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Excavator Alternators

8600566 394-3494 12V 65A 8SI Alternator for Cat 301.5-304CR C1.5 C2.2

8600566 394-3494 12V 65A 8SI Alternator for Cat 301.5-304CR C1.5 C2.2, OEM/reference 8600566 / 394-3494 / 3943494 / LS13704, 12V 65A 8SI Alternator, product view 1
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OEM / reference8600566 / 394-3494 / 3943494 / LS13704
Specification12V 65A 8SI Alternator
Catalog ID75725428

8600566 is a 12V 65A Delco Remy 8SI new alternator with an M8 B+ output, no R terminal, an M5 I terminal, no remote-sense terminal and negative polarity. Delco Remy's exact customer-number lookup maps Cat reference 3943494 / 394-3494 to 8600566. The current Cat 394-3494 catalog record independently publishes the same 12V 65A rating and lists mini excavators 301.5, 301.6, 301.7CR, 301.8, 302CR, 302.7CR, 303CR, 303.5CR and 304CR, plus C1.1, C1.5, C2.2, 3013C, 3024 and 3024C engine applications. Confirm the 8600566 or 394-3494 number, 12V 65A rating, pulley, mounting feet, M8 B+ and M5 I terminals, and machine serial configuration before shipment.

Product Type
Alternator
Product Brand
EexcavaStart
Manufacturer Series
8SI
System Voltage
12 V
Rated Output
65 A
B+ Output Terminal
M8
R Terminal
None
I Terminal
M5
Remote Sense Terminal
No
Polarity
Negative
Original Equipment Catalog Status
Cat 394-3494 is currently listed as discontinued
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

RelationshipReference familyNumber
Primary Manufacturer Part NumberActive Delco Remy 8SI product identity8600566
Equipment Manufacturer Part NumberExact Delco Remy customer-number replacement lookup394-3494
Formatting AliasSame equipment-manufacturer number without the hyphen3943494
Owner Source Catalog ReferenceExact EexcavaStart source-folder reference for this physical unitLS13704
Related Higher-Output Product85A configuration; not a direct interchange without electrical-load and physical verification8600567
Related Higher-Output Catalog Record85A replacement family; not a direct interchange without electrical-load and physical verification20973N

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
  • 8600566
Manufacturer number
  • 394-3494
Formatting alias
  • 3943494
Related assembly
  • 8600567
  • 20973N
Other documented relationship
  • LS13704

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

Product summary

12V 65A 8SI Alternator

Category
Excavator Alternators
Catalog ID
75725428
Photo views
2

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

8 model references

  • Cat mini hydraulic excavators: 301.8, 303.5CR, 302.7CR, 301.6, 301.5, 304CR, 303CR, 302CR, 301.7CR
  • Cat generator sets: C2.2, C1.5
  • Cat industrial engines: 3024, 3013C, C2.2, C1.5, 3024C
  • Cat additional engine applications: C1.1, XQ20
  • Cat vibratory compactors: CB-34 XW, CB-214E, CB-224E, CB-335E, CB-34, CB-334E XW, CB-225E, CB-334E, CC-34
  • Cat asphalt paver: BB-621C
  • Cat compact wheel loader: 901
  • Fitment limitation: Confirm 8600566 / 394-3494, 12V, 65A, pulley, mounting feet, M8 B+, M5 I terminal and equipment serial/configuration before ordering

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 8600566

Which machines use 8600566?

Recorded compatible model references include Cat mini hydraulic excavators: 301.8, 303.5CR, 302.7CR, 301.6, 301.5, 304CR, 303CR, 302CR, 301.7CR, Cat generator sets: C2.2, C1.5, Cat industrial engines: 3024, 3013C, C2.2, C1.5, 3024C, Cat additional engine applications: C1.1, XQ20, Cat vibratory compactors: CB-34 XW, CB-214E, CB-224E, CB-335E, CB-34, CB-334E XW, CB-225E, CB-334E, CC-34, Cat asphalt paver: BB-621C, Cat compact wheel loader: 901, Fitment limitation: Confirm 8600566 / 394-3494, 12V, 65A, pulley, mounting feet, M8 B+, M5 I terminal and equipment serial/configuration before ordering. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 8600566?

Manufacturer number: 394-3494. Formatting aliases for the same number: 3943494. Related assembly numbers (not direct interchanges): 8600567, 20973N.

How do I confirm 8600566 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.

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