How do I confirm pilotpart184295 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

Belt Tensioner 3937556 for Cummins 4B3.9 6B5.9 ISBE CM800 QSB6.7 CM850 QSF2.8

For Cummins Belt Tensioner

Belt Tensioner 3911621 for Cummins

Q: What part numbers are associated with this Belt Tensioner?

3911621, Cummins4B3.9, 6B5.9, CM556, B4.5, B4.5S, B5.9, B6.7, CMOH6.0, B125, B6.7S, F3.8

OEM / REF: 3911621SKU: pilotpart184295

Belt Tensioner 3937556 for Cummins 4B3.9 6B5.9 ISBE CM800 QSB6.7 CM850 QSF2.8 is a Belt Tensioner replacement part indexed for Part Number and Cummins Cummins ISC ISB M923 M931 M936 M925 M939 Truck. Match OEM part number 3911621 and confirm fitment for Cummins Engine Spare Parts before ordering.

Stock: In stock
Condition: New
Fitment: Cummins Engine Spare Parts
Category: Belt Tensioner

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$148.37USD/EA

~~$35,999.00~~Save 100%

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 Tensioner Description

This Belt Tensioner is indexed for Part Number; Cummins Cummins ISC ISB M923 M931 M936 M925 M939 Truck. Compare reference number 3911621 against the label on your existing Cummins component before ordering.

Additional cross references on file: Cummins4B3.9, 6B5.9, CM556. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

3911621 Cummins4B3.96B5.9CM556B4.5B4.5SB5.9B6.7CMOH6.0B125B6.7SF3.8

Applications

Part Number
Cummins Cummins ISC ISB M923 M931 M936 M925 M939 Truck

Specifications

Part Number	3911621

Fitment Notes

Brand or application signal: Cummins Engine Spare Parts
Product family: Belt Tensioner
System category: Engine Spare Parts > Belt Drive Systems > Belt Tensioner
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.