Alternators

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

Q: What numbers are documented for 8600398?

Primary Manufacturer Part Number: 8600398. Cummins Cross-Reference: 4078701. Cat Reman Alternate: 20R-0541. Cat Charging Alternator Alternate: 331-5717. Cat Replacement Catalog Reference: 2667227. Delco Replacement-Family References: 8600384, 19011165, 19011203. Replacement Catalog Number: 8684N. Owner Source Catalog Reference: LS13252. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 8600398 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.

8600398 4078701 24V 105A 36SI Alternator for Cat C18 C9 3512 3516, OEM/reference 8600398 / 4078701 / 20R-0541 / 331-5717, 24V 105A 36SI J180 Alternator, product view 1

1 / 2

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

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

Specification24V 105A 36SI J180 Alternator

Catalog ID87507856

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

Send email inquiry Ask on WhatsApp Return to catalog

Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.

Quotation details: MOQ, availability, lead time, item condition (new or remanufactured) and warranty coverage must be confirmed in your quotation before ordering.

Part-number relationships

Relationship	Reference family	Number
Primary Manufacturer Part Number	Delco Remy active 36SI product	8600398
Cross-reference (fitment check required)	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	8684N replacement-family references; 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

Cross-reference (fitment check required)

4078701

Remanufactured number

20R-0541

Other documented relationship

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

Formatting aliases are the same number written differently. Cross-references require a specification and fitment check; they do not by themselves confirm direct interchangeability. Related assemblies and remanufactured numbers are separate relationship types.

Product summary

24V 105A 36SI J180 Alternator

Category: 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

4 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 / evidence notes

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. Recorded fitment/evidence notes: 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?

Documented reference numbers (verify configuration; not automatically direct interchanges): 331-5717, 2667227, 8600384, 19011165, 19011203, 8684N, LS13252. See the complete relationship table above. Cross-references are listed in the relationship table above. Compare specifications and the original unit before treating a reference as interchangeable. 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.