This alternator is built for Ford and New Holland tractors and industrial equipment across the 1975-1993 range, engineered to OEM specifications for a direct fit and function replacement across more than 190 tractor models.
It delivers a 51 amp output at 12 volts, uses a field diode type circuit, and comes fitted with a 1-V pulley (88.9mm OD) for Ford-pattern applications. It is externally regulated with an external fan (ER/EF) and uses clockwise rotation, following the original charging system layout used on this equipment.
Key Features
- Built for Ford & New Holland tractor and industrial applications
- 12 volt, 51 amp output
- Field diode type circuitry
- 1-V pulley fitted, 88.9mm OD
- Externally regulated with external fan (ER/EF)
Technical Specs
| Specification |
Detail |
| Voltage |
12V |
| Amperage |
51A |
| Rotation |
Clockwise (CW) |
| Pulley Type |
1-V, 88.9mm OD |
| Fan Type |
External (EF) |
| Regulator Type |
External (ER) |
| Diode Type |
Field |
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 |
| Ford 340B, 345C, 445 Series, 540 Series, 545 Series & 550 Tractors |
1975-1993 |
| Ford A62, A64 & A66 Industrial Tractors |
1975-1993 |
| New Holland 2310-4610 Series Tractors (2310, 2600, 2610, 2810, 2910, 3600, 3610, 3900, 3910, 4100, 4110, 4600 & 4610) |
1975-1993 |
| New Holland 5610, 6610 & 7710 Tractors |
1975-1993 |
| New Holland Utility Tractors (230A, 231-234, 250C, 333-335, 340, 345C, 420, 445-450, 515, 530A & 531-535) |
1975-1993 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| 7377 |
Lester |
| 7378 |
Lester |
| 8AL2055F |
Motorola |
| 8AL2055FA |
Motorola |
| 8AL2056K |
Motorola |
| 8AL2056KA |
Motorola |
| D5NN-10300-A to -ER series |
Ford |
| 110-536 |
Prestolite |
| 110-544 |
Prestolite |
| 50203 |
Remy |
| 50204 |
Remy |
| 90-05-9076 |
Wilson |
| 90-05-9114 |
Wilson |
Frequently Asked Questions
Will this fit without modification?
Yes, this alternator is built to OEM specifications for a direct, bolt-in fit across the covered Ford and New Holland tractor and industrial applications.
What's included?
You receive one fully assembled 12V 51A alternator with pulley fitted, ready to install.
How do I know my old alternator has failed?
Common signs include a charge warning light staying on with the engine running, dimming or flickering lights, a battery that will not hold charge overnight, or an unusual whining or grinding noise from the unit as it turns.
Does this fit Massey Ferguson tractors too?
This unit is confirmed for the Ford and New Holland models listed above. If fitting to a Massey Ferguson application, please check the OEM part number on your original alternator against the cross reference table first.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
