Abstract: A mower including a mower deck having a cutting chamber therein; and a rotatable cutter head disposed within the cutting chamber for cutting in a sweep or cutting plane wherein the sweep or cutting plane of the cutter head is movable relative to the grass surface being cut so that it can adopt a number of operating positions. The cutting chamber has an inner wall which includes a first wall section adjacent the cutter head in the region of the cutting or sweep plane and a recess in an upper section of the inner wall above the cutting or sweep plane, there being a step between the first wall section and upper wall section of the inner wall.

Abstract: A belt tension adjustment mechanism having a pivoting pulley support plate adapted to cooperate with a pivoting ratchet plate. The pulley support plate directly or indirectly anchors a belt to be tensioned. A tension spring is associated with the ratchet plate to bias the ratchet plate towards a position of increased belt tension. The ratchet plate includes a teeth and pawl arrangement for preventing the ratchet plate from spontaneous rotation to a position of reduced belt tension.

Abstract: A vehicle drive assembly includes a rotating shaft driven by an endless belt which engages and travels about forward and reverse pulleys attached to the shaft and also about an idler pulley which indirectly enables rotation of the forward and reverse pulleys in the forward and reverse directions, respectively. The drive assembly also includes an oscillating clutch assembly, operable by a clutch pedal, which allows both selective engagement of clutch plates with either of the forward and reverse pulleys and neutralization of the clutch assembly. The clutch assembly is also operably linked to the vehicle braking system such that actuation of the brake pedal also effects neutralization of the clutch assembly.