Flywheel Ring Gear Cummins 3907308 | J907308, 1241198H1, 3902127, 4929827

High-Durability Flywheel Ring Gear for Cummins Engines

The Flywheel Ring Gear 3907308 is a critical component designed to facilitate seamless starter motor engagement and reliable engine ignition. Manufactured to meet rigorous heavy-duty standards, this ring gear features 158 precision-cut teeth that ensure smooth power transfer and prevent premature wear on your starter drive pinion.

Key Features & Benefits

• Precise Fitment: Engineered specifically for Cummins C-Series (6CT 8.3) and QSC 8.3 engines, ensuring a perfect press-fit onto the flywheel.
• Exceptional Durability: Constructed from high-strength, heat-treated steel to withstand the high-torque demands of heavy-duty diesel starting cycles.
• 158-Tooth Configuration: Precision-machined teeth profile reduces friction and wear, extending the service life of both the ring gear and the starter motor.
• Broad Compatibility: Widely used in agricultural, construction, industrial, and marine applications powered by Cummins engines.

Compatible Engine Models

• Cummins 6CT 8.3 / 6C8.3
• Cummins QSC 8.3
• Cummins B5.9 / ISB / QSB (select configurations)
• Cummins ISC / ISL / QSL (select configurations)