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Cummins ISB and QSB Belt Tensioners

Belt Tensioner for Cummins ISB and QSB Engines

We stock belt tensioners for Cummins ISB and QSB engines. You can easily access our inventory by visiting the product links listed below.

If you do not see the part you are looking for, please use our quote request form or call us at 888.687.0539: our knowledgeable sales staff will gladly help you.

3974102

BELT TENSIONER - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$270.26

3976834

BELT TENSIONER - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$230.83

4981116

BELT TENSIONER - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$271.86

5259022

BELT TENSIONER - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$229.74

5270678

BELT TENSIONER - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$242.08

5333477
Hassle-Free Return Item

BELT TENSIONER - B / ISB / QSB

Genuine Cummins Part

$230.83

5333478

BELT TENSIONER - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$231.96

5333480

BELT TENSIONER - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

Genuine Cummins Part

$302.36

DS-3937553
Hassle-Free Return Item

BELT TENSIONER - B SERIES / ISB / QSB

$83.95

DS-3937556
Restocking Fee Applies

BELT TENSIONER - 4BT3.9 / 6BT5.9 / ISB / ISB3.9 / ISB4.5 / QSB3.9

$88.05

DS-3947574

BELT TENSIONER - B SERIES / ISB / QSB

$202.49

DS-3976831
Restocking Fee Applies

BELT TENSIONER - 6C / ISB / QSB

$162.60

DS-5333480

BELT TENSIONER - 4B3.9 / B4.5 / 6B5.9 / B6.7 / ISB / QSB

$214.34

888.687.0539 (U.S.)|225.706.4858 (Int.)

Monday-Friday 7am-5pm CST
8784 S. Choctaw Dr. Baton Rouge, LA 70815
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Caterpillar® and all of the Caterpillar® engine models listed on this website are registered trademarks of Caterpillar, Inc. Cummins® and all of the Cummins® engine models listed on this website are registered trademarks of Cummins. Detroit Diesel® and all of the Detroit Diesel® engine models listed on this website are registered trademarks of Daimler AG. John Deere® and all of the John Deere® engine models listed on this website are registered trademarks of John Deere. Allison Transmission® and all of their transmission models listed on this website are registered trademarks of Allison Transmission®. Diesel Parts Direct is not an authorized dealer for Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission. None of the parts beginning with "DS" or "R" are genuine Caterpillar, Cummins, Detroit Diesel, John Deere, or Allison Transmission items.

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