Cummins Flywheel Ring Gear 3903309 – Durable Engagement for Reliable Engine Starts
The Cummins Flywheel Ring Gear 3903309 is a genuine gear designed to ensure smooth and consistent engagement with the starter motor. It transfers torque effectively during engine cranking, enabling dependable and efficient starts. Because it is a Cummins genuine part, it provides precise fit, high-quality construction, and long-lasting performance. Though small in size, this ring gear is critical for stable engine operation.
🔩 Specifications
- Part number: 3903309
- Genuine Cummins flywheel ring gear
- Made from hardened steel for strength and wear resistance
- Built to OEM standards for durability and precision
- Designed to withstand repeated engagement cycles
⭐ Key Features
- Ensures secure contact with starter motor pinion
- Resists wear, chipping, and thermal stress
- OEM-precision fit for easy installation
- Long service life in heavy-duty engines
⚙️ Technical Insights
The 3903309 ring gear mounts on the flywheel and plays a key role in engine starting. Since it engages precisely with the starter motor, it reduces wear on both components and enhances reliability. As a result, the engine starts smoothly with minimal risk of slippage or damage. In addition, the hardened steel construction resists stress and high-temperature conditions. Furthermore, using Cummins genuine parts ensures consistent performance and avoids issues often caused by aftermarket alternatives.
🛠 Application Scenarios
This flywheel ring gear is widely used in Cummins engines installed in trucks, buses, construction machinery, and marine vessels. Moreover, it is suitable for both routine maintenance and full engine rebuilds. Whether the equipment operates on highways, worksites, or offshore, the 3903309 gear delivers secure and reliable engine starts.
📦 Availability
The Cummins Flywheel Ring Gear 3903309 is in stock and ready for global shipping. To ensure correct fit with your Cummins parts configuration, please provide your engine serial number (ESN). Our support team will verify compatibility and arrange fast, secure delivery of Cummins genuine parts worldwide.
