How do I confirm pilotpart100386-A fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

12V 40A Alternator AM878581 AM880733 for John Deere 577 Baler 4475 5575 Skid Steer Loaders

For John Deere Alternator

Alternator AM878581 for John Deere Yanmar 3TNE84 Engine

OEM / REF: AM878581SKU: pilotpart100386-A

12V 40A Alternator AM878581 AM880733 for John Deere 577 Baler 4475 5575 Skid Steer Loaders is a Alternator replacement part indexed for John Deere 557 and John Deere 4475 · Yanmar 3TNE84, with 3 application records on file. Match OEM part number AM878581 and confirm fitment for John Deere Engine Spare Parts before o...

Stock: In stock
Condition: New
Fitment: John Deere Engine Spare Parts
Category: Alternator

Fitment support before you order
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In stock — ready to order

$146.05USD/EA

~~$17,587.00~~Save 99%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Oct 22 – Oct 29
10	Oct 20 – Oct 27
50	Oct 18 – Oct 25

Estimates from today; confirm exact lead time before payment.

Quantity

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Alternator Description

This Alternator is indexed for John Deere 557; John Deere 4475 · Yanmar 3TNE84; John Deere 5575 · Yanmar 3TNE88. Compare reference number AM878581 against the label on your existing John Deere component before ordering.

Additional cross references on file: AM880733. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

AM878581 AM880733

Applications

John Deere 557
John Deere 4475 · Yanmar 3TNE84
John Deere 5575 · Yanmar 3TNE88

Specifications

Voltage	12V
Ampere	40A
Part Number (John Deere)	AM878581, AM880733
Part Number	John Deere: AM878581, AM880733

Fitment Notes

Brand or application signal: John Deere Engine Spare Parts
Product family: Alternator
System category: Engine Spare Parts > Engine Auxiliary Components > Alternator
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.