How do I confirm pilotpart519891 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

V Ribbed Belt 3289056 for Cummins Engine ISB QSB 4B3.9 6B5.9 6C8.3 ISB4.5 QSB4.5 QSB5.9 QSC8.3 QSL9

For Cummins Belt

Belt 4B3.9 for Cummins

Q: What part numbers are associated with this Belt?

4B3.9, 6B5.9, 6C8.3, G5.9, 3289056

OEM / REF: 4B3.9SKU: pilotpart519891

V Ribbed Belt 3289056 for Cummins Engine ISB QSB 4B3.9 6B5.9 6C8.3 ISB4.5 QSB4.5 QSB5.9 QSC8.3 QSL9 is a Belt replacement part for Cummins Seals, Filters & Maintenance Parts, categorized under Seals, Filters & Maintenance Parts > Belt. Use OEM part number 4B3.9 and confirm machine model, engine model, and serial det...

Stock: In stock
Condition: New
Fitment: Cummins Seals, Filters & Maintenance Parts
Category: Belt

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$50.00USD/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

Confirm fitment before ordering →

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

Belt Description

This listing helps buyers source a Belt for Cummins Seals, Filters & Maintenance Parts by OEM number 4B3.9, SKU pilotpart519891, and Seals, Filters & Maintenance Parts > Maintenance Components > Belt category filters.

Additional cross references on file: 6B5.9, 6C8.3, G5.9. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

4B3.96B5.96C8.3G5.93289056

Fitment Notes

Brand or application signal: Cummins Seals, Filters & Maintenance Parts
Product family: Belt
System category: Seals, Filters & Maintenance Parts > Maintenance Components > Belt
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.