25134014
Flywheel Assembly
Mack

The flywheel assembly provides the mass and inertia necessary to smooth engine torque fluctuations and deliver reliable power transfer to the driveline. A balanced assembly minimizes crankshaft vibration, supports a smooth idle, and ensures consistent engagement with the starter via the ring gear. The ring gear must mate properly with the starter, and the overall assembly should be free of cracks and surface defects to avoid imbalance. Routine inspection during clutch service and engine overhauls helps maintain smooth operation and reduces the risk of drivetrain vibrations that could lead to component wear. Replacement is recommended when wear or cracking is detected. Source One Parts Center.