BELT TENSIONER FOR CASE IH, AND NEW HOLLAND 87345929

Belt Tensioner for IH Magnum and New Holland Tractors ( Case )

The 87345929 belt tensioner is a replacement part designed for Case, IH, and New Holland tractors listed in the documented applications. Equipped with a 72.5 mm diameter pulley, it is installed in the belt drive system to maintain proper tension and ensure the smooth operation of belt-driven engine accessories.

Role of the Tensioner in the Belt Drive

A belt tensioner is designed to keep the belt properly tensioned along its entire length. When tension becomes insufficient, the belt may slip, run crooked, or wear out more quickly. Conversely, a tensioner in good condition helps ensure smoother operation of the belt-driven auxiliary components.

On high-horsepower tractors, this component contributes to the proper operation of the engine accessory drive system. If it becomes worn, symptoms may appear quickly: noise, vibration, belt overheating, or loss of smoothness in the drive.

Known applications on Magnum, T8000, and TG series

This part number is suitable for IH Magnum tractors ( Case ) as well as New Holland T8000 and TG series tractors listed in the product’s compatibility chart. These applications correspond to specific models; therefore, do not assume this part number fits an entire tractor family without verification.

If your machine belongs to one of these series, comparing it with the part already installed remains the surest way to confirm the replacement.

Useful reference points for identifying part number 87345929

To select this tensioner, compare several points with the part being removed:

• part number 87345929, as noted on your unit or in your maintenance manual;
• the pulley diameter, in this case Ø 72.5 mm;
• the application on the following tractors Case, IH Magnum, and New Holland T8000 or TG models explicitly listed;
• the general shape of the tensioner and its location in the belt path.

Diameter is a good sorting criterion, but it does not replace a comprehensive inspection. Before ordering, visually compare the tensioner currently installed and verify that the part number you are looking for matches your tractor’s assembly.

When to Replace a Belt Tensioner

Replacement is warranted when a belt shows abnormal wear or when the system exhibits unusual noises and vibrations. Uneven tension can also disrupt the drive to certain engine accessories and accelerate belt deterioration.

During service, it’s a good idea to inspect the overall condition of the belt and associated pulleys. To avoid mistakes, verify part number 87345929, the roller’s diameter of 72.5 mm, and the exact fit for your model before proceeding with the replacement.

Dimensions and Technical Specifications

• 72.5 mm diameter

Compatibility by Make and Series

Case · Tractor

• Magnum 225
• Magnum 250
• Magnum 255
• Magnum 280
• Magnum 310

New Holland · Tractor

• T8010
• T8020
• T8030
• T8040
• T8050
• TG215
• TG245
• TG275
• TG305

Case IH · Magnum Series

• Magnum 225
• Magnum 250
• Magnum 255
• Magnum 280
• Magnum 310

FAQ — Frequently Asked Questions

What is the 87345929 belt tensioner used for?

This belt tensioner is used to maintain proper tension on the engine’s belt drive. It helps ensure smoother operation of belt-driven accessories and minimizes the effects of slack, which can accelerate belt wear.

Is this tensioner compatible with the IH Magnum 225, 250, 255, 280, and 310 Case?

Yes, this part number is documented for IH Magnum 225, Magnum 250, Magnum 255, Magnum 280, and Magnum 310 Case tractors. It is also listed for New Holland T8000 and TG series tractors listed in the product applications; it is still helpful to compare the part number currently installed.

Is a diameter of Ø 72.5 mm sufficient to identify the correct part?

No, the pulley’s diameter is a useful reference, but it is not sufficient on its own. To ensure a proper replacement, also check part number 87345929, as well as the overall condition of the existing tensioner and its installation on the specific tractor.

What signs might indicate a worn belt tensioner?

Operating noises, vibrations, uneven belt tension, or abnormal belt wear are common signs. A worn-out tensioner can also disrupt the drive to engine accessories; a complete inspection of the assembly is therefore recommended during replacement.

Original replacement part numbers and brand names are provided for comparison purposes only. This does not imply that these are original parts.