Nikko Alternator 24V 50A NXA9721

The Nikko alternator listed here is a 24V, 50A unit, new and supplied each, with part number NXA9721. It uses an internal regulator and is described as brushless, which are both useful checkpoints when comparing against an existing alternator on the machine.

Mounting and pulley details matter on this unit: it has a twin leg alternator mount, 69mm inside mounting legs, a 14.5mm pivot hole diameter, a 12.5mm adjusting hole diameter, and a 82mm pulley outside diameter. The note also says to check pulley section, and that it suits a 13A type belt.

This alternator is listed under Nikko and suits Nikko units. The weight is 10.9kg, and the pin code is IR94. A one year warranty is stated, which gives a clear reference point when comparing replacement options for rotating electrical work.

Key Features

• 24V alternator with 50A output
• New unit supplied each
• Internal regulator
• Brushless design
• Twin leg alternator mount
• One year warranty

Specifications

• Brand: Nikko
• Part No.: NXA9721
• Voltage: 24V
• Power Rating: 50A
• Unit of Measure: Each
• Inside Mounting Legs: 69mm
• Pivot Hole Diameter: 14.5mm
• Adjusting Hole Diameter: 12.5mm

Verified fitment guidance

• Suits Nikko units
• No further vehicle model fitment is confirmed in the supplied product details

Application and Buying Notes

When matching this alternator, the safest checks are the 24V system, 50A output, and the physical mounting dimensions. The listed measurements are 69mm inside mounting legs, a 14.5mm pivot hole diameter, a 12.5mm adjusting hole diameter, and 225mm mount centre to centre, so it is important to compare those points against the alternator currently fitted.

The pulley information should also be checked carefully before ordering. This unit has an 82mm pulley outside diameter, AAA pulley section, and the note says it suits a 13A type belt. If the pulley section or belt type does not match the machine, the alternator may not be suitable even where the electrical rating appears similar.

The regulator is internal and the alternator is brushless, so it should be compared with the existing unit on both the electrical and mounting side. The part number NXA9721, pin code IR94, and Nikko application details are the most reliable identifiers available here. If the old unit is damaged or unreadable, measure the mounting points and pulley dimensions before placing an order.

This alternator is new and carries a one year warranty. For a commercial machine or equipment that works in harsh conditions, the stated build note is relevant, but it should still be treated as a replacement component that must match the original specifications. Confirm the machine’s charging system requirements before fitting, especially on 24V equipment where the incorrect unit can create charging issues.

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 NXA9721 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 69mm, Pivot Hole Diameter 14.5, Pulley Outside Diameter 82mm, Regulator Type Internal, Voltage 24, Alternator Mount Twin Leg, New / Reman. New.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. NXA9721, Brand NIKKO, Description Nikko Alternator 24V 50A, Adjusting Hole Diameter 12.5, Pin Code IR94, Power Rating (Amp) 50, Pulley Section AAA, Suits Unit Make Nikko.

Nikko Alternator 24V 50A. Part number NXA9721 should be checked first. Listed voltage is 24. Listed output rating is 50. 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 AAA. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number NXA9721, 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 50 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment by checking part number NXA9721, the 24V 50A specification, and the mounting and pulley dimensions against the existing alternator before purchase. Suits Nikko units only as stated, and no other application should be assumed without a direct match.

FAQ

What is the part number for this alternator?

The part number listed is NXA9721. For this listing, part number NXA9721 is the main reference point. Listed voltage is 24. Listed output rating is 50. Published fitment references include CASE CX290B, CASE CX290B 2007, CASE CX300C. 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 50A power rating. For this listing, part number NXA9721 is the main reference point. Listed voltage is 24. Listed output rating is 50. Published fitment references include CASE CX290B, CASE CX290B 2007, CASE CX300C. These details should still be checked against the original unit before ordering.

Is the regulator internal or external?

This alternator has an internal regulator. For this listing, part number NXA9721 is the main reference point. Listed voltage is 24. Listed output rating is 50. Published fitment references include CASE CX290B, CASE CX290B 2007, CASE CX300C. These details should still be checked against the original unit before ordering.

What mounting style does it use?

It uses a twin leg alternator mount, with 69mm inside mounting legs and a 225mm mount centre to centre measurement. For this listing, part number NXA9721 is the main reference point. Listed voltage is 24. Listed output rating is 50. Published fitment references include CASE CX290B, CASE CX290B 2007, CASE CX300C. These details should still be checked against the original unit before ordering.

Does it suit a particular belt or pulley type?

The note says to check pulley section and states it suits a 13A type belt. The pulley section is AAA and the pulley outside diameter is 82mm. For this listing, part number NXA9721 is the main reference point. Listed voltage is 24. Listed output rating is 50. Published fitment references include CASE CX290B, CASE CX290B 2007, CASE CX300C. These details should still be checked against the original unit before ordering.

What warranty is stated?

A one year warranty is stated for this alternator. For this listing, part number NXA9721 is the main reference point. Listed voltage is 24. Listed output rating is 50. Published fitment references include CASE CX290B, CASE CX290B 2007, CASE CX300C. These details should still be checked against the original unit before ordering.