Upgrade Your Caterpillar C15 or 3406E with Our Serpentine Belt Conversion Kit

Upgrade Your Caterpillar C15 or 3406E with Our Serpentine Belt Conversion Kit

If you're running a Caterpillar C15 or 3406E engine, you already know the importance of efficiency, reliability, and longevity when it comes to your belt-driven accessories.

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If you're running a Caterpillar C15 or 3406E engine, you already know the importance of efficiency, reliability, and longevity when it comes to your belt-driven accessories. That’s why we’re excited to offer a complete serpentine belt conversion kit—designed to replace the traditional V-belt setup with a high-performance 8/6 groove serpentine belt configuration.

This kit is a smart upgrade for operators looking to reduce downtime, extend belt life, and boost overall engine performance. Whether you're maintaining a heavy-duty workhorse or optimizing a fleet of trucks, this solution delivers better belt tracking, increased surface contact, and significantly reduced slippage.

Why Switch to a Serpentine Belt System?

The traditional V-belt system, while reliable in its time, is increasingly being replaced by serpentine belts for several key reasons:

  • Improved Power Transmission: With an 8-groove main drive and 6-groove AC drive, the belts grip better, reducing energy loss and enhancing accessory performance.
  • Reduced Belt Slippage: Serpentine belts maintain better alignment and tension, minimizing slippage and the associated wear and tear.
  • Extended Belt Life: Less slippage and more even load distribution means your belts last longer—saving time and money on replacements.
  • Simplified Maintenance: A single, continuous belt system is easier to inspect, replace, and maintain compared to multiple V-belts.

Designed for Flexibility

This kit is compatible with both top pad and side pad mount AC compressors, as well as pad mount alternators. It includes a carefully curated mix of OEM and high-quality aftermarket parts, ensuring reliability without the premium cost of all-OEM kits.

Whether you're replacing a failing system or proactively upgrading for better performance, this kit has everything needed to get the job done right.


What’s Included in the Kit?

Here's a full list of components included in the serpentine belt conversion kit:

  • Alternator Mounting Bracket – Precision-fit bracket for pad mount alternators.
  • AC Compressor Mounting Bracket – Works with both top pad and side pad configurations.
  • Crankshaft Pulley (8 Groove) – OEM component for optimal reliability.
  • Crankshaft Pulley Adapter – Ensures a secure fit between the pulley and crankshaft.
  • Alternator Pulley (8 Groove) – Matches the crank pulley to provide consistent drive.
  • Upper Belt Tensioner (6 Groove for AC) – High-quality Gates tensioner for reliable AC operation.
  • Lower Belt Tensioner (8 Groove Main Drive) – Gates component to maintain perfect tension on the main belt.
  • Upper Smooth Idler Pulley (OEM) – Provides consistent belt tracking on the upper section.
  • Lower Idler Pulley (8 Groove, OEM) – Maintains tension and alignment on the main drive.
  • Fan Hub Mounting Studs – Necessary hardware for proper fan hub installation.
  • All Fastening Hardware – Bolts, washers, and other fasteners for a complete, no-guesswork install.
  • Optional Belt Set – Available upon request to complete the kit.

Upgrading to a serpentine belt system on your Caterpillar C15 or 3406E engine is a straightforward way to enhance reliability, reduce maintenance, and improve engine performance. With this comprehensive conversion kit, you're getting a well-engineered solution that blends OEM durability with cost-effective aftermarket innovation.

Whether you’re an owner-operator, a fleet manager, or a diesel tech looking for a dependable upgrade, this kit provides everything you need to make the switch with confidence.

Questions? Want to confirm compatibility or order a belt set? Feel free to reach out—we’re here to help you get the most from your engine.