Alternator for John Deere Excavators, Graders & Feller Bunchers 1971-1995
24V 40A Delco 10SI-style alternator for John Deere excavators, graders, feller bunchers & Case IH wheel loaders
This Delco 10SI-style alternator is built for John Deere excavators, graders and feller bunchers, plus Case IH wheel loaders and Waukesha-engined equipment across the 1971-1995 range, engineered to OEM specifications for a direct fit and function replacement.
It runs at 24 volts with a 40 amp output, suited to the higher-voltage charging systems used on this class of heavy equipment. It uses clockwise rotation with the drive positioned at the 12 o'clock clock position, is internally regulated with an external fan (IR/EF), and includes a relay stud fitted on the rear housing for OE-style wiring of auxiliary circuits.
Key Features
- Delco 10SI-style design for direct OEM fit and function
- 24 volt, 40 amp output
- Internally regulated with external fan (IR/EF)
- Relay stud fitted on rear housing
- Covers John Deere excavators, graders, feller bunchers & Case IH loaders, 1971-1995
Technical Specs
| Specification |
Detail |
| Alternator Family |
Delco 10SI |
| Voltage |
24V |
| Amperage |
40A |
| Rotation |
Clockwise (CW) |
| Clock Position |
12 o'clock |
| Pulley Type |
1-V |
| Fan Type |
External (EF) |
| Regulator Type |
Internal (IR) |
| Mounting Note |
Relay stud fitted on rear |
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 Excavators (290D, 490, 590D, 690D, 790D, 892D & 992D) |
1971-1995 |
| John Deere Feller Bunchers (493D, 693D & 793D) |
1971-1995 |
| John Deere Graders |
1971-1995 |
| Case IH Wheel Loaders (Waukesha-engined) |
1971-1995 |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number |
Manufacturer / Brand |
| ADR0392 |
Arrowhead |
| L59901 |
Case |
| 1101285 |
Delco |
| 1102348 |
Delco |
| 400-12228 |
J&N |
| AT130930 |
John Deere |
| TY6752 |
John Deere |
| 7163 |
Lester |
| 7646 |
Lester |
| 1-2720-11DR |
WAI |
Frequently Asked Questions
Will this fit without modification?
Yes, this alternator is built to OEM specifications for a direct, bolt-in fit on covered John Deere excavator, grader and feller buncher applications, plus Case IH wheel loaders using the same Waukesha-based charging system.
What's included?
You receive one fully assembled 24V 40A Delco 10SI-style alternator, 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.
Is there a different version of this alternator?
Yes, an earlier 12SI-based version of this unit is also in circulation on some machines - check your original part's rating plate to confirm you need this 10SI-style version before ordering.
Dispatched from the UK · 12-month warranty · Fitment support from our technical team
