IS300/IS300 SportCross – NEW FEATURES 27 3. Operation The driving force of the engine is first transmitted from the primary wheel to the arc springs. It is then trans- mitted from the arc springs to the flange and inner springs, causing the inner springs to be pressed against the side plates. The driving force is then transmitted to the clutch, since the side plates are riveted onto the secondary flywheel. These processes help restrain torque fluctuation. Further, These inner springs and arc springs achieve high torque capacity combined with a low spring constant. They offer an optimum spring constant and hysteresis for all driving conditions.
Driving Force Transfer Route Flange Engine Primary Flywheel Arc Spring Flange Direction of Rotation Clutch Secondary Flywheel Side Plate Inner Spring Arc Spring Side Plate Primary Flywheel Secondary Flywheel Inner Spring 213IS15 NOTICE The flywheel damper cannot be disassembled. In case of a malfunction, it is necessary to determine whether the source of the problem is in the engine, drivetrain, or in the flywheel damper itself. In case a defect or wear is found on the secondary flywheel clutch disc friction surface, replace the flywheel damper as a unit, instead of attempting to machine it. Any attempts to repair it will risk dam- aging the damper components or seals.