How do I confirm pilotpart392787 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

For Caterpillar Sprocket

Sprocket 139-4304 for Caterpillar

Q: What part numbers are associated with this Sprocket?

139-4304, 301.6, 301.6C, 301.8, 301.8C

OEM / REF: 139-4304SKU: pilotpart392787

Sprocket 139-4304 for Caterpillar CAT Engine 3003 Excavator 301.5 301.6 301.6C 301.8 301.8C is a Sprocket replacement part for Caterpillar Transmission & Undercarriage Parts, categorized under Transmission & Undercarriage Parts > Sprocket. Use OEM part number 139-4304 and confirm machine model, engine model, and ser...

Stock: In stock
Condition: New
Fitment: Caterpillar Transmission & Undercarriage Parts
Category: Sprocket

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$157.00USD/EA

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

Buy online now or add to your quote list for bulk pricing and fitment confirmation.

Confirm fitment before ordering →

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

Sprocket Description

This Sprocket is indexed for Caterpillar s: Fit For Caterpillar CAT Excavator: 301.5, 301.6, 301.6C, 301.8, 301.8C. Compare reference number 139-4304 against the label on your existing Caterpillar component before ordering.

Additional cross references on file: 301.6, 301.6C, 301.8. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

139-4304301.6301.6C301.8301.8C

Applications

Caterpillar s: Fit For Caterpillar CAT Excavator: 301.5, 301.6, 301.6C, 301.8, 301.8C

Fitment Notes

Brand or application signal: Caterpillar Transmission & Undercarriage Parts
Product family: Sprocket
System category: Transmission & Undercarriage Parts > Crawler Undercarriage Parts > Sprocket
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.