Harrow heavy spring sectional harrow FORTUNA-21 is designed for:
- destruction (chopping) and distribution of straw and plant residues on the field;
- pre-sowing provocation and destruction of small weeds;
- destruction of soil crust;
- to close moisture during pre-sowing harrowing;
- loosening of the soil surface to a depth of up to 12 cm depending on soil density and angle of attack of the tines;
- seed and fertiliser incorporation.
The harrow design is made in the form of a central frame, the front part of which is attached to the tractor, and the rear part is mounted on two transport wheels. The centre beam is movably attached to the rear part of the frame. Side beams are hinged at the edges of the centre beam and rest on the peripheral tramline wheels.
Attachment of the harrow sections is parallelogram. The parallelogram mechanism serves as a suspension for the harrow sections and at the same time for regulating the impact force of the working elements (spring tines) on the soil. The regulation is carried out...
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