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Excavator Engine Parts

3957797 Standard Engine Piston Kit for Cummins 4B 6B B5.9

Name: 3957797 Standard Engine Piston Kit for Cummins 4B 6B B5.9
Brand: EexcavaStart
SKU: 3957797

OEM / reference3957797

SpecificationStandard-Bore Engine Piston Kit

Catalog ID64499274

Standard-bore engine piston kit identified by Cummins reference 3957797 for 4B- and 6B-series diesel engines. Catalog records identify piston 3957795, pin 3934047 and retainers 3901706 within this service family. Ring and connecting-rod configuration varies, so confirm the engine serial number and piston crown before ordering.

Fitment status: Verified · Checked 2026-07-28

Product Type: Standard-Bore Engine Piston Kit
Product Brand: EexcavaStart
Size: Standard bore
Condition: New replacement part

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Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.

Part-number relationships

Relationship	Reference family	Number
Primary Part Number	Standard piston service kit	3957797
Kit Component	Piston	3957795
Kit Component	Piston pin	3934047
Kit Component	Pin retainer	3901706

Evidence record

Source: Exact-reference evidence retained for internal audit
Evidence grade: multi-source-supported
Checked: 2026-07-28

Source URLs, catalog files and local evidence paths are stored in the protected product audit record and are not public outbound links.

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

3957797

Other documented relationship

3957795
3934047
3901706

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

Product summary

Standard-Bore Engine Piston Kit

Category: Excavator Engine Parts
Catalog ID: 64499274
Photo views: 5

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 family: Cummins 4B / 6B / B5.9
Fitment limitation: Confirm engine serial, rod style, crown and ring configuration

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 3957797

Which machines use 3957797?

Recorded compatible model references include Engine family: Cummins 4B / 6B / B5.9, Fitment limitation: Confirm engine serial, rod style, crown and ring configuration. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 3957797?

3957797 is the only classified number in the current evidence record. Send the original nameplate for an alternate-number check.

How do I confirm 3957797 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 recovered references from the same system.

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