Nikko Alternator 24V 25A NXA9709

This Nikko alternator is a new 24V, 25A unit supplied each under part number NXA9709. It is a twin-leg mount alternator with an internal regulator, clockwise rotation and a BB pulley section, so the mounting style and electrical setup can be checked against the existing unit before ordering.

The listed mounting details are specific: inside mounting legs are 68mm, mount centre to centre is 169mm, the adjusting hole is M12x1.5, and the pivot hole diameter is 17mm. The pulley outside diameter is 95mm, and the unit is noted as no plug, which matters when comparing it with the vehicle’s wiring and connector arrangement.

This alternator is described as built to withstand the harshest environments and is suited to Nikko applications. Fitment data also lists Hyundai Construction and Komatsu applications, including machinery such as the 420LC, 450LC, Robex 420LC, Komatsu D20, D21A-8, D21P-8, D31-17, D31-18, D31-20, D31EX-21/PX-21, D37-5, D37EX-21/PX-21, D37P-2 and D39EX-21/PX-21, but the exact match still needs to be confirmed by part number and mounting details.

At 6.4kg, this is a substantial rotating electrical component, so it is worth checking the physical fit, belt alignment and electrical connection style before installation. The one-year warranty applies to the listed unit, and the 24V, 25A specification should be matched carefully to the machine’s charging requirements.

Key Features

• New alternator, supplied each
• 24V system with 25A output
• Internal regulator
• Twin-leg mount
• Clockwise rotation
• No plug connection

Specifications

• Part number: NXA9709
• Brand: Nikko
• Product type: Alternator
• Voltage: 24V
• Amperage: 25A
• New / remanufactured: New
• Mount type: Twin leg
• Inside mounting legs: 68mm

Verified application guidance

• Suited to Nikko applications.
• Fitment data also lists Hyundai Construction 420LC, 450LC and Robex 420LC.
• Fitment data also lists Komatsu equipment including D20, D21A-8, D21P-8, D31-17, D31-18, D31-20, D31EX-21/PX-21, D37-5, D37EX-21/PX-21, D37P-2 and D39EX-21/PX-21.
• Komatsu Compressor and Komatsu Engine applications are also referenced in the fitment data.
• Confirm the existing alternator part number, mount style, pulley section and connector style before ordering.

Application and Buying Notes

Before buying, compare the existing alternator against the listed NXA9709 measurements and connection details. The twin-leg mount, 68mm inside mounting legs, 169mm mount centre to centre, M12x1.5 adjusting hole, 17mm pivot hole and no plug configuration need to match the machine’s current setup for the best chance of a correct installation.

The 24V, 25A output is an important check for charging system compatibility. It is intended for equipment that uses a 24-volt electrical system, and the internal regulator means the control arrangement is built into the unit rather than relying on a separate external regulator.

Pulley and belt alignment should also be checked carefully. This alternator uses a BB pulley section and a 95mm pulley outside diameter, so matching the belt type and existing pulley dimensions matters, particularly on machinery where accessory drive alignment is critical.

If you are comparing alternatives, use the part number NXA9709 first, then verify the vehicle or equipment application, rotation direction and mounting pattern. The fact that it is listed for Nikko, Hyundai Construction and Komatsu applications is useful, but those application names should be treated as a guide rather than a blanket confirmation for every machine in those ranges.

The unit weighs 6.4kg and is supplied new, not remanufactured. For workshop planning, that weight and the rotating electrical nature of the part are worth noting when handling, fitting and checking belt tension after installation.

As with any alternator replacement, confirm the battery charging system, wiring condition and belt condition at the same time. A correct alternator will still underperform if the belt is worn, the cabling is damaged or the machine’s electrical system has another fault.

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 NXA9709 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 One Year, Inside Mounting Legs 68mm, Power Rating (Amp) 25, Pulley Section BB, Rotation CW, Voltage 24, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. NXA9709, Brand NIKKO, Description Nikko Alternator 24V 25A, Adjusting Hole Diameter M12x1.5, Pivot Hole Diameter 17, Pulley Outside Diameter 95mm, Regulator Type Internal, Suits Unit Make Nikko.

Nikko Alternator 24V 25A. Part number NXA9709 should be checked first. Listed voltage is 24. Listed output rating is 25. 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 BB. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

Compatibility note: Confirm fitment using part number NXA9709, the twin-leg mounting dimensions, 24V 25A rating, no-plug connection and the specific machine application before ordering. Application listings are a guide and should be checked against the existing unit on the machine.

FAQ

What is the part number for this alternator?

The part number is NXA9709.

Is this alternator new or remanufactured?

It is listed as new.

What voltage and output does it have?

It is a 24V alternator with a 25A power rating.

Does it have an internal regulator?

Yes. The regulator type is internal.

What type of mount does it use?

It uses a twin-leg mount, with 68mm inside mounting legs and 169mm mount centre to centre.

Which applications are listed for this alternator?

The fitment data lists Nikko applications, plus Hyundai Construction 420LC, 450LC and Robex 420LC, and Komatsu equipment including D20, D21A-8, D21P-8, D31-17, D31-18, D31-20, D31EX-21/PX-21, D37-5, D37EX-21/PX-21, D37P-2 and D39EX-21/PX-21.