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Belt Tensioner and Pulley Assembly 3104149 for Cummins ISX – Northline Parts

Belt Tensioner and Pulley Assembly 3104149 for Cummins ISX

SKU: NLT2S00747
$56.79 In Stock
$56.79
Sale price  $56.79 Regular price 
Ships for free in 2–4 business days.
This accessory-belt tensioner and pulley assembly is intended for Cummins ISX engines using the matching tensioner reference #3104149. It maintains pressure on the engine's accessory drive belt.
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Compatible Models

We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.

Compatible equipment / model
  • Cummins ISX diesel engine with matching accessory drive
  • Freightliner trucks equipped with the applicable Cummins ISX engine

Product Overview

A spring-loaded tensioner keeps belt tension steady as engine speed and accessory load change. The unit's offset, pulley diameter and mounting orientation must match the accessory-drive layout.

Belt chirping, a wobbling pulley or a tensioner arm that no longer holds pressure can indicate wear; inspect the belt and pulleys together.

Key Features & Performance

  • Belt Tensioner and Pulley Assembly 3104149
  • ISX accessory-drive variations
  • Check engine serial number, tensioner bracket, pulley grooves and original reference before installation.

Replaces / Cross-References

  • 3104149
  • 89448

What Is Included

1 belt tensioner/pulley assembly

Fitment Notes

Check engine serial number, tensioner bracket, pulley grooves and original reference before installation.

Frequently Asked Questions

When should this part be replaced? Belt chirping, a wobbling pulley or a tensioner arm that no longer holds pressure can indicate wear; inspect the belt and pulleys together.

Is this a genuine OEM part? No. This listing describes a replacement or accessory unless explicitly stated otherwise. Manufacturer names and OE numbers are used to identify the intended application.

Part Summary

Keywords: Belt Tensioner and Pulley Assembly 3104149 for Cummins ISX, 3104149, 89448, Cummins ISX diesel engine with matching accessory drive, Freightliner trucks equipped with the applicable Cummins ISX engine.

Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.

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