Alternator for John Deere Lawn & Utility Tractors 1986-1997
Alternator for John Deere Lawn & Utility Tractors 1986-1997
SKU:400-58013
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Alternator for John Deere Lawn & Utility Tractors 1986-1997
John Deere Lawn Tractors, Mowers & Utility Tractors - 12V 20A
This permanent magnet alternator is a direct replacement across a wide range of John Deere lawn tractors, mowers and utility tractors built between 1986 and 1997, engineered to OEM specifications for fit and function. It is designed to bolt straight into the existing mounting points without modification.
It is rated at 12 volts and 20 amps, and shares its design lineage with Komatsu/Yanmar-built units used across this John Deere range, so it installs as a like-for-like replacement. Because this alternator covers such a broad model range, we recommend checking the OEM cross-reference table below against your existing unit before ordering.
Key Features
- 12-Volt, 20 Amp permanent magnet alternator
- Direct OEM fit across the John Deere lawn & utility tractor range
- Wide model coverage - see fitment table below
- 12-month warranty as standard
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Amperage | 20A |
| Type | Permanent Magnet Alternator |
| Lester Reference | 10939 |
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 F915 Mower | 1986 onwards |
| John Deere 2210 / 2500 / 2653 Mowers | Not specified by supplier |
| John Deere 415 / 425 / 445 / 455 Lawn Tractors | 1993-1997 |
| John Deere X475 / X485 / X575 / X585 Lawn Tractors | Not specified by supplier |
| John Deere X700 / X720 / X724 / X728 / X729 / X748 Lawn Tractors | Not specified by supplier |
| John Deere 1070 Utility Tractor | 1989-1996 |
| John Deere 2305 / 2320 / 2520 Utility Tractors | Not specified by supplier |
| John Deere 4010 / 4100 / 4110 / 4115 Utility Tractors | Not specified by supplier |
| John Deere 670 / 770 / 870 Utility Tractors | 1989-1996 |
| John Deere 790 / 970 / 990 Utility Tractors | 1989-1995 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| AM877557 | John Deere |
| AM879144 | John Deere |
| CH15587 | John Deere |
| MIA10338 | John Deere |
| SE501822 | John Deere |
| SE801843 | John Deere |
| 129150-77201 | Yanmar |
| 129150-77202 | Yanmar |
| 124190-77201 | ASV |
| 10939 | Lester |
Frequently Asked Questions
Will this alternator fit my John Deere tractor without modification?
Yes, this is a direct OEM-fit replacement built to the original specification, so no modification is required for installation - it uses the same mounting points as the unit it replaces.
What's included?
You will receive one complete alternator unit, ready to fit. Your existing pulley, belt and wiring connector should be reused as normal.
How can I tell my old alternator has failed?
Common signs include a battery warning light on the dash, dimming or flickering lights, or a battery that will not hold charge even after a full charge cycle.
My tractor isn't listed exactly - will this still fit?
This alternator covers a wide range of John Deere models sharing the same OEM part numbers; please compare the OEM number on your existing alternator against the cross-reference table above to confirm compatibility before ordering.
What output does this alternator produce?
It is rated at 12 volts and 20 amps, matching the original permanent magnet unit fitted across this John Deere range.
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