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Alternators

RE257541 Replacement Alternator for John Deere 4720 Self-Propelled Sprayer 7720 9120

OEM / referenceRE257541
SpecificationAlternator
Catalog ID91000050
Product Type
Alternator
Product Brand
EexcavaStart
Equipment Brand
John Deere
Condition
New replacement part
Voltage
12 V
Amperage
150 A
Fan
Internal
Regulator
Internal
Polarity
Negative
Pulley Grooves
8
Pulley Type
Solid
Pulley Outer Diameter
70 mm

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

RelationshipReference familyNumber
Primary Part NumberExact supplied catalog and source-folder identityRE257541
Cross-reference (fitment check required)ArrowheadAND0548
Cross-reference (fitment check required)ArrowheadND104210-3921
Cross-reference (fitment check required)Denso021080-0140
Cross-reference (fitment check required)Denso104210-3920
Cross-reference (fitment check required)Denso104210-3921
Cross-reference (fitment check required)J&N Electrical Products400-52264
Cross-reference (fitment check required)J&N Electrical Products400-52264R
Cross-reference (fitment check required)John DeereRE186320
Cross-reference (fitment check required)John DeereSE501837
Cross-reference (fitment check required)Lester12660
Cross-reference (fitment check required)Lucas ElectricLRA03912

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
  • RE257541
Cross-reference (fitment check required)
  • AND0548
  • ND104210-3921
  • 021080-0140
  • 104210-3920
  • 104210-3921
  • 400-52264
  • 400-52264R
  • RE186320
  • SE501837
  • 12660
  • LRA03912

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

Alternator

Category
Alternators
Catalog ID
91000050
Photo views
3

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

2 model references

  • Machine models 1: 4720 Self-Propelled Sprayer / 7720 / 7820 and 7920 Tractors ( ) / 7815 Tractors (S.N. -053261)( ) / 9120 / 9220 / 9320 / 9420 / 9520 and 9620 Tractors ( ) / 9320T
  • Machine models 2: 9420T / 9520T / 9620T Tractors ( )

Fitment / evidence notes

  • Fitment limitation: Confirm the exact part number, voltage/output or power 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 RE257541

Which machines use RE257541?

Recorded compatible model references include Machine models 1: 4720 Self-Propelled Sprayer / 7720 / 7820 and 7920 Tractors ( ) / 7815 Tractors (S.N. -053261)( ) / 9120 / 9220 / 9320 / 9420 / 9520 and 9620 Tractors ( ) / 9320T, Machine models 2: 9420T / 9520T / 9620T Tractors ( ). Recorded fitment/evidence notes: Fitment limitation: Confirm the exact part number, voltage/output or power 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 RE257541?

Cross-references are listed in the relationship table above. Compare specifications and the original unit before treating a reference as interchangeable.

How do I confirm RE257541 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.

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