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Alternators

600-821-3840 24V 15A Alternator for Komatsu D20 D21

600-821-3840 24V 15A Alternator for Komatsu D20 D21, OEM/reference 600-821-3840, Alternator, product view 1
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OEM / reference600-821-3840
SpecificationAlternator
Catalog ID53684814
Product Type
Alternator
Product Brand
EexcavaStart
Technical Specification
15 Amp/24 Volt, CW, 1-Groove Pulley
Design
IR/EF
Voltage
24V
Amperage
15A
Rotation
CW
Pulley Class
V1
Pulley Note
76.9MM OD
Condition
New replacement part
Reference limitation
Confirm original-unit ratings, mounting, connections and equipment serial range; related numbers do not guarantee universal interchange.
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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 NumberProduct reference600-821-3840
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration12253N
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration0-33000-5480
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration0-33000-5510
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration0-33000-5700
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration113212
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration12253
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration12256
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration144-14201
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration166.001.020
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration166.001.020.130
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration166.001.020.710
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration285-125
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration285-130
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration310-003
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration400-50012
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration40796RI
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration600-821-3850
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration600-821-3860
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration612253
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration612256
Cross-reference (fitment check required)Confirm electrical, mounting and application configuration90-28-4022
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationA-8821
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationALT29003
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationANK0009
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationAVF-12253
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationAVF-12256
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationCAL50602AS
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationCAL50602GS
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationCAL50620GS
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationF032113212
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationF674091
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationLRA02455
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationRKD15A01
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationX612253
Cross-reference (fitment check required)Confirm electrical, mounting and application configurationX612256
Cross-reference (fitment check required)ARROWHEADANK0009
Cross-reference (fitment check required)ARROWHEAD400-50031
Cross-reference (fitment check required)CARGO113212
Cross-reference (fitment check required)J&N Electrical Products400-50012
Cross-reference (fitment check required)KOMATSU600821-3850
Cross-reference (fitment check required)KOMATSU600821-3860
Cross-reference (fitment check required)KOMATSUF674091
Cross-reference (fitment check required)KOMATSU REMANRKD15A01
Cross-reference (fitment check required)LESTER12253
Cross-reference (fitment check required)LESTER12256
Cross-reference (fitment check required)NIKKO0-33000-5480
Cross-reference (fitment check required)NIKKO0-33000-5510
Cross-reference (fitment check required)NIKKO0-33000-5700

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
  • 600-821-3840
Cross-reference (fitment check required)
  • 12253N
  • 0-33000-5480
  • 0-33000-5510
  • 0-33000-5700
  • 113212
  • 12253
  • 12256
  • 144-14201
  • 166.001.020
  • 166.001.020.130
  • 166.001.020.710
  • 285-125
  • 285-130
  • 310-003
  • 400-50012
  • 40796RI
  • 600-821-3850
  • 600-821-3860
  • 612253
  • 612256
  • 90-28-4022
  • A-8821
  • ALT29003
  • ANK0009
  • AVF-12253
  • AVF-12256
  • CAL50602AS
  • CAL50602GS
  • CAL50620GS
  • F032113212
  • F674091
  • LRA02455
  • RKD15A01
  • X612253
  • X612256
  • 400-50031
  • 600821-3850
  • 600821-3860

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
53684814
Photo views
5

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

60 model references

  • Recorded application: Make: Komatsu · Model: D20 · Year: 1988-1990 · Engine: 4D95S Engine
  • Recorded application: Make: Komatsu · Model: D21 · Year: 1988-1990 · Engine: 4D95S Engine
  • Recorded application: Make: Komatsu · Model: D31 · Year: 1988-1995 · Engine: 4D105 Engine
  • Recorded application: Make: Komatsu · Model: D31 · Year: 1988-1995 · Engine: 6D105 Engine
  • Recorded application: Make: Komatsu · Model: D31 · Year: 1988-1995 · Engine: 6D95L Engine
  • Recorded application: Make: Komatsu · Model: D40 · Year: 1986-1995 · Engine: 4D105-5 Engine
  • Recorded application: Make: Komatsu · Model: D40 · Year: 1986-1995 · Engine: 6D105-5 Engine
  • Recorded application: Make: Komatsu · Model: D40 · Year: 1986-1995 · Engine: 6D95L Engine
  • Recorded application: Make: Komatsu · Model: D41 · Year: 1986-1995 · Engine: 4D105-5 Engine
  • Recorded application: Make: Komatsu · Model: D41 · Year: 1986-1995 · Engine: 6D105-5 Engine
  • Recorded application: Make: Komatsu · Model: D41 · Year: 1988-1995 · Engine: 6D95L Engine
  • Recorded application: Make: Komatsu · Model: E70Z · Year: 1991-1995 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: E70ZS · Year: 1991-1995 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: EC50Z · Year: 1986-1995 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: EC50ZS · Year: 1986-1995 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: EC50ZSB · Year: 1995-1997 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: EC75Z · Year: 1986-1995 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: EC75ZS · Year: 1986-1995 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: EG85B · Year: 1986-1994 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: EG85BS · Year: 1986-1994 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD23-10 · Year: 1991-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD25-10 · Year: 1989-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD25-11 · Year: 1989-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD25S-11 · Year: 1989-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD25V-11 · Year: 1989-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD28-10 · Year: 1988-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD30-11 · Year: 1988-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD30H-11 · Year: 1988-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD30S-11 · Year: 1988-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD30S-5 · Year: 1988-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD30SV-11 · Year: 1990-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD30V-11 · Year: 1990-2007 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40DC · Year: 1986-1994 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40HT · Year: 1986-2007 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40HTE · Year: 1986-1997 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40HTE · Year: 1995-1997 · Engine: 6D105 Engine
  • Recorded application: Make: Komatsu · Model: FD40HWC · Year: 1986-2007 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40HWCE · Year: 1995-2007 · Engine: 6D105 Engine
  • Recorded application: Make: Komatsu · Model: FD40HWCE · Year: 1995-2007 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40S-4 · Year: 1989-1991 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40WC · Year: 1986-2007 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40WCE · Year: 1995-1997 · Engine: 6D105 Engine
  • Recorded application: Make: Komatsu · Model: FD40WCE · Year: 1995-1997 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40Z-4 · Year: 1990-1992 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD40Z-5 · Year: 1993-1995 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD45-4 · Year: 1989-1991 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD45-5 · Year: 1991-1994 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD45H-4 · Year: 1989-1992 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD45S-4 · Year: 1989-1993 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD50E · Year: 1986-1997 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD50H · Year: 1986-1994 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: FD70HE · Year: 1995-1997 · Engine: 6D105 Engine
  • Recorded application: Make: Komatsu · Model: FD70HE · Year: 1995-1997 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: PC60 · Year: 1995-1997 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: PC75U · Year: 1995-1997 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: PC80 · Year: 1995-1997 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: PC90 · Year: 1995-1997 · Engine: 4D95 Engine
  • Recorded application: Make: Komatsu · Model: S23 · Year: 1987-1994 · Engine: 6D95 Engine
  • Recorded application: Make: Komatsu · Model: S23E · Year: 1987-1994 · Engine: 6D95 Engine
  • Komatsu catalog engine references: 4D95L-1P

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 600-821-3840

Which machines use 600-821-3840?

Recorded compatible model references include Recorded application: Make: Komatsu · Model: D20 · Year: 1988-1990 · Engine: 4D95S Engine, Recorded application: Make: Komatsu · Model: D21 · Year: 1988-1990 · Engine: 4D95S Engine, Recorded application: Make: Komatsu · Model: D31 · Year: 1988-1995 · Engine: 4D105 Engine, Recorded application: Make: Komatsu · Model: D31 · Year: 1988-1995 · Engine: 6D105 Engine, Recorded application: Make: Komatsu · Model: D31 · Year: 1988-1995 · Engine: 6D95L Engine, Recorded application: Make: Komatsu · Model: D40 · Year: 1986-1995 · Engine: 4D105-5 Engine, Recorded application: Make: Komatsu · Model: D40 · Year: 1986-1995 · Engine: 6D105-5 Engine, Recorded application: Make: Komatsu · Model: D40 · Year: 1986-1995 · Engine: 6D95L Engine and 52 additional models shown on this page. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 600-821-3840?

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 600-821-3840 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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