
MVT26
October 2003
Section 5
Page 89
5.1.1
Maintenance of the V-belt and Sheaves
5.1.1.1
Check The Sheaves.
Before a new set of drive belts are installed, the condition of the sheaves should be checked. Dirty or
rusty sheaves impair the drive’s efficiency and abrade the cover of the belts, which results in premature
failure. Worn sheaves shorten belt life as much as 50%. If the grooves are worn to the point where the
belt bottoms, slippage may result and the belts may burn. If the side walls are “dished out,” the bottom
shoulder ruins the belt prematurely by wearing off the bottom corners.
5.1.1.2
Check the V-belt
Check the V-belt regularly for damage and wear. Replace if necessary. V-belt tension is adjusted auto-
matically by the spring tension idler.