Part-number relationships
| Relationship | Reference family | Number |
|---|---|---|
| Primary Part Number | Exact identity retained from the supplied application catalog | 121-4135 |
Excavator Alternators
Caterpillar 121-4135 Alternator for AP-1000 AP-1050 3116
Brand illustration · Exact product photo available on request.
OEM / reference121-4135
SpecificationAlternator
Catalog ID91000727
The supplied Caterpillar application catalog identifies 121-4135 as an alternator assembly. The source set contains 3 supporting catalog rows. Recorded machine applications include AP-1000, AP-1050; recorded engine references include 3116. Confirm the complete part number, electrical rating, terminals, mounting arrangement and machine serial range against the original unit before ordering.
- Product Type
- Alternator
- Supply Brand
- EexcavaStart
- Equipment Brand
- Caterpillar
- Catalog Classification
- Alternator Gp -B
- Application Records
- 3
- Condition
- New replacement part
- Gallery Representation
- EexcavaStart neutral packaging illustration; exact product photo available on request
Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
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
Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.
Product summary
Alternator
- Category
- Excavator Alternators
- Catalog ID
- 91000727
- 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
3 model references
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 121-4135
Which machines use 121-4135?
Recorded compatible model references include Machine models: AP-1000 / AP-1050, Engine models: 3116, Fitment limitation: Confirm the exact part number, electrical rating, terminal layout, mounting and machine serial range before shipment. Confirm the complete part number and machine serial range before ordering.
What numbers are documented for 121-4135?
No alternate number is listed for 121-4135. Send the original nameplate for an alternate-number check.
How do I confirm 121-4135 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.