EexcavaStart 101211-2780 12V 55A Alternator for Caterpillar 301.5 301.6 301.8
EexcavaStart packaging illustration · Not a photograph of this exact part. Exact-unit photo availability is not confirmed; send your original part number and unit photos with your inquiry.
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
DENSO
101211-2780
Search Format Alias
Formatting variant only
1012112780
Cross-reference (fitment check required)
ARROWHEAD
AND0544
Cross-reference (fitment check required)
ARROWHEAD
400-52267
Cross-reference (fitment check required)
ARROWHEAD
ND101211-2780
Cross-reference (fitment check required)
CATERPILLAR
0R9698
Cross-reference (fitment check required)
CATERPILLAR
144-9952
Cross-reference (fitment check required)
J&N Electrical Products
400-52267
Cross-reference (fitment check required)
LESTER
12854
Product fitment guide
Part numbers and compatible models
Quickly compare the reference number and recorded machine applications. Use photos of your original unit and the checklist before ordering.
Part identification
Reference numbers
Primary number
101211-2780
Formatting alias
1012112780
Cross-reference (fitment check required)
AND0544
400-52267
ND101211-2780
0R9698
144-9952
12854
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
12V 55A Alternator
Category
Alternators
Catalog ID
50413288
Illustration 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.
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 5 additional models shown on this page. Recorded fitment/evidence notes: Fitment limitation: Confirm the original part number, electrical rating, pinion or pulley, terminals, mounting geometry and equipment serial range before ordering. Confirm the complete part number and machine serial range before ordering.
What numbers are documented for 101211-2780?
Cross-references are listed in the relationship table above. Compare specifications and the original unit before treating a reference as interchangeable. 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.
