Flywheel Ring Gear Cummins 3905031 | J905031, A27920, 6742-01-5206

High-Performance Flywheel Ring Gear for Cummins and Komatsu Engines

The Cummins 3905031 Flywheel Ring Gear is a critical component of your engine’s starting system, engineered to provide a robust and reliable connection between the starter motor and the flywheel. Designed for heavy-duty applications, this ring gear ensures smooth starter pinion engagement, transferring rotational force efficiently to crank the engine without slippage or premature wear.

Key Features and Benefits

• Precision Engineering: Features 137 precisely machined teeth to guarantee seamless meshing with the starter motor pinion, reducing noise and wear during startup.
• Heavy-Duty Durability: Constructed from high-strength, heat-treated steel to withstand extreme torque, thermal stress, and demanding operating conditions.
• Perfect Fitment: Manufactured to exact dimensional specifications for a secure press-fit onto the flywheel assembly.

Application and Compatibility

This flywheel ring gear is compatible with a wide range of heavy-duty industrial and agricultural machinery. It is primarily used in the following engine models:

• Cummins: 6CT 8.3L, QSL9, and other C-Series diesel engines (including Tier 3 applications).
• Komatsu: S6D114, SAA6D114E, and related construction equipment engines.
• Case / New Holland (CNH): 6TA-830 and related agricultural applications.

Technical Specifications

• Part Number: 3905031
• Number of Teeth: 137
• Compatible Brands: Cummins, Komatsu, Case, New Holland