Excavator Alternators

8600398 4078701 24V 105A 36SI Alternator for Cat C18 C9 3512 3516

Name: 8600398 4078701 24V 105A 36SI Alternator for Cat C18 C9 3512 3516
Brand: EexcavaStart
SKU: 8600398

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OEM / reference8600398 / 4078701 / 20R-0541 / 331-5717

Specification24V 105A 36SI J180 Alternator

Catalog ID87507856

8600398 is an active 36SI heavy-duty alternator configuration rated at 24V and 105A. Delco Remy's exact product page specifies J180 hinge mounting, a 1/4-inch B+ output, PIN R terminal, #10 I terminal, remote sense and insulated polarity. Delco Remy's Cummins cross-reference independently maps 4078701 to 8600398. Cat's official 20R-0541 page identifies the same 24V, 105A, 36SI insulated remote-sense family and publishes compatibility for C18 generator sets, C18/C9 marine engines and selected 3512/3516 locomotive engines. The two retained EexcavaStart product photographs agree with the exact 8600398 replacement-catalog housing, rear plate and J180 mounting arrangement. Confirm the complete part number, terminals, mount, shaft/pulley arrangement and equipment serial range before shipment.

Product Type: Heavy-duty alternator
Product Brand: EexcavaStart
Manufacturer Series: 36SI
Design: IR/EF brushless alternator
System Voltage: 24 V
Rated Output: 105 A
Rotation: Bidirectional (BI)
Mount Type: J180 hinge; two mounting feet and one mounting ear
B+ Output: 1/4 inch
R Terminal: PIN
I Terminal: #10
Remote Sense: Yes
Ground / Polarity: Insulated
Pulley: Supplied without pulley
Drive-end to Rotor Shaft End: 99 mm
Split Mounting Ear Thickness: 101.6 mm
Cooling: External fan
Condition: New replacement part

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Part-number relationships

Relationship	Reference family	Number
Primary Manufacturer Part Number	Delco Remy active 36SI product	8600398
Cummins Cross-Reference	Delco Remy exact manufacturer cross-reference	4078701
Cat Reman Alternate	Cat official 24V 105A 36SI insulated remote-sense alternator	20R-0541
Cat Charging Alternator Alternate	Cat official alternate part for the 20R-0541 family	331-5717
Cat Replacement Catalog Reference	Published in the exact 8600398 replacement family	2667227
Delco Replacement-Family References	Published in the exact WAI 8684N replacement family; not formatting aliases	8600384, 19011165, 19011203
Replacement Catalog Number	Exact 24V 105A 36SI record	8684N
Owner Source Catalog Reference	Exact owned source-folder reference; not asserted as an OEM interchange	LS13252

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

8600398

Remanufactured number

20R-0541

Other documented relationship

4078701
331-5717
2667227
8600384, 19011165, 19011203
8684N
LS13252

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

Product summary

24V 105A 36SI J180 Alternator

Category: Excavator Alternators
Catalog ID: 87507856
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

5 model references

Cat Generator Set: C18
Cat Marine Engine: C18 / C9
Cat Locomotive Engine: 3512E / 3512C / 3512B / 3516C / 3516B
Related 331-5717 engine families: C9 / C11 / C13 / C18 / 3508 / 3512 / 3516; confirm the exact equipment serial range
Fitment limitation: Confirm 8600398, 4078701, 20R-0541 or 331-5717; 24V 105A rating; J180 mount; insulated ground; terminals; shaft/pulley arrangement and equipment serial range 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 8600398

Which machines use 8600398?

Recorded compatible model references include Cat Generator Set: C18, Cat Marine Engine: C18 / C9, Cat Locomotive Engine: 3512E / 3512C / 3512B / 3516C / 3516B, Related 331-5717 engine families: C9 / C11 / C13 / C18 / 3508 / 3512 / 3516; confirm the exact equipment serial range, Fitment limitation: Confirm 8600398, 4078701, 20R-0541 or 331-5717; 24V 105A rating; J180 mount; insulated ground; terminals; shaft/pulley arrangement and equipment serial range before ordering.. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 8600398?

Remanufactured references: 20R-0541.

How do I confirm 8600398 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.