Excavator Alternators

EexcavaStart 101211-2780 12V 55A Alternator for Caterpillar 301.5 301.6 301.8

Q: What numbers are documented for 101211-2780?

Primary Manufacturer Part Number: 101211-2780. Search Format Alias: 1012112780. Interchange Reference: AND0544. Interchange Reference: 400-52267. Interchange Reference: ND101211-2780. Interchange Reference: 0R9698. Interchange Reference: 144-9952. Interchange Reference: 12854. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 101211-2780 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.

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OEM / reference101211-2780

Specification12V 55A Alternator

Catalog ID50413288

12V 55A Alternator reference 101211-2780. Compare the complete part number, connector layout, mounting points and original unit before ordering; machine serial range can affect fitment.

Product Type: Alternator
Product Brand: EexcavaStart
Item Condition: Aftermarket Part
Unit Type: Alternator
Part Type: UNIT
Voltage: 12
Amperage: 55
Pulley Class: V1
Regulator: IR
Fan Type: IF
Fits: CATERPILLAR
Image Disclosure: EexcavaStart labeled packaging placeholder; product photo pending

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Part-number relationships

Relationship	Reference family	Number
Primary Manufacturer Part Number	DENSO	101211-2780
Search Format Alias	Formatting variant only	1012112780
Interchange Reference	ARROWHEAD	AND0544
Interchange Reference	ARROWHEAD	400-52267
Interchange Reference	ARROWHEAD	ND101211-2780
Interchange Reference	CATERPILLAR	0R9698
Interchange Reference	CATERPILLAR	144-9952
Interchange Reference	J&N Electrical Products	400-52267
Interchange Reference	LESTER	12854

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

101211-2780

Formatting alias

1012112780

Direct interchange

AND0544
400-52267
ND101211-2780
0R9698
144-9952
12854

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

Product summary

12V 55A Alternator

Category: Excavator Alternators
Catalog ID: 50413288
Photo views: 1

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

14 model references

CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 1998
CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 1999
CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2000
CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2001
CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2002
CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2003
CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2004
CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2005
CATERPILLAR 301.6: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 1999 - On
CATERPILLAR 301.8: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 1999 - On
CATERPILLAR 302.5: Equipment type: Excavators - Mini; Engine: Cat. 3013 (22.9HP Dsl); Year: 1999 - On
CATERPILLAR 303.5: Equipment type: Excavators - Mini; Engine: Cat. 3013 (26.1HP Dsl); Year: 1999 - On
CATERPILLAR 304.5: Equipment type: Excavators - Mini; Engine: Cat. 3024; Year: 1999 - On
Fitment limitation: Confirm the original part number, electrical rating, pinion or pulley, terminals, mounting geometry 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 101211-2780

Which machines use 101211-2780?

Recorded compatible model references include CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 1998, CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 1999, CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2000, CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2001, CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2002, CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2003, CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2004, CATERPILLAR 301.5: Equipment type: Excavators - Mini; Engine: Cat. 3003 (17.4HP Dsl); Year: 2005 and 6 additional models shown on this page. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 101211-2780?

Documented direct interchanges: AND0544, 400-52267, ND101211-2780, 0R9698, 144-9952, 12854. Formatting aliases for the same number: 1012112780.

How do I confirm 101211-2780 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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