The idler tensioner is crucial for optimal functioning of the idler wheel. Idler wheel tensioner springs in the Lenco L75/76 and 78 are worn out and stretched after so many years. These old and worn springs can cause several problems such as: unstable rotational speed, idler wear, noise and vibration. A too high tension can cause similar problems. Our new springs will apply the correct tension to the idler wheel for best contact pressure of the idler wheel on the platter and motor shaft.