Provided is a floating base-cutter assembly (16) for use on sugar-cane harvesters, the assembly being formed by two base-cutters. Each of the base-cutters (16) comprises a set of cutting knives (9). The base-cutter assembly (16) comprises an adjustable set of cutting knives (9) that may be selectively adjustable with respect to the ground. The base-cutter assembly (16) is also mounted on the harvester body via a set of articulated rods (2, 5). The base-cutter assembly (16) also includes an electric switch (7) and an inverted-shell-shaped component (8) that collectively control a hydraulic or pneumatic cylinder (4) to articulate the rods (2,5) and maintain the set of cutting knives (9) at a redetermined distance relative to the ground surface, regardless of variations in the ground surface.

A grass mowing machine has a plurality of cutting units, and a diverter valve diverting hydraulic flow from a raise/lower sub-circuit to a mowing sub-circuit when the engine runs at a reduced or economy mode speed and the cutting units are at the lowered position.

A grass mowing machine has a plurality of cutting units, and a diverter valve diverting hydraulic flow from a raise/lower sub-circuit to a mowing sub-circuit when the engine runs at a reduced or economy mode speed and the cutting units are at the lowered position.

The present invention relates to a floating base-cutter assembly (16) for use on sugar-cane harvesters, the assembly being formed by two base-cutters, wherein each of the base-cutters (16) comprises a set of cutting knives (9), the base-cutter assembly (16) comprising primary adjustment of the distance of the set of cutting knives (9) with respect to the ground, the base-cutter assembly (16) being mounted on the harvester body by means of a set of articulated rods (2, 5), the base-cutter assembly (16) comprising reading means for reading variation of the ground surface, the reading means (7, 8) being capable of generating an electric signal for variation of the distance of the set of cutting knives (9) with respect to the ground With this invention, the base-cutters (16) can accommodate ground unevenness rapidly, enabling one to cut the sugar-cane at an adequate height.

The present invention relates to a floating base-cutter assembly (16) for use on sugar-cane harvesters, the assembly being formed by two base-cutters, wherein each of the base-cutters (16) comprises a set of cutting knives (9), the base-cutter assembly (16) comprising primary adjustment of the distance of the set of cutting knives (9) with respect to the ground, the base-cutter assembly (16) being mounted on the harvester body by means of a set of articulated rods (2, 5), the base-cutter assembly (16) comprising reading means for reading variation of the ground surface, the reading means (7, 8) being capable of generating an electric signal for variation of the distance of the set of cutting knives (9) with respect to the ground With this invention, the base-cutters (16) can accommodate ground unevenness rapidly, enabling one to cut the sugar-cane at an adequate height.