Nikko Alternator 24V 25A NXA609

The Nikko alternator listed here is a 24V, 25A unit under part number NXA609. It is supplied new, weighs 6.24kg, and uses an internal regulator, which are all useful checkpoints when matching a replacement for the correct charging system setup.

This alternator is built with a twin leg mount, 171mm mount centre to centre, 71mm inside mounting legs, an M12x1.5 adjusting hole, and a 14mm pivot hole. The pulley is 8 groove with an 80mm outside diameter, so pulley style and mounting dimensions should be confirmed before ordering.

The stated application is to suit Komatsu PC100-E with S6D125 engine. Fitment data also includes a wider Komatsu application range, but the safest approach is to match the part number, voltage, amperage, mount style, and pulley details against the original unit already fitted to the machine.

Key Features

• 24V charging system
• 25 amp power rating
• New unit
• Internal regulator
• Twin leg alternator mount
• 8 groove pulley

Specifications

• Brand: Nikko
• Product type: Alternator
• Voltage: 24V
• Power rating: 25A
• Part number: NXA609
• New / remanufactured: New
• Regulator type: Internal
• Alternator mount: Twin leg

Verified fitment guidance

• Suits Komatsu PC100-E with S6D125 engine
• Fitment data also references Komatsu applications beyond the PC100-E listing
• Komatsu-related fitment coverage appears in the provided application data, but the exact vehicle or machine match should still be confirmed against the original alternator

Application and Buying Notes

Before buying, check the existing alternator for part number NXA609, 24V system voltage, 25A output, and the same twin leg mounting style. The mounting dimensions are specific: 171mm mount centre to centre, 71mm inside mounting legs, 14mm pivot hole, and M12x1.5 adjusting hole.

Pulley details matter on alternators like this one. The unit is listed with an 8 groove pulley and an 80mm outside diameter, so the belt arrangement on the machine needs to match. If the belt count, pulley diameter, or shaft interface is different on the current alternator, the part may not be a direct replacement.

This alternator is described as new and fitted with an internal regulator, which is important when comparing against older or different charging system designs. The weight is 6.24kg, and while that does not determine fitment on its own, it can help confirm you are comparing the same style of unit when checking against the removed part.

The main verified application is Komatsu PC100-E with S6D125 engine. There is also broader Komatsu application data in the fitment information, but it should be treated as a check list rather than a guarantee. Confirm the machine model, engine, mounting points, pulley count, and electrical specification before placing the order.

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 NXA609 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 71mm, Power Rating (Amp) 25, Pulley Section 8 Groove, Suits Unit Make Nikko, Alternator Mount Twin Leg, New / Reman. New, Weight 6.24kg.

Additional published details for cross-checking include Product Group 1 ROTATING ELECTRICAL, Part No. NXA609, Brand NIKKO, Description Nikko Alternator 24V 25A, Adjusting Hole Diameter M12x1.5, Pivot Hole Diameter 14, Pulley Outside Diameter 80mm, Regulator Type Internal, Voltage 24, Mount Cnt to Cnt 171mm.

Nikko Alternator 24V 25A. Part number NXA609 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 8 Groove. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number NXA609, 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 25 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Please confirm compatibility using part number NXA609, 24V system voltage, 25A output, twin leg mount dimensions, and the 8 groove pulley details before purchase. Where machine history is unclear, compare the removed alternator against the listed application data rather than relying on model name alone.

FAQ

What is the part number for this alternator?

The listed part number is NXA609. For this listing, part number NXA609 is the main reference point. Listed voltage is 24. Listed output rating is 25. Published fitment references include KOMATSU COMPRESSOR, KOMATSU D31-18, KOMATSU D31-20. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 24V alternator with a 25A power rating. For this listing, part number NXA609 is the main reference point. Listed voltage is 24. Listed output rating is 25. Published fitment references include KOMATSU COMPRESSOR, KOMATSU D31-18, KOMATSU D31-20. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

It is listed as new. For this listing, part number NXA609 is the main reference point. Listed voltage is 24. Listed output rating is 25. Published fitment references include KOMATSU COMPRESSOR, KOMATSU D31-18, KOMATSU D31-20. These details should still be checked against the original unit before ordering.

What machine is it stated to suit?

It is stated to suit Komatsu PC100-E with S6D125 engine. For this listing, part number NXA609 is the main reference point. Listed voltage is 24. Listed output rating is 25. Published fitment references include KOMATSU COMPRESSOR, KOMATSU D31-18, KOMATSU D31-20. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an internal regulator. For this listing, part number NXA609 is the main reference point. Listed voltage is 24. Listed output rating is 25. Published fitment references include KOMATSU COMPRESSOR, KOMATSU D31-18, KOMATSU D31-20. These details should still be checked against the original unit before ordering.

What mounting and pulley details should be checked?

Check the twin leg mount, 171mm mount centre to centre, 71mm inside mounting legs, 14mm pivot hole, M12x1.5 adjusting hole, and the 8 groove pulley with 80mm outside diameter. For this listing, part number NXA609 is the main reference point. Listed voltage is 24. Listed output rating is 25. Published fitment references include KOMATSU COMPRESSOR, KOMATSU D31-18, KOMATSU D31-20. These details should still be checked against the original unit before ordering.