list tied only to DK487001-2700 across every market. That is why serial verification is the most reliable buying method for this part.

Technical Details and Specifications

Public catalog-style references give the weight of DK487001-2700 as 2.03 kg. Multiple sources repeat this figure, making it the strongest available published weight reference for the part.

Based on the web references and the uploaded product images, the practical specification profile for the DK4870012700, DK487001-2700 CYLINDER KOMATSU is:

Key technical profile

• Part number: DK4870012700 / DK487001-2700
• Part name used in public references: Cylinder
• Commercial cross-reference naming: Cylinder liner in some listings
• Main assembly area: Air compressor inner parts
• Engine family association: 6D125 / 6D125E / S6D125 / S6D125E and related variants
• Published weight: approximately 2.03 kg
• Likely function: compressor piston running bore / cylinder body within the compressor assembly

From a workshop perspective, the most important characteristics are the bore quality, flange flatness, bolt-hole accuracy, and correct fit with the head, piston, and connecting rod arrangement. Since the part sits inside a compressor mechanism, even minor deviations in bore geometry can affect compressor sealing and pressure stability.

Why This Part Matters in Service

A compressor cylinder may look simple from the outside, but it directly influences how the compressor performs. If the bore is worn or damaged, the piston cannot seal properly. That can reduce air output, raise operating temperature, and shorten the life of related parts such as piston rings, head components, and valves.

In heavy machinery, poor compressor performance can create secondary problems. Systems that depend on steady air pressure or reliable compressor operation become less consistent, and maintenance teams often waste time replacing surrounding components before identifying the cylinder itself as the real worn part. That is why the DK4870012700, DK487001-2700 CYLINDER KOMATSU should be treated as a precision service part, not as a generic tube-shaped casting. Its condition affects efficiency, durability, and rebuild quality.

Installation and Inspection Advice

Before installing the DK4870012700, DK487001-2700 CYLINDER KOMATSU, technicians should check the compressor piston, connecting rod, head surface, and seal-related items in the same assembly. The public diagrams show this part working closely with those neighboring items, so replacing only one worn component without checking the others can shorten service life.

The bore should be visually inspected for scoring, glazing, corrosion marks, or taper. The mounting faces should also be checked for warping, burrs, and thread damage. During assembly, clean mating surfaces and correct torque practices matter because poor clamping can affect sealing and alignment. On compressor repairs, these small details often decide whether the rebuilt unit runs quietly and efficiently or returns early with repeat issues.

Why Buyers Choose 3GEN Export

At 3GEN Export, we understand that buyers searching for the DK4870012700, DK487001-2700 CYLINDER KOMATSU usually need a dependable compressor repair solution, not just a catalog match. They need the right part number, solid dimensional quality, and support for international supply.

That is why we offer the DK4870012700, DK487001-2700 CYLINDER KOMATSU as an OEM-supply option backed by global export service. We help customers confirm compatibility by part number, engine family, and serial context, and we deliver worldwide in 5 working days.

Final Evaluation

The DK4870012700, DK487001-2700 CYLINDER KOMATSU is a compressor cylinder component used in Komatsu 6D125-series engine applications. Public sources place it in the air compressor 3GEN section and connect it with engine families including 6D125, 6D125E, S6D125, and S6D125E. Several serial-based listings also show it in compressor assemblies for 6D125-1AB, 6D125-1Z, S6D125-1B8, S6D125-1C, and S6D125-1R configurations.

From both the catalog evidence and the uploaded images, this part is best understood as a precision-machined compressor cylinder body that provides the working bore for the piston inside the Komatsu air compressor assembly. It is a critical fit-and-function component, and its published weight is approximately 2.03 kg.

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