Description

This flywheel is designed for Cummins B Series engines and replaces OEM part number 3946387. It ensures balanced engine rotation and accurate clutch alignment for efficient power transfer. Manufactured from heat-treated, high-strength materials and built to OEM specifications, this flywheel guarantees reliable performance, a perfect fit, and easy installation in medium-duty commercial and industrial diesel applications. Application: Aftermarket Cummins Flywheels 3.9 L / 5.9 L B-Series Design: Flat Mounting: 8 Bolt Holes Size: SAE #3 Clutch: 12 1/4″ (310 MM) Ring Gear: 3910903 15 3/8″ O.D. – 152 Teeth Pilot Bearing: Needle Bearing Cross Reference Numbers: 3942798 3923099 3920379 3901395 Flywheel Bolt 3900269 Flywheel Bolt Washer Key Features OEM replacement for Cummins 3946387 Fits Cummins B Series 3.9L/5.9L/6.7L engines Provides smooth clutch engagement and torque delivery Heat-treated for enhanced strength and durability OEM-style fit for quick, secure installation Compatibility Cummins B Series 3.9L Engines Cummins B Series 5.9L Engines Cummins B Series 6.7L Engines OEM Replacement Part #: 3946387