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Fig. 17 View of the cylinder with the nut used to level the machine.
Pre-set the positions of the individual working units in the GAL disc harrow before
working in the field. Also level the machine lengthwise with the tractor upper fastener or
with the drawbar turnbuckle and laterally with the support rail of the right lower bar.
Then, make the first work passage to set the optimum working speed and to correct the
adjustment based on an assessment of the correct operation of the individual components.
The operating speed should be 10 - 15 km/h.
In a well-adjusted machine, the frame
must be parallel to the ground and all working units must be equally recessed in the soil
over the entire working width.
The working depth of the disc harrow
is determined by the position of the roller, the
arms of which are locked in the holders with pins (Fig. 18). Initially, set the roller above
the lower disc edge at the height corresponding to the approximate working depth, and
correct the position during operation, after taking into account the roller recess. In order
to change the position of the roller, after lifting the harrow, the pins should be installed
in the appropriate holes; make sure that the pins are installed in both holes in the same
way. Roller falling after lifting is limited by a bolt, and can be further limited by a pin
mounted in holes close to the bolt. The maximum working depth is 12 cm for Ø560 mm
discs and 15 cm for Ø610 mm discs.
Lock nut
Place of adjustment with “41”
wrench
