Excavator Alternators

3979372 JFZ2710F1 24V 70A Alternator for Cummins 6CT8.3 QSL8.9

Q: What numbers are documented for 3979372?

Primary Equipment Part Number: 3979372. Manufacturer Part Number: JFZ2710F1. Published Cummins OE Number: 3972529. Published Cummins OE Number: 4939018. Published Cummins OE Number: 4942002. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 3979372 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.

3979372 JFZ2710F1 24V 70A Alternator for Cummins 6CT8.3 QSL8.9, OEM/reference 3979372, 24V 70A 8-Groove Alternator, product view 1

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5 product photos · Swipe on mobile, or hover and select a thumbnail.

OEM / reference3979372

Specification24V 70A 8-Groove Alternator

Catalog ID53230720

Alternator identified by Cummins reference 3979372 and manufacturer family JFZ2710F1. Exact-number replacement catalogs specify a nominal 24V vehicle system, approximately 28V regulated output, 70A, an eight-groove 60 mm pulley and three mounting points. Published engine applications include Cummins 6CT8.3, ISC, ISL, L8.9 and QSL8.9 families. Five matched product views show one consistent rear cover, terminals, mounting and multi-groove pulley. Confirm 3979372 or JFZ2710F1, 24V/70A, pulley, connector, mounting and Cummins engine serial before ordering.

Product Type: Heavy-equipment alternator
Vehicle Electrical System: 24V
Regulated Output Voltage: Approximately 28V
Rated Current: 70A
Pulley: 8-groove, 60 mm on exact replacement record
Mounting: Three mounting points
B+ Terminal: M6 on exact replacement record
Condition: New replacement alternator

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Part-number relationships

Relationship	Reference family	Number
Primary Equipment Part Number	Cummins alternator reference	3979372
Manufacturer Part Number	Prestolite-family reference	JFZ2710F1
Published Cummins OE Number	Same 24V 70A replacement family	3972529
Published Cummins OE Number	Same 24V 70A replacement family	4939018
Published Cummins OE Number	Same 24V 70A replacement family	4942002

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

3979372

Manufacturer number

JFZ2710F1

Other documented relationship

3972529
4939018
4942002

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

Product summary

24V 70A 8-Groove Alternator

Category: Excavator Alternators
Catalog ID: 53230720
Photo views: 5

Before ordering

Confirm these details

Confirm voltage and rated amperage against the original alternator label.
Compare mounting ears, pulley type and pulley-groove count.
Check plug shape, terminal position and regulator connection.
Verify the engine model and machine serial range before ordering.

Machine fitment

Compatible model references

2 model references

Published Cummins engine families: 6CT8.3 / ISC / ISL / L8.9 / QSL8.9
Fitment limitation: Confirm number, 24V/70A, pulley, connector, mount and engine serial

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 3979372

Which machines use 3979372?

Recorded compatible model references include Published Cummins engine families: 6CT8.3 / ISC / ISL / L8.9 / QSL8.9, Fitment limitation: Confirm number, 24V/70A, pulley, connector, mount and engine serial. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 3979372?

Manufacturer number: JFZ2710F1.

How do I confirm 3979372 before ordering?

Confirm voltage and rated amperage against the original alternator label. Compare mounting ears, pulley type and pulley-groove count. Check plug shape, terminal position and regulator connection. 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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