OEX Alternator 12V 80A Hitachi Style HXA9403

The OEX Alternator HXA9403 is a new 12V, 80A alternator built in a Hitachi style configuration. It is listed as a twin leg mount unit with an internal regulator, B pulley section, and a 82mm pulley outside diameter, so the physical mounting and belt arrangement can be checked against the original unit before ordering.

This alternator is identified with OEM number LR180-763 and is described as fitting Hitachi applications. Key measurements include 174mm mount centre to centre, 79mm inside mounting legs, a 10mm pivot hole diameter, and an M8x1.25 adjusting hole diameter. The unit weight is 4.82kg, which can be useful when comparing against the existing alternator during replacement.

A further fitment detail to note is that the unit has phase connection as a fly lead. That connection style, along with the mounting points and pulley dimensions, should be matched carefully to the vehicle or machine already in service. For a replacement alternator, those checks matter as much as voltage and amperage.

Key Features

• 12V, 80A alternator
• New unit, not remanufactured
• Internal regulator
• Twin leg alternator mount
• Hitachi style application
• Phase connection as fly lead

Specifications

• Voltage: 12V
• Power rating: 80A
• Regulator type: Internal
• New / Reman.: New
• Alternator mount: Twin leg
• Inside mounting legs: 79mm
• Mount centre to centre: 174mm
• Pivot hole diameter: 10mm

Confirmed fitment references

• Hitachi style alternator applications
• Komatsu: PC95R-2, PW95R-2, WA115PT-3, WA95-3, WB91R-2, WB93R-2, WB97S-2, WB98A-2
• Takeuchi: TB175, TB175W
• Sample application references include Komatsu PC95R-2 2000 to 2004 and Takeuchi TB175 2008 to 2013
• Always compare the original alternator mount, pulley section, and electrical connection before ordering

Application and Buying Notes

Before buying, match the part number HXA9403 and the OEM number LR180-763 to the unit being replaced. The key physical checks are the twin leg mount, 174mm mount centre to centre, 79mm inside mounting legs, 10mm pivot hole, and M8x1.25 adjuster hole. If any of those points differ from the fitted alternator, the unit may not be the correct replacement.

The pulley details also matter. This alternator has an 82mm outside diameter pulley with a B section belt profile, so belt match is important as well as mounting alignment. A change in pulley size or section can affect belt fit and charging setup, so it is worth comparing the old and new units side by side before installation.

Electrical connection should be checked with care. This unit uses an internal regulator and has a phase connection as a fly lead, which needs to suit the existing wiring arrangement. The alternator is rated at 12V and 80A, so it is intended as a direct replacement where those specifications match the original system requirements.

The listed weight is 4.82kg, which can help confirm you are comparing a similar alternator to the one already in the vehicle or machine. For Komatsu and Takeuchi applications shown below, use the application reference as a guide only and still verify the mounting layout, pulley type, and connector style on the actual unit fitted to the machine.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number HXA9403 helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type ALTERNATOR, Unit of Measure EACH, Warranty 3yr Passenger 1yr Commercial, Inside Mounting Legs 79mm, Pivot Hole Diameter 10, Pulley Outside Diameter 82mm, Regulator Type Internal, Voltage 12, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Weight 4.82kg, Product Group 1 ROTATING ELECTRICAL, Part No. HXA9403, Brand OEX, Description OEX Alternator 12V 80A Hitachi Style, Adjusting Hole Diameter M8x1.25, Pin Code IR49, Power Rating (Amp) 80, Pulley Section B, Suits Unit Make Hitachi.

OEX Alternator 12V 80A Hitachi Style. Part number HXA9403 should be checked first. Listed voltage is 12. Listed output rating is 80. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Twin Leg. Regulator type is Internal. Pulley configuration is B. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number HXA9403, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a alternator in workshop, fleet, trade, agricultural, or construction service, the listed voltage 12 and output 80 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include KOMATSU PC95R-2, KOMATSU PC95R-2 2000, KOMATSU PC95R-2 2001, KOMATSU PC95R-2 2002, TAKEUCHI TB175, TAKEUCHI TB175 2008. Even with application listings, final confirmation should still be based on the exact unit being replaced and the service requirements of the vehicle or machine.

Compatibility note: Confirm fitment by checking part number HXA9403, OEM number LR180-763, the twin leg mount dimensions, pulley section, and phase connection style against the original alternator before purchase.

FAQ

What type of alternator is this?

It is a new OEX alternator, 12V and 80A, in a Hitachi style configuration with an internal regulator.

What part number should I check against?

The listed part number is HXA9403. The OEM number supplied is LR180-763.

What are the main mounting dimensions?

Key mounting details are a twin leg mount, 79mm inside mounting legs, 174mm mount centre to centre, a 10mm pivot hole diameter, and an M8x1.25 adjusting hole diameter.

What pulley details are listed?

The alternator has an 82mm pulley outside diameter and a B pulley section.

Does it have a regulator built in?

Yes. The regulator type is listed as internal.

Which machines are listed in the fitment references?

Fitment references include Komatsu PC95R-2, PW95R-2, WA115PT-3, WA95-3, WB91R-2, WB93R-2, WB97S-2, WB98A-2, and Takeuchi TB175 and TB175W. These should still be checked against the original unit before ordering.