Alternator for John Deere 1040 & 1120 Tractors 1970-1984
Alternator for John Deere 1040 & 1120 Tractors 1970-1984
SKU:400-24059
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Alternator for John Deere 1040 & 1120 Tractors 1970-1984
John Deere 1040 & 1120 Tractors, 1970-1984
This alternator is built for John Deere 1040 and 1120 tractors from the 1970-1984 model years, supplied as a direct replacement for the original equipment unit. It is a 12-volt, 55 amp alternator with a single V-pulley (87mm OD) and an unthreaded top ear, matching the original fitment.
It is manufactured to OEM specifications for output and mounting, with a 56mm bottom mount, an internal regulator (IR) and external fan (EF) cooling, so it bolts straight into the original bracket without modification.
Key Features
- 12-volt charging output
- 55 amp rated alternator
- 1-V pulley, 87mm OD
- 56mm bottom mount, unthreaded top ear
- Internal regulator (IR), external fan (EF)
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Amperage | 55A |
| Pulley Type | 1-V, 87mm OD |
| Bottom Mount | 56mm |
| Top Ear | Unthreaded |
| Regulator | Internal Regulator (IR) |
| Fan Type | External Fan (EF) |
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 |
|---|---|
| John Deere 1040 Tractor | 1970-1984 |
| John Deere 1120 Tractor | 1970-1984 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| AL28516 / AL35998 / AZ26910 / TY6652 / TY6791 | John Deere |
| 0-120-489-703 / 0-120-489-704 | Bosch |
| 13199 / 13193 | Lester |
| IA0453 / AAK1330 / AAK3328 / 11.201.453 / 11.201.929 | Iskra / Letrika |
| MG215 | Mahle |
| 9513021 | Magneton |
| S-35951 | Sparex |
| 110105 | Cargo |
Frequently Asked Questions
Will this fit my tractor without modification?
Yes, this alternator is manufactured to OEM specifications for direct bolt-in fitment on John Deere 1040 and 1120 tractors - check the pulley and mounting details above against your original unit.
What is included?
One new 12-volt, 55 amp alternator, ready to fit.
How do I know my old alternator has failed?
Common signs are a dashboard charge warning light, dimming or flickering lights, a weak or dead battery despite the engine running, or a whining/growling noise from the unit.
What pulley and mounting configuration does this unit use?
A 1-V pulley with an 87mm outer diameter, a 56mm bottom mount and an unthreaded top ear, matching the original equipment.
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