Beltdrive tensioner for agricultural equipment

A belt drive system comprising:

• a first pulley for rotating a shaft that is connected to the first pulley, the first pulley defining a first pulley axis about which the first pulley can rotate;
• a belt wound at least partially about the first pulley;
• and
• a tensioner assembly that is configured for tensioning the belt, the tensioner assembly comprising a first tensioner pulley, a second tensioner pulley, and a moveable arm,
• wherein in a first position of the moveable arm corresponding to a forward drive configuration, the first tensioner pulley is positioned in contact with the belt while the second tensioner pulley is spaced apart from the belt, and in a second position of the moveable arm corresponding to a reverse drive configuration, the second tensioner pulley is positioned in contact with the belt while the first tensioner pulley is spaced apart from the belt,
• wherein the belt drive system further comprises an actuator comprising (i) a cylinder mounted to a stationary point, and (ii) a piston that is connected to the moveable arm, wherein the movement of the piston causes movement of the arm between the first and second positions, and
• wherein the belt drive system further comprises a spring mounted to the piston, wherein one end of the spring bears on a fixed point on the piston, and an opposing end of the spring bears on the moveable arm for moving the moveable arm independently of the piston towards the first position.