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Excavator Engine Parts

129064-77330 Alternator Belt Adjuster for Yanmar 3TNV84T 3TNV88 4TNV88

Name: 129064-77330 Alternator Belt Adjuster for Yanmar 3TNV84T 3TNV88 4TNV88
Brand: EexcavaStart
SKU: 129064-77330

OEM / reference129064-77330

SpecificationAlternator Belt Adjuster Bracket

Catalog ID85698999

Slotted alternator-belt adjuster bracket identified by Yanmar part number 129064-77330. Yanmar parts catalogs list it as ADJUSTER or ADJUSTER, BELT in the generator group for multiple 3TNV84T, 3TNV88 and 4TNV88 engine variants. Confirm the curved profile, slot length, mounting-hole diameter, bracket offset and engine suffix before ordering.

Fitment status: Verified · Checked 2026-07-28

Product Type: Alternator Belt Adjuster Bracket
Product Brand: EexcavaStart
Installation Area: Generator / alternator belt adjustment
Compatible Engine Family: Yanmar 3TNV84T / 3TNV88 / 4TNV88
Condition: New replacement part

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Part-number relationships

Relationship	Reference family	Number
Primary Equipment Part Number	Yanmar alternator belt adjuster bracket	129064-77330

Evidence record

Source: Exact-reference evidence retained for internal audit
Evidence grade: manufacturer-supported
Checked: 2026-07-28

Source URLs, catalog files and local evidence paths are stored in the protected product audit record and are not public outbound links.

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

129064-77330

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

Product summary

Alternator Belt Adjuster Bracket

Category: Excavator Engine Parts
Catalog ID: 85698999
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

4 model references

Engine family: Yanmar 3TNV84T
Engine family: Yanmar 3TNV88
Engine family: Yanmar 4TNV88
Fitment limitation: Confirm profile, slot length, hole diameter, bracket offset and complete engine suffix

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 129064-77330

Which machines use 129064-77330?

Recorded compatible model references include Engine family: Yanmar 3TNV84T, Engine family: Yanmar 3TNV88, Engine family: Yanmar 4TNV88, Fitment limitation: Confirm profile, slot length, hole diameter, bracket offset and complete engine suffix. Confirm the complete part number and machine serial range before ordering.

What numbers are documented for 129064-77330?

129064-77330 is the only classified number in the current evidence record. Send the original nameplate for an alternate-number check.

How do I confirm 129064-77330 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 recovered references from the same system.

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