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Excavator Alternators

3975140 3646916 24V 140A Brushless Alternator Family

OEM / reference3975140

SpecificationHeavy-Duty Brushless Alternator

Catalog ID50560337

Heavy-Duty Brushless Alternator identified by primary reference 3975140. The official catalog supports a 24V 140A brushless J180-long alternator family. Exact photo identity is unresolved because the current gallery shows a pulley while the cited BLD configurations are supplied without a pulley. Confirm the complete part number, electrical rating, mounting, terminals and original product before ordering.

Fitment status: Pending · Checked 2026-07-27

Product Type: Heavy-Duty Brushless Alternator
Product Brand: EexcavaStart
Voltage: 24V
Output Current: 140A
Mount Type: J180 long mount
Rotation: Clockwise
Pulley: Configuration requires verification
Condition: New replacement part

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Part-number relationships

Relationship	Reference family	Number
Primary Part Number	Current catalog identity	3975140
Manufacturer Part Number	Official Prestolite catalog	BLD3314GH
Direct Replacement Number	Official Prestolite catalog	3646916
Direct Replacement Number	Official Prestolite catalog	BLD3368GH
Related Configuration - Not Direct Interchange	Separate official Prestolite variant	4372403
Related Configuration - Not Direct Interchange	Separate official Prestolite variant	BLD3387GH

Evidence record

Source: Exact-reference evidence retained for internal audit
Evidence grade: manufacturer-supported-image-conflict-pending
Checked: 2026-07-27

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

3975140

Manufacturer number

BLD3314GH

Direct interchange

3646916
BLD3368GH
4372403
BLD3387GH

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

Product summary

Heavy-Duty Brushless Alternator

Category: Excavator Alternators
Catalog ID: 50560337
Photo views: 0

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

Catalog application families: Cummins, Komatsu and MTU installations using the cited Prestolite configurations
Fitment limitation: Verify the exact Prestolite model, pulley configuration, mounting and terminals before quotation

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 3975140

Which machines use 3975140?

Recorded compatible model references include Catalog application families: Cummins, Komatsu and MTU installations using the cited Prestolite configurations, Fitment limitation: Verify the exact Prestolite model, pulley configuration, mounting and terminals before quotation. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 3975140?

Documented direct interchanges: 3646916, BLD3368GH, 4372403, BLD3387GH. Manufacturer number: BLD3314GH.

How do I confirm 3975140 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 recovered references from the same system.

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