Part-number relationships
| Relationship | Reference family | Number |
|---|---|---|
| Primary Part Number | Exact identity retained from the supplied application catalog | AR78538 |
Starter Motors
Starter Motor AR78538 for John Deere 4000 and 4020 Tractors 4030 Tractor 570
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.
OEM / referenceAR78538
SpecificationStarter Motor
Catalog ID91000093
- Product Type
- Starter Motor
- Supply Brand
- EexcavaStart
- Equipment Brand
- John Deere
- Catalog Classification
- Starter Motor
- Application Records
- 91
- 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.
Quotation details: MOQ, availability, lead time, item condition (new or remanufactured) and warranty coverage must be confirmed in your quotation before ordering.
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
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
Starter Motor
- Category
- Starter Motors
- Catalog ID
- 91000093
- Illustration views
- 1
Before ordering
Confirm these details
- Confirm voltage and power rating against the original starter nameplate.
- Compare mounting-hole pattern, flange position and overall body orientation.
- Confirm pinion tooth count and rotation where those values are specified.
- Verify the engine model and machine serial range before ordering.
Machine fitment
Compatible model references
3 model references
Fitment / evidence notes
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 AR78538
Which machines use AR78538?
Recorded compatible model references include Machine models 1: 4000 and 4020 (s.n. 201; 000- ) Tractors / 4030 Tractor / 4230 Tractor / 4320 Tractor / 4430 Tractor / 4520 Tractor / 4620 Tractor / 4630 Tractor / 4640 and 4840 Tractors / 5200 and 5400 Forage Harvesters, Machine models 2: 544B Loader / 570 / 570A (Automatic Blade Control System) Motor Graders / 6414D and 6414T OEM Engines and Accessories / 646 and 646B Compactors / 6600 Combine / 6602 Hillside Combine / 690 and 690A Excavators / 7020 Tractor ( ) / 7700 Combine, Machine models 3: 8430 Tractor (1974-1981) ( ) / 8440 and 8640 Tractors / 8450 / 8650 Tractors ( ) / 8650 Tractors ( ) / 4640 and 4840 Tractors / 8440 and 8640 Tractors / Engine - 6404AR 01 / 02 / 14 / 15 (7020) / JD544 and JD544A Loaders. Recorded fitment/evidence notes: 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 AR78538?
No alternate number is listed for AR78538. Send the original nameplate for an alternate-number check.
How do I confirm AR78538 before ordering?
Confirm voltage and power rating against the original starter nameplate. Compare mounting-hole pattern, flange position and overall body orientation. Confirm pinion tooth count and rotation where those values are specified. Send clear photos of the original unit and connector layout when requesting a quote.