Alternator for John Deere Skidder 640H 748H 848H & Combine 9540 9560 9580
Alternator for John Deere Skidder 640H 748H 848H & Combine 9540 9560 9580
SKU:400-24032
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Alternator for John Deere Skidder 640H 748H 848H & Combine 9540 9560 9580
Replaces Bosch 0120484027 - John Deere skidder, combine, tractor and marine applications
This alternator is supplied as a direct replacement for the original equipment unit on John Deere skidders, combines and tractors, and on Case and John Deere marine engine applications. It replaces Bosch 0120484027 and John Deere AH165975. It is a high-output alternator with an internal regulator (IR) and external fan (EF) cooling.
It is manufactured to OEM specifications, with an 8mm battery stud, W-terminal spade connection, 51mm bottom mount and a threaded top ear, so it bolts straight into the original bracket without modification.
Key Features
- Fits John Deere Skidder 640, 640H, 648, 648H, 748, 748H and 848H
- Fits John Deere Combine 9540, 9560 and 9580
- Replaces Bosch 0120484027 and John Deere AH165975
- 12-volt charging output
- 120 amp rated alternator
- 8mm battery stud, W-terminal spade
- 51mm bottom mount, threaded top ear
- Internal regulator (IR), external fan (EF)
Technical Specs
| Specification | Detail |
|---|---|
| Voltage | 12V |
| Amperage | 120A |
| Battery Stud | 8mm |
| Terminal | W-terminal spade |
| Bottom Mount | 51mm |
| Top Ear | Threaded |
| 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 Skidder 640, 640H, 648, 648H, 748, 748H, 848H | Not specified by supplier |
| John Deere Combine 9540, 9560, 9580 | Not specified by supplier |
| John Deere Marine Engine 4039DFM (Code 3113) | Not specified by supplier |
| John Deere Tractors | 2004-2007 |
| Case Tractor Applications | Not specified by supplier |
OEM Part Number Cross Reference
Aftermarket replacement. OEM part numbers are listed for reference only.
| Part Number | Manufacturer / Brand |
|---|---|
| 0120484027 | Bosch |
| AH165975 | John Deere |
| 220-386B, 400-24032 | J&N Electrical / Arrowhead |
Frequently Asked Questions
Will this fit my machine without modification?
Yes, this alternator is manufactured to OEM specifications for direct bolt-in fitment - check the mounting and terminal details above against your original unit.
How do I confirm this is the right part?
The quickest check is the number on your existing alternator. Bosch 0120484027 and John Deere AH165975 both supersede to this unit.
What is included?
One new 120 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 mounting and terminal configuration does this unit use?
An 8mm battery stud, W-terminal spade connection, 51mm bottom mount and a threaded top ear.
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