OEX Alternator 12V 40A Hitachi Style HXA075

The OEX Alternator HXA075 is a new 12V, 40A unit built in a Hitachi style configuration and supplied with an internal regulator. It is listed as a twin leg alternator mount with 154mm centre-to-centre mounting, 68mm inside mounting legs, and an 8mm pivot hole diameter, so those dimensions are worth checking carefully against the original unit before ordering.

This alternator is supplied as a new rotating electrical part, not a remanufactured unit, and it weighs 3.58kg. The pulley is an A section pulley with a 74mm outside diameter, and the shaft dimension is 15mm. Those physical details matter when you are matching the belt drive and mounting setup on machinery or vehicle applications that use this pattern.

The unit is described as a Hitachi-style alternator with a P terminal and an adaptor to suit HXK-18. The part number is HXA075 and the brand is OEX. If you are replacing an existing alternator, matching the part number, terminal arrangement, and mounting dimensions is the safest way to confirm you have the correct unit.

Key Features

• New 12V 40A alternator
• Internal regulator
• Has P terminal
• Adaptor to suit HXK-18
• Twin leg alternator mount
• Hitachi style unit

Specifications

• Part No.: HXA075
• Brand: OEX
• Voltage: 12V
• Power rating: 40A
• New / Reman.: New
• Regulator type: Internal
• Mount type: Twin leg
• Inside mounting legs: 68mm

Known application groups

• Daewoo Industrial DSL801
• Gehl 3635
• Gehl 3935
• John Deere 4400 Series
• John Deere 4475
• John Deere 5575
• John Deere 6675
• John Deere 7775

Application and Buying Notes

Before fitting, compare the alternator mounting layout on the old unit with the HXA075 dimensions: 68mm inside mounting legs, 154mm mount centre to centre, an 8mm pivot hole, and an M8 x 1.25 adjusting hole. These are the practical checkpoints that decide whether the alternator will physically sit in the bracket correctly.

The pulley setup also needs to match. This unit uses a 74mm outside diameter A section pulley with a 15mm shaft dimension, so confirm the belt section and pulley size on the application before purchase. If the pulley or belt profile does not match, the alternator may not be suitable even if the electrical rating is correct.

Because this alternator is rated at 12V and 40A, it suits applications that are designed for that charging output. The internal regulator and P terminal are important details to match against the original alternator and harness connections, especially where the machine or vehicle wiring expects a specific terminal arrangement.

The listed fitment groups include a range of equipment and vehicle applications, but the most reliable buying check is still the original part number and the physical measurements. If you already have the existing alternator in hand, compare the part number, mounting ears, pulley section, and terminal layout before confirming the order.

The warranty listed is 3 years for passenger use and 1 year for commercial use. That warranty detail is useful, but it does not replace fitment verification. A correct electrical rating alone is not enough if the mounting dimensions, pulley profile, or terminal style differ from the original unit.

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 HXA075 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 68mm, Pivot Hole Diameter 8, Pulley Outside Diameter 74mm, Regulator Type Internal, Voltage 12, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Weight 3.58kg, Product Group 1 ROTATING ELECTRICAL, Part No. HXA075, Brand OEX, Description OEX Alternator 12V 40A Hitachi Style, Adjusting Hole Diameter M8 x 1.25, Pin Code IR15, Power Rating (Amp) 40, Pulley Section A, Suits Unit Make Hitachi.

OEX Alternator 12V 40A Hitachi Style. Part number HXA075 should be checked first. Listed voltage is 12. 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 Internal. Pulley configuration is A. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number HXA075, 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 40 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Available application references include DAEWOO INDUSTRIAL DSL801, DAEWOO INDUSTRIAL DSL801 1997, GEHL 3635, GEHL 3635 2003, GEHL 3935, GEHL 3935 2004. 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 compatibility by matching the part number HXA075, the Hitachi-style unit make, the 12V 40A rating, and the mounting and pulley dimensions against your existing alternator and application details before ordering.

FAQ

What is the part number for this alternator?

The part number is HXA075.

What are the key electrical specifications?

It is a 12V alternator rated at 40A, with an internal regulator.

Is this a new or remanufactured alternator?

This unit is new.

What mounting details should I check before buying?

Check the twin leg mount, 68mm inside mounting legs, 154mm centre-to-centre mounting, 8mm pivot hole, and M8 x 1.25 adjusting hole.

What pulley details are listed?

It has a 74mm outside diameter pulley with an A section pulley profile and a 15mm shaft dimension.

Does it have any special terminal or adapter detail?

Yes. It has a P terminal and an adaptor to suit HXK-18.