Abstract: A pulley plate, a pulley and a belt drive system are disclosed. Each include a pulley plate or a pulley having an inner surface adapted to be driven about an axis of rotation and having a perimeter. The inner surface additionally includes a plurality of belt-wiping grooves at least partially between the axis and the perimeter. The plurality of belt-wiping grooves are located or patterned in the inner surface so as to contact the belt in different locations to reduce wear on the wall of the belt. In one embodiment, the plurality of belt-wiping grooves are centered about the axis and are unequally circumferentially spaced from one another. In another embodiment, the plurality of belt-wiping grooves are centered about a center offset from the axis.

Abstract: A pulley plate for use with an opposing pulley plate wherein the plates are configured so as to receive a belt therebetween. The pulley plate includes an inner surface and an outer surface. The inner surface is opposite the outer surface and is adapted for facing the opposing pulley plate. A belt-wiping surface obliquely extends from the inner surface and is located so as to engage the belt. The belt-wiping surface wipes the edges of the belt to increase the friction between the pulley plate and belt and so increase the efficiency of the pulley.

Abstract: An agricultural vehicle, tractor, or combine includes a slip monitoring system for determining whether a slip condition exists. The agricultural vehicle includes a combustion engine which indirectly drives a piece of equipment such as a rotor. The rotor is mechanically coupled to the engine via a rotor-drive belt system including two belts and four pulleys. The slip monitoring system analyzes the speed of the rotor and the speed of the engine to determine if there is slippage between the belts and the pulleys. The system determines when a slip condition exists by comparing the ratio of the rotor speed to the engine speed to the ratio of the rotor speed to the engine speed under no-load conditions. When the system determines that the ratio is below the threshold, a display provides visual and audio warnings of the slip condition. The monitoring system is implemented as a software subroutine.