Nikko Alternator 24V 90A NXA9734

The Nikko alternator listed here is a 24V, 90A unit for rotating electrical applications, supplied as a new alternator with an internal regulator. The part number is NXA9734, and the unit is described as an OE product. That combination of voltage, output, and part identification is the first check to make before ordering.

Physical mounting details matter just as much as electrical rating on this style of alternator. Key measurements supplied include 101mm inside mounting legs, 261mm mount centre to centre, M12x1.5 adjusting hole diameter, 13mm pivot hole diameter, and a twin leg alternator mount. The pulley is a B section design with a 95mm outside diameter.

This alternator is listed for Nikko units and is part of the alternator rotating electrical group. It weighs 19kg and is covered by a one year warranty. If you are matching an existing machine or replacing a failed alternator, confirm the part number, voltage, mounting pattern, and pulley section before fitting.

Key Features

• 24V alternator with 90A output
• New unit, not remanufactured
• Internal regulator type
• Twin leg alternator mount
• OE product
• B section pulley

Specifications

• Brand: Nikko
• Product type: Alternator
• Voltage: 24V
• Power rating: 90A
• Part number: NXA9734
• Regulator type: Internal
• New / remanufactured: New
• Alternator mount: Twin leg

Known application guidance

• KOBELCO SK850LC
• KOBELCO SK850LC 2010
• KOMATSU D155AX-5
• KOMATSU D155AX-6
• KOMATSU D275AX-5
• KOMATSU D275AX-5E0
• KOMATSU D355A-3
• KOMATSU D355A-3 2010

Application and Buying Notes

Before buying, compare the part number NXA9734, the 24V system requirement, and the 90A output against the unit you are replacing. Alternator output, regulator type, and pulley section all need to line up with the machine’s charging system, especially where the original unit is a Nikko unit with an internal regulator.

Mounting measurements are critical on this alternator. Check the 101mm inside mounting legs, 261mm centre to centre mount measurement, M12x1.5 adjusting hole, and 13mm pivot hole against the existing installation. Even if the machine model appears in the application list, a visual and measurement check is still the safest way to avoid a mismatch.

The pulley details also need attention. This alternator uses a B section pulley with a 95mm outside diameter, so belt profile and pulley size should be confirmed during replacement. On heavy equipment and other rotating electrical systems, a correct electrical match is not enough if the mounting or belt drive dimensions differ.

Because this is a new alternator rather than a remanufactured unit, it is supplied as a complete replacement item with a one year warranty. The 19kg weight also gives a practical sense of the unit size, which can help when comparing freight handling or checking against the removed part during inspection.

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 NXA9734 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 101mm, Power Rating (Amp) 90, Pulley Section B, Suits Unit Make Nikko, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. NXA9734, Brand NIKKO, Description Nikko Alternator 24V 90A, Adjusting Hole Diameter M12x1.5, Pivot Hole Diameter 13, Pulley Outside Diameter 95mm, Regulator Type Internal, Voltage 24, Mount Cnt to Cnt 261mm.

Nikko Alternator 24V 90A. Part number NXA9734 should be checked first. Listed voltage is 24. Listed output rating is 90. 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 NXA9734, 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 90 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm compatibility by matching part number NXA9734, 24V system voltage, 90A output, twin leg mounting, and the pulley and hole measurements against your existing unit before ordering.

FAQ

What is the part number for this alternator?

The part number supplied is NXA9734. For this listing, part number NXA9734 is the main reference point. Listed voltage is 24. Listed output rating is 90. Published fitment references include KOBELCO SK850LC, KOBELCO SK850LC 2010, KOMATSU D155AX-5. 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 90A power rating. For this listing, part number NXA9734 is the main reference point. Listed voltage is 24. Listed output rating is 90. Published fitment references include KOBELCO SK850LC, KOBELCO SK850LC 2010, KOMATSU D155AX-5. These details should still be checked against the original unit before ordering.

Is this a new or remanufactured unit?

This alternator is listed as new. For this listing, part number NXA9734 is the main reference point. Listed voltage is 24. Listed output rating is 90. Published fitment references include KOBELCO SK850LC, KOBELCO SK850LC 2010, KOMATSU D155AX-5. These details should still be checked against the original unit before ordering.

What regulator type does it use?

It uses an internal regulator. For this listing, part number NXA9734 is the main reference point. Listed voltage is 24. Listed output rating is 90. Published fitment references include KOBELCO SK850LC, KOBELCO SK850LC 2010, KOMATSU D155AX-5. These details should still be checked against the original unit before ordering.

What are the main mounting measurements?

The supplied mounting details are 101mm inside mounting legs, 261mm mount centre to centre, M12x1.5 adjusting hole diameter, and 13mm pivot hole diameter. For this listing, part number NXA9734 is the main reference point. Listed voltage is 24. Listed output rating is 90. Published fitment references include KOBELCO SK850LC, KOBELCO SK850LC 2010, KOMATSU D155AX-5. These details should still be checked against the original unit before ordering.

Which machines are listed in the application guide?

The provided application guide includes selected KOBELCO and KOMATSU machines, including KOBELCO SK850LC and KOMATSU models such as D155AX-5, D275AX-5E0, D355A-3, D375A-5E0, PC200, PC228US-8, WA250, and WA500-7. Confirm the full fitment against part number and measurements before purchase. For this listing, part number NXA9734 is the main reference point. Listed voltage is 24. Listed output rating is 90. Published fitment references include KOBELCO SK850LC, KOBELCO SK850LC 2010, KOMATSU D155AX-5. These details should still be checked against the original unit before ordering.