Excavator Engine Parts

G3976831 Belt Tensioner for Cummins B ISB QSB Engines

Q: What numbers are documented for G3976831?

Primary Recorded Part Number: G3976831. Manufacturer Part Number: 3976831. Current Replacement Number: 5259022. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm G3976831 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.

G3976831 Belt Tensioner for Cummins B ISB QSB Engines, OEM/reference G3976831, Automatic Belt Tensioner, product view 1

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OEM / referenceG3976831

SpecificationAutomatic Belt Tensioner

Catalog ID61097045

Automatic belt tensioner recorded as G3976831 and manufacturer number 3976831. Exact-number replacement records identify 5259022 as the current replacement and support Cummins 4B3.9, B4.5, 6B5.9, B6.7, ISB and QSB engine families. Confirm the original casting number, pulley grooves, mounting offset and engine CPL.

Product Type: Automatic Belt Tensioner
Product Brand: EexcavaStart
Drive System: Engine accessory belt

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Part-number relationships

Relationship	Reference family	Number
Primary Recorded Part Number	EexcavaStart source-folder number	G3976831
Manufacturer Part Number	Number visible on the photographed casting	3976831
Current Replacement Number	Cataloged replacement for old 3976831	5259022

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

G3976831

Manufacturer number

3976831

Other documented relationship

5259022

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

Product summary

Automatic Belt Tensioner

Category: Excavator Engine Parts
Catalog ID: 61097045
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 family: Cummins 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB
Fitment limitation: Confirm 3976831 or G3976831, engine CPL, pulley grooves and mounting offset

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 G3976831

Which machines use G3976831?

Recorded compatible model references include Engine family: Cummins 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB, Fitment limitation: Confirm 3976831 or G3976831, engine CPL, pulley grooves and mounting offset. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for G3976831?

Manufacturer number: 3976831.

How do I confirm G3976831 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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