Alternator for Zetor 3321 4321 5321 6321 7320 Tractors - 12V 70A
Alternator for Zetor 3321 4321 5321 6321 7320 Tractors - 12V 70A
SKU:400-42003
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Alternator for Zetor Tractors
Fits Zetor 3321 to 10541 Tractors - 12V 70A, IR/EF
This alternator is built to OEM specifications as a direct fit-and-function replacement for the Magneton unit fitted to Zetor tractors, covering the 3321, 4321, 5321, 6321, 7320, 8520, 9540 and 10540 families. It bolts onto the original mounting points with no modification required.
It is a 12-volt, 70-amp unit with an internal regulator (IR) and external fan (EF), turning clockwise on a solid 73.7mm (2.902 in) pulley and wired for negative earth - exactly as the factory unit. Fitting follows the same steps as removing and refitting the original, using a standard socket set.
Key Features
- 12-volt, 70-amp output
- Internal regulator (IR), external fan (EF)
- Clockwise (CW) rotation, negative earth
- Solid pulley, 73.7mm (2.902 in) diameter
- Direct replacement for Magneton 443-113-516-670
- 12-month warranty as standard
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Amperage | 70A |
| Rotation | Clockwise (CW) |
| Regulator | Internal (IR) |
| Fan Type | External (EF) |
| Pulley | Solid, 73.7mm (2.902 in) |
| Polarity | Negative earth |
Vehicle Fitment Guide
Years shown are the overall coverage span for this part. Please confirm against the OEM part number on your original unit before ordering.
| Make & Model | Years |
|---|---|
| Zetor 3321, 3341, 4321, 4341 | All years |
| Zetor 5321, 5341, 6321, 6341 | All years |
| Zetor 7320, 7321, 7341, 7520 | All years |
| Zetor 8520, 8540, 8621, 8641 | All years |
| Zetor 9520, 9540, 9641, 10540, 10541 | All years |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 443-113-516-670, 443-113-516-673, 9516673 | Magneton |
| 53-530-906 | Zetor |
| LRA01654 | Lucas Electrical |
| 12554 | Lester |
| 400-42003 | Arrowhead / J&N |
Frequently Asked Questions
Will this alternator fit without modification?
Yes, it is a direct OEM-spec replacement matching the original mounting, pulley and output of the Magneton unit fitted to Zetor tractors.
Which Zetor models does it cover?
The 3321 through 10541 ranges, including the 4321, 5321, 6321, 7320, 7520, 8520, 8641, 9540 and 9641. Please check the number on your existing alternator against the cross reference table above.
What's included?
One new alternator unit, ready to fit.
How do I know my old alternator has failed?
Signs include a battery that won't hold charge, a charge warning light, or dimming lights at idle.
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