Excavator Alternators

123951-77200 12V 55A Alternator for Yanmar 4TNV98T 4TNV106

Q: What numbers are documented for 123951-77200?

Primary Equipment Part Number: 123951-77200. Formatted Alias: 12395177200. Conflicting Owned-Source Reference: 101211-2990. Relationship labels distinguish formatting aliases, direct interchanges, remanufactured references and related assemblies.

Q: How do I confirm 123951-77200 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.

123951-77200 12V 55A Alternator for Yanmar 4TNV98T 4TNV106, OEM/reference 123951-77200, 12V 55A Alternator, product view 1

1 / 6

6 product photos · Swipe on mobile, or hover and select a thumbnail.

OEM / reference123951-77200

Specification12V 55A Alternator

Catalog ID86604687

123951-77200 Alternator for Excavator and Diesel Equipment. EexcavaStart alternator identified by reference 123951-77200. Compare the complete part number, connector or mounting configuration, and the original product photos before ordering. Send the machine model, serial number, and nameplate photo for a fitment check.

Product Type: Alternator / generator assembly
Voltage: 12 V
Amperage: 55 A
Pulley: Single groove
Signal Plug: L-IG-P configuration

Send email inquiry Ask on WhatsApp Return to catalog

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 Equipment Part Number	Yanmar generator reference	123951-77200
Formatted Alias	Same Yanmar number without separators	12395177200
Conflicting Owned-Source Reference	Not asserted as direct interchange	101211-2990

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

123951-77200

Formatting alias

12395177200

Other documented relationship

101211-2990

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

Product summary

12V 55A Alternator

Category: Excavator Alternators
Catalog ID: 86604687
Photo views: 6

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

3 model references

Manufacturer-documented engine: Yanmar 4TNV98T
Published related engines: Yanmar 4TNV98 / 4TNV106 / 4TNV106T arrangements; verify catalog and serial
Fitment limitation: Confirm label, output, pulley, plug, mount and engine serial range

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 123951-77200

Which machines use 123951-77200?

Recorded compatible model references include Manufacturer-documented engine: Yanmar 4TNV98T, Published related engines: Yanmar 4TNV98 / 4TNV106 / 4TNV106T arrangements; verify catalog and serial, Fitment limitation: Confirm label, output, pulley, plug, mount and engine serial range. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 123951-77200?

Formatting aliases for the same number: 12395177200.

How do I confirm 123951-77200 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.

Browse this category