Most high horsepower engines are equipped with one or two viscous dampers attached to the front end of the crankshaft or camshaft.

 

Purpose of the Vibration Damper

The purpose of the vibration damper is to reduce the torsional vibrations in the crankshaft or camshaft and to keep the material stresses within acceptable limits thereby eliminating the risk of failure.

 

When the crankshaft rotates uniformly, without experiencing any torsional vibrations the intertia mass in the housing also rotates without any slippage occurring. When vibration amplitudes are superimposed, a relative motion takes place between the housing and intertia mass. The resultant forces generate alternating stresses in the silicone fluid. The sum of these stresses over the gap surface between the intertia mass and housing, results in a damping action.

 

A worn out viscous damper leaves the crankshaft torsional vibration unchecked and can cause costly engine damage. Replacement intervals vary depending on engine manufacturer, and type of service.

 

Dampers should be replaced or remanufactured at major engine rebuild intervals to assure the crankshaft is properly protected. This will also reduce premature bearing wear, gear wear, and avoid loosening of intertia mass or pulley bolts and throwing or slapping of belts

 

Heavy Duty Components is a leading after market supplier of new and remanufactured Viscous Vibration Dampers.