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| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
| SERVICE | DELIVERY PRICE | DELIVERY TIME |
|---|---|---|
| Standard Delivery | £19.95 | 7 to 10 working days |
Product Number: 66124001
The Highway Automotive 66124001 is a 12-volt, 40-amp replacement alternator designed to restore reliable charging performance across a range of John Deere compact and utility tractors. Supplied complete with belt pulley, it is ready to fit without the need for additional components and is built to maintain electrical system integrity in demanding agricultural operating conditions. The alternator operates at 12 V with a 40 A charging current, providing a consistent output suited to the electrical demands of the John Deere Series 3 and Series 4 tractor ranges. The single-groove belt pulley is included as part of the assembly, ensuring straightforward installation onto the existing drive arrangement. With a gross weight of 2.9 kg and a compact package of 180 × 200 × 160 mm, the 66124001 is sized to match the original alternator envelope on compatible machines. The unit covers 13 confirmed fitments across the John Deere Series 3 and Series 4 ranges, including the 3320, 3520, 4200, 4210, 4300, 4400, 4410, 4500, 4510, 4600, 4610, 4700, and 4710 models. This alternator is supplied by Highway Automotive, a specialist in agricultural and plant electrical components. The unit is sourced to match the original specification and is backed by the PartsForMachines Fit Guarantee for confirmed fitments.
| Gross weight | 2.9 kg |
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| Package (mm) | 180x200x160 |
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Notes: Voltage: 12 V; Charging current: 40 A; With belt pulley; Number of grooves: 1
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| Engine Parts | Product Number | Product Name | Recommended Units | Product Price |
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Standard Delivery: £19.95
Delivery Estimate: 7 to 10 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. Confirmed applications include the John Deere Series 4 4300, John Deere Series 4 4400, John Deere Series 4 4410, John Deere Series 3 3320, John Deere Series 4 4500, John Deere Series 4 4510, John Deere Series 3 3520 and John Deere Series 4 4600 — 13 listed applications in total. Check your model against the application list, use the selection widget, or search by OEM number before ordering.
A. The 66124001 operates at 12 volts with a charging current of 40 amps. It is supplied complete with a single-groove belt pulley, so no additional pulley is required for installation. The unit has a gross weight of 2.9 kg and is packaged at 180 × 200 × 160 mm.
A. The 66124001 fits John Deere Series 3 and Series 4 models, covering 13 confirmed applications including the 3320, 3520, 4200, 4210, 4300, 4400, 4410, 4500, 4510, 4600, 4610, 4700, and 4710. Use the selection widget to match your exact make, model, and engine variant, or search our cross-referenced catalogue by machine model. If your machine is not listed, ask Simon. Every fitment shown is backed by our Fit Guarantee.
A. Yes — the 66124001 is supplied with a belt pulley fitted as part of the assembly. The pulley features a single groove, matching the standard drive arrangement on compatible John Deere Series 3 and Series 4 tractors.
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.
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