Excavator Engine Parts

6211-31-2130 Engine Piston for Komatsu S6D140-1

Q: What numbers are documented for 6211-31-2130?

Primary Komatsu Part Number: 6211-31-2130. Formatted Alias: 6211312130. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 6211-31-2130 before ordering?

Match the complete part number, compare the connector or mounting arrangement with the product photos, and confirm the machine or engine model and serial range. Send clear photos of the original unit when requesting a quote.

6211-31-2130 Engine Piston for Komatsu S6D140-1, OEM/reference 6211-31-2130, Cast-Iron Engine Piston, product view 1

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OEM / reference6211-31-2130

SpecificationCast-Iron Engine Piston

Catalog ID51048571

Cast-iron engine piston identified by Komatsu 6211-31-2130 for S6D140-1 and SDA12V140-1 applications. Published data supports a 140 mm bore, 130.2 mm piston length and 52 mm pin diameter. The old page incorrectly added Cummins QST30 numbers 3804710 and 3092720; those unrelated numbers have been removed.

Product Type: Cast-Iron Engine Piston
Product Brand: EexcavaStart
Published Bore: 140.0 mm
Published Piston Length: 130.2 mm
Published Pin Diameter: 52.0 mm
Condition: New replacement part

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Part-number relationships

Relationship	Reference family	Number
Primary Komatsu Part Number	S6D140-1 piston	6211-31-2130
Formatted Alias	Same number without separators	6211312130

Product fitment guide

Part numbers and compatible models

Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.

Part identification

Reference numbers

Primary number

6211-31-2130

Formatting alias

6211312130

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

Cast-Iron Engine Piston

Category: Excavator Engine Parts
Catalog ID: 51048571
Photo views: 6

Before ordering

Confirm these details

Match the complete part number on the original component.
Compare connectors, mounting points and visible dimensions with the product photos.
Confirm the exact machine or engine model and serial range before ordering.

Machine fitment

Compatible model references

2 model references

Engine families: Komatsu S6D140-1 / SDA12V140-1
Fitment limitation: Confirm engine build, crown profile, bore and pin diameter

Compatibility lists identify searchable model families, not every production serial range. Confirm the original part number and machine serial number before purchase.

Quick fitment answers

Common questions about 6211-31-2130

Which machines use 6211-31-2130?

Recorded compatible model references include Engine families: Komatsu S6D140-1 / SDA12V140-1, Fitment limitation: Confirm engine build, crown profile, bore and pin diameter. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 6211-31-2130?

Formatting aliases for the same number: 6211312130.

How do I confirm 6211-31-2130 before ordering?

Match the complete part number on the original component. Compare connectors, mounting points and visible dimensions with the product photos. Confirm the exact machine or engine model and serial range before ordering. Send clear photos of the original unit and connector layout when requesting a quote.

Continue comparing verified references from the same system.

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