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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £4.99 | 1 to 2 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 5 to 7 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £9.95 | 7 to 10 working days |
Product Number: 12253N
The WAI 12253N is a brand-new 24V 15A alternator. It is built to Nikko IR/EF specification, replacing original-equipment numbers including Universal UNA147 and Komatsu 600-821-3840. Designed for heavy plant and earthmoving machinery, it covers 52 Komatsu applications across a broad range of dozer and excavator models.
Constructed to IR/EF (internally regulated, externally fan-cooled) design, the 12253N delivers a clockwise rotation output at 15 amperes on a 24-volt system — the configuration found across Komatsu's legacy plant fleet. Being brand new, it requires no core exchange and arrives ready to fit without the uncertainty of a remanufactured unit.
The alternator is cross-referenced against 15 OE and OEM references from Nikko, Komatsu, and Universal, giving buyers confidence that this is the correct replacement regardless of which number they originally sourced the part by.
About PartsForMachines:
PartsForMachines is a premier e-commerce platform, founded in 2019 in Warwickshire, UK, specializing in aftermarket parts and services for construction, agriculture, and industrial machinery. We offer an extensive catalog of over 500,000 products. Standard delivery: 1–3 working days within UK mainland. We are proud to be an authorised distributor, giving customers extra confidence when purchasing genuine products from us. In addition, we provide a 30-day return policy for eligible items.
| Type | Alternator |
|---|---|
| Manufacturer | Nikko |
| Design | IR/EF |
| Voltage | 24V |
| Output | 15A |
| Rotation | CW |
| Condition | Brand New |
| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
|---|
Exploring the WAI Starter Motor and Alternator at Partsformachines.com Introduction: In the Plant and Agriculture sector, a starter motor and alternator are parts that ensure a machine runs smoothly. At Partsformachines.com we have partnered with WAI, a global manufacturer of auto and plant machinery parts to off...
Standard Delivery: £4.99
Delivery Estimate: 1 to 2 working days
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| Technical Specification | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| PRODUCT NUMBER | 14482N | 20539N | 21610N | 23853N | 21173N | 22155N | 23791N | 8440N | A4033 | A4058 | A4072 | A4084 | A4085 | A4103 | A9012 |
| Voltage | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 | 12 |
| Output Current | 120 | 124 | 90 | 90 | 110 | 90 | 100 | 105 | 70 | 80 | 70 | 85 | 110 | ||
| Design | IR/IF | IR/IF | IR/IF | IR/IF | IR/IF | IR/IF | |||||||||
| Manufacturer | Marelli | Marelli | Electroprecizia | VISTEON | Marelli | Ford | Mando | Ford | |||||||
| Pulley | COUPLER | S6 | S6 | SC7 | S6 | AP | AP | AP | AP | AP | AP | ||||
| Rotation | CW | CW | CW | CW | |||||||||||
A. The WAI 12253N replaces original-equipment alternators referenced as Universal UNA147, Komatsu 600-821-3840, 600-821-3850, and 600-821-3860, among 15 OE references in total from Nikko, Komatsu, and Universal. It covers 52 Komatsu applications, including the D20, D21, D31, D37, D40, D41, E70Z, and E70ZS models. Use the selection widget to match your exact make, model, and engine variant, or search our cross-referenced catalogue by OEM number. Every fitment shown is backed by our Fit Guarantee.
A. Yes — Universal UNA147 is one of the 15 OE cross-references listed for the WAI 12253N. If you have sourced this part by that number, the 12253N is the catalogued replacement. Search our cross-referenced catalogue or use the selection widget to confirm fit for your specific machine.
A. The WAI 12253N is a 24-volt, 15-amp alternator built to Nikko IR/EF (internally regulated, externally fan-cooled) design with clockwise rotation. It is supplied brand new — not remanufactured.
A. Confirmed Komatsu fitments include the D20 (1988–1995), D21 (1988–1995), D31 (1988–1995), D37 (1995-on), D40 (1986–1995), D41 (1986–1995), E70Z (1991–1995), and E70ZS (1991–1995), among 52 Komatsu applications in total. Use the selection widget with your model and engine code to verify your specific variant.
A. Yes. Every vehicle and OE cross-reference shown for this part is checked against manufacturer data and backed by our Fit Guarantee. If it is not right, our Fit Guarantee or hassle-free returns have you covered.
A. Use the selection widget to match your make, model and engine, or search our cross-referenced catalogue by OEM number, machine model or equivalent part across brands. If your vehicle is not listed, ask Simon. Every fitment shown is backed by our Fit Guarantee.
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