How do I confirm pilotpart204917 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

Alternator Engine Fan C3904981 3904981 for Cummins Engine 4B B3.9 8V 6B5.9

For Cummins Fan

Fan C3904981 for Cummins

Q: What part numbers are associated with this Fan?

C3904981, 3904981, B3.9, 6B5.9, 6C8.3, B4.5, G5.9, J904981

OEM / REF: C3904981SKU: pilotpart204917

Alternator Engine Fan C3904981 3904981 for Cummins Engine 4B B3.9 8V 6B5.9 is a Fan replacement part indexed for Part Number and Cummins s : 4B 4B3.9, 6B5.9, 6C8.3, B3.9 G, B4.5, B5.9 G, C8.3 G, G5.9, ISB CM550, ISC CM2150, ISL CM2150, N14 CELECT, QSB4.5 30 CM550, QSB4.5 CM850(CM2850), QSB5.9 44 CM550, QSL9 CM850(CM...

Stock: In stock
Condition: New
Fitment: Cummins HVAC Parts
Category: Fan

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$125.43USD/EA

~~$31,599.00~~Save 100%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Oct 23 – Oct 30
10	Oct 21 – Oct 28
50	Oct 19 – Oct 26

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.

Fan Description

This Fan is indexed for Part Number; Cummins s : 4B 4B3.9, 6B5.9, 6C8.3, B3.9 G, B4.5, B5.9 G, C8.3 G, G5.9, ISB CM550, ISC CM2150, ISL CM2150, N14 CELECT, QSB4.5 30 CM550, QSB4.5 CM850(CM2850), QSB5.9 44 CM550, QSL9 CM850(CM2850). Compare reference number C3904981 against the label on your existing Cummins component before ordering.

Additional cross references on file: 3904981, B3.9, 6B5.9. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

C3904981 3904981B3.96B5.96C8.3B4.5G5.9J904981

Applications

Part Number
Cummins s : 4B 4B3.9, 6B5.9, 6C8.3, B3.9 G, B4.5, B5.9 G, C8.3 G, G5.9, ISB CM550, ISC CM2150, ISL CM2150, N14 CELECT, QSB4.5 30 CM550, QSB4.5 CM850(CM2850), QSB5.9 44 CM550, QSL9 CM850(CM2850)

Specifications

Part Number	C3904981, 3904981

Fitment Notes

Brand or application signal: Cummins HVAC Parts
Product family: Fan
System category: HVAC Parts > Cooling System Components > Fan
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.