Excavator Alternators

John Deere AR40420 Alternator for 135 and 152 Series OEM Power Units 310A

Q: What numbers are documented for AR40420?

Primary Part Number: AR40420. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm AR40420 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.

Brand illustration · Exact product photo available on request.

OEM / referenceAR40420

SpecificationAlternator

Catalog ID91001007

The supplied John Deere application catalog identifies AR40420 as an alternator assembly. The source set contains 59 supporting catalog rows. Recorded machine applications include 135 and 152 Series OEM Power Units, 180 and 202 Series OEM Engines, 3020 Row-Crop Tractor (S.N. 123; 000- ), 310A, 310B Backhoe Loaders, 3179DF/3179TF OEM Engines. 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: John Deere
Catalog Classification: Alternator
Application Records: 59
Condition: New replacement part
Gallery Representation: EexcavaStart neutral packaging illustration; exact product photo available on request

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

Part-number relationships

Relationship	Reference family	Number
Primary Part Number	Exact identity retained from the supplied application catalog	AR40420

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

AR40420

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: 91001007
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

5 model references

Machine models 1: 135 and 152 Series OEM Power Units / 180 and 202 Series OEM Engines / 3020 Row-Crop Tractor (S.N. 123; 000- ) / 310A / 310B Backhoe Loaders / 3179DF/3179TF OEM Engines / Accessories and Repower (Saran) / 3430 and 3830 Self-Propelled Windrowers / 4000 and 4020 (s.n. 201; 000- ) Tractors / 410 Backhoe Loader
Machine models 2: 4239D and 4239T OEM Engines and Accessories (Dubuque) / 4276 OEM Engines and Accessories (Dubuque) / 4320 Tractor / 4520 Tractor / 4620 Tractor / 500C Backhoe Loader / 5010 Tractor / 5020 (S.N. 025; 000- ) Tractor / 5020 (S.N.-024; 999) Tractor / 510 Backhoe Loader
Machine models 3: 6000 Hi-Cycle / 6030 Tractor / 6329D OEM Engine and Accessories / 690 and 690A Excavators / 7020 Tractor ( ) / 7520 Tractor ( ) / JD310 Backhoe Loader / JD500 Series A (-123113) Backhoe Loader / JD500 Series B Backhoe Loader / JD500 Tractor
Machine models 4: JD500-A (123114-152141) Backhoe Loader / JD600 Tractor / JD700 Series A Tractor / JD760 Series A Tractor
Fitment limitation: Confirm the exact part number, electrical rating, terminal layout, mounting and machine serial range before shipment

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 AR40420

Which machines use AR40420?

Recorded compatible model references include Machine models 1: 135 and 152 Series OEM Power Units / 180 and 202 Series OEM Engines / 3020 Row-Crop Tractor (S.N. 123; 000- ) / 310A / 310B Backhoe Loaders / 3179DF/3179TF OEM Engines / Accessories and Repower (Saran) / 3430 and 3830 Self-Propelled Windrowers / 4000 and 4020 (s.n. 201; 000- ) Tractors / 410 Backhoe Loader, Machine models 2: 4239D and 4239T OEM Engines and Accessories (Dubuque) / 4276 OEM Engines and Accessories (Dubuque) / 4320 Tractor / 4520 Tractor / 4620 Tractor / 500C Backhoe Loader / 5010 Tractor / 5020 (S.N. 025; 000- ) Tractor / 5020 (S.N.-024; 999) Tractor / 510 Backhoe Loader, Machine models 3: 6000 Hi-Cycle / 6030 Tractor / 6329D OEM Engine and Accessories / 690 and 690A Excavators / 7020 Tractor ( ) / 7520 Tractor ( ) / JD310 Backhoe Loader / JD500 Series A (-123113) Backhoe Loader / JD500 Series B Backhoe Loader / JD500 Tractor, Machine models 4: JD500-A (123114-152141) Backhoe Loader / JD600 Tractor / JD700 Series A Tractor / JD760 Series A Tractor, 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 AR40420?

No alternate number is listed for AR40420. Send the original nameplate for an alternate-number check.

How do I confirm AR40420 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.