OEX Alternator 24V 40A Hitachi Style HXA9402

The OEX Alternator HXA9402 is a new 24V, 40 amp alternator built in a Hitachi style configuration. It is listed with an external regulator, twin leg alternator mount, and a BB pulley section, so it is important to match the physical layout and electrical setup to the vehicle before ordering.

Key mounting dimensions for this unit include 70mm inside mounting legs and 190mm mount centre to centre, with a 12mm adjusting hole diameter and 14.5mm pivot hole diameter. The pulley outside diameter is 82mm, and the shaft dimension is 25mm.

This alternator is described for use with Hitachi applications and is supplied under the OEX brand, which is sourced from original equipment manufacturers and aftermarket suppliers and made in ISO certified factories. Warranty coverage is listed as 3 years for passenger use and 1 year for commercial use.

Key Features

• 24V alternator, 40 amp output
• Hitachi style unit
• New unit, not remanufactured
• External regulator type
• Twin leg alternator mount
• BB pulley section

Specifications

• Part No.: HXA9402
• Brand: OEX
• Product Type: Alternator
• Voltage: 24V
• Power Rating: 40A
• New / Reman.: New
• Suits Unit Make: Hitachi
• Alternator Mount: Twin Leg

Fitment guidance

• Fitment is listed against ISUZU applications including E120, ELF, F/J Series, S Series and S/V Series.
• Fitment is also listed against KOBELCO LK350 applications.
• Sample applications provided include ISUZU E120 1975, ISUZU ELF 1981 to 1986, ISUZU F/J Series 1976 and 1977, and KOBELCO LK350 1983.

Application and Buying Notes

Before buying, confirm that your vehicle uses a 24V charging system and an alternator in Hitachi style with an external regulator. This unit is not a universal alternator, and the listed dimensions need to line up with the original mounting points, especially the 70mm inside mounting legs and 190mm centre to centre measurement.

Check the pulley and shaft details carefully. The pulley section is BB, the pulley outside diameter is 82mm, and the shaft dimension is 25mm. If the belt profile, pulley width, or shaft fit does not match the removed unit, the alternator will not be a correct direct replacement even if the vehicle family appears in the fitment list.

The mounting hardware points also matter. The adjusting hole diameter is 12mm and the pivot hole diameter is 14.5mm, so these should be checked against the original alternator and bracket arrangement. The unit is a twin leg mount and is listed as having no insulated return, which are both important electrical and physical checks on older commercial and industrial applications.

For buyers working on ISUZU or KOBELCO applications, part number matching is the safest way to confirm the correct alternator. The listed part number is HXA9402, and the product description identifies it as an OEX 24V 40A Hitachi style alternator. If the vehicle history is uncertain, compare the removed unit, mounting pattern, and regulator arrangement before ordering.

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 HXA9402 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 70mm, Power Rating (Amp) 40, Pulley Section BB, Suits Unit Make Hitachi, Alternator Mount Twin Leg, New / Reman. New, Shaft Dimension 25.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. HXA9402, Brand OEX, Description OEX Alternator 24V 40A Hitachi Style, Adjusting Hole Diameter 12, Pivot Hole Diameter 14.5, Pulley Outside Diameter 82mm, Regulator Type External, Voltage 24, Mount Cnt to Cnt 190mm.

OEX Alternator 24V 40A Hitachi Style. Part number HXA9402 should be checked first. Listed voltage is 24. Listed output rating is 40. These details form the core reference points used by parts interpreters when confirming the correct replacement.

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

For part number HXA9402, 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 24 and output 40 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include ISUZU E120, ISUZU E120 1975, ISUZU ELF, ISUZU ELF 1981, KOBELCO LK350, KOBELCO LK350 1983. 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.

The listed warranty is 3yr Passenger 1yr Commercial. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Confirm compatibility by matching part number HXA9402, 24V system requirement, Hitachi style application, external regulator setup, and the listed mounting dimensions against the original unit before purchase.

FAQ

What is the part number for this alternator?

The part number listed is HXA9402.

What voltage and amperage is this alternator?

It is a 24V alternator rated at 40A.

Is this alternator new or remanufactured?

It is listed as new, not remanufactured.

What type of regulator does it use?

It uses an external regulator.

What vehicles are listed in the fitment data?

Fitment is listed for ISUZU applications including E120, ELF, F/J Series, S Series and S/V Series, and for KOBELCO LK350 applications.

What should I check before ordering?

Check the 24V system requirement, Hitachi style application, external regulator setup, twin leg mount, and the listed dimensions including 70mm inside mounting legs, 190mm mount centre to centre, 12mm adjusting hole diameter, and 14.5mm pivot hole diameter.