Maintain proper accessory drive belt tension and prevent premature slippage or wear with this Genuine Cummins Belt Tensioner (Part Number: 3976831). Engineered to exact OEM specifications, this heavy-duty assembly delivers consistent tension and reliable damping under the high-stress operating environments of commercial diesel engines.

Key Features:

OEM Quality & Precision Fit: Manufactured by Cummins to ensure correct alignment, smooth operation, and long-term durability.

Optimal Tension Control: Built-in internal spring mechanism maintains ideal belt tension, reducing wear on alternators, water pumps, and other belt-driven accessories.

Heavy-Duty Construction: High-strength metal housing and durable pulley engineered to withstand intense engine vibration and continuous daily use.

Application Compatibility: Designed for specific heavy-duty Cummins diesel engine platforms requiring part number 3976831.

Specifications:

Brand: Cummins Genuine Parts

Part Number: 3976831

Part Type: Drive Belt Tensioner Assembly

Quantity: 1 Unit

Condition: Brand New

Package Includes:

1 x Cummins Drive Belt Tensioner (Part # 3976831)

Let me know if you need any other items prepared!

SHIPPING INFO: All orders will be shipped via the US Postal Service, FedEx or UPS.
Orders received before 3 p.m.
Eastern Time Monday through Friday (except holidays) will be processed the same day.

International buyers are responsible for all customs charges inclusive of any and all taxes and duties. Please be sure that the item that you are purchasing can be imported into your country. Shipper is not responsible for any delays once the package leaves our facility.

Orders received after 3 PM will be processed the next business day.
Our transportation partners do not process orders on the weekend. Therefore, if you place an order after 3 PM on Friday your order will be processed the following Monday.