Unless a gear rattle or other mechanism alerts the operator to high levels of torque fluctuation, torsional vibration problems usually don’t show themselves until the occurrence of driveline-component failure. The most frequent issues have been with the engine crankshaft damper, coupling, clutch, and shaft failure; keyway hammering; spline wear; and premature wear or failure of driven accessories, such as compressors and hydraulic pumps...
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