Excavator Alternators

8981808750 LR280-509 24V 80A Alternator with Vacuum Pump for 4HK1 NQR90

Q: What numbers are documented for 8981808750?

Primary Part Number: 8981808750. Same-number Formatting Variant: 8-98180-875-0. Manufacturer Part Number: LR280-509. Same-number Formatting Variant: LR280509. Equipment Catalog Reference - Verify Configuration: 8973515740. Equipment Catalog Reference - Verify Configuration: 8972489141. Interchange Reference: LR280-508. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 8981808750 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.

8981808750 LR280-509 24V 80A Alternator with Vacuum Pump for 4HK1 NQR90, OEM/reference 8981808750, Alternator with Vacuum Pump, product view 1

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OEM / reference8981808750

SpecificationAlternator with Vacuum Pump

Catalog ID53680772

Alternator referenced by 8981808750. An exact part-number match confirms 18 application records and 78 related reference numbers. Verified configuration: 75 Amp/12 Volt, CW, 4-Groove Pulley. Confirm the complete part number, mounting arrangement, electrical connection and machine serial range before ordering.

Product Type: Alternator with Vacuum Pump
Product Brand: EexcavaStart
Voltage: 24V
Rated Output: 80A
Vacuum Pump: Integral
Mounting Dimension A: 43 mm
Mounting Dimension B: 17 mm
Mounting Dimension C: 77 mm
Mounting Code: G3
Condition: New replacement part

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Part-number relationships

Relationship	Reference family	Number
Primary Part Number	Equipment manufacturer identity	8981808750
Same-number Formatting Variant	Manufacturer-formatted search alias	8-98180-875-0
Manufacturer Part Number	Hitachi alternator identity	LR280-509
Same-number Formatting Variant	Punctuation-normalized search alias	LR280509
Equipment Catalog Reference - Verify Configuration	Replacement-family listing	8973515740
Equipment Catalog Reference - Verify Configuration	Replacement-family listing	8972489141
Interchange Reference	comparison record	LR280-508

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

8981808750

Manufacturer number

LR280-509

Formatting alias

8-98180-875-0
LR280509

Direct interchange

LR280-508

Other documented relationship

8973515740
8972489141

Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.

Product summary

Alternator with Vacuum Pump

Category: Excavator Alternators
Catalog ID: 53680772
Photo views: 4

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

4 model references

Engine model: 4HK1
Vehicle / equipment family: NQR90
Related application families: NKR and NPR equipment using the matching 24V 80A vacuum-pump alternator configuration
Fitment limitation: Verify 24V system, 80A output, pulley grooves, mounting dimensions, connector and vacuum-pump hose-port arrangement

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 8981808750

Which machines use 8981808750?

Recorded compatible model references include Engine model: 4HK1, Vehicle / equipment family: NQR90, Related application families: NKR and NPR equipment using the matching 24V 80A vacuum-pump alternator configuration, Fitment limitation: Verify 24V system, 80A output, pulley grooves, mounting dimensions, connector and vacuum-pump hose-port arrangement. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 8981808750?

Documented direct interchanges: LR280-508. Manufacturer number: LR280-509. Formatting aliases for the same number: 8-98180-875-0, LR280509.

How do I confirm 8981808750 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.

Continue comparing verified references from the same system.

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