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Excavator Alternators
Alternator assembly identified by Isuzu number 181200-6281 and Mitsubishi number A9TU3387 (A009TU3387). Exact technical records specify 24V, 110A, clockwise rotation, a two-groove solid pulley, internal regulator and three mounting holes. Hitachi parts data records 1812006281 as an alternator assembly for the Isuzu 6WG1 engine; the first-party catalog records ZW550 equipment. Confirm the complete number, pulley, mounting, terminals and machine serial range before ordering.
Fitment status: Verified · Checked 2026-07-28Send the machine model, engine model or nameplate photo so our team can confirm compatibility before shipment.
| Relationship | Reference family | Number |
|---|---|---|
| Primary Part Number | Isuzu exact equipment number | 181200-6281 |
| Same-number Formatting Variant | Isuzu hyphenated catalog format | 1-81200-628-1 |
| Same-number Formatting Variant | Punctuation-normalized search alias | 1812006281 |
| Manufacturer Part Number | Mitsubishi exact reference | A9TU3387 |
| Same-number Formatting Variant | Zero-padded Mitsubishi format | A009TU3387 |
| Aftermarket Replacement Number | BV PSH exact product reference | 136.505.110.370 |
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Product fitment guide
Quickly compare the reference number and recorded machine applications. Use the original photos and the checklist before ordering.
Part identification
Formatting aliases are the same number written differently. Related assemblies and remanufactured numbers are not presented as direct interchanges.
Product summary
Before ordering
Machine fitment
4 model references
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
Recorded compatible model references include Engine model: Isuzu 6WG1 / 6WG1T family, Equipment family: Hitachi construction equipment with 6WG1, Recorded machine model: Hitachi ZW550 wheel loader, Fitment limitation: Confirm complete number, 24V/110A nameplate, pulley, mounting, terminals and machine serial range. Confirm the complete part number and machine serial range before ordering.
Manufacturer number: A9TU3387. Formatting aliases for the same number: 1-81200-628-1, 1812006281, A009TU3387.
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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