27
Fig. 18 Adjustment of the depth and distance of the roller: 1 – depth adjustment pins with a stabilizing
plate; 2 – roller arm fixing screw.
The distance between the roller and the disc harrow
depends on the mounting
hole of the roller arms (Fig. 18). It should be increased when the soil rejected by the discs
overflows the roller. However, remember that moving the shaft backwards causes the
machine to lengthen and worsens the longitudinal balance of the tractor. The disc harrow
can also work without a roller. Then, however, the discs recess cannot be reduced, and
the soil will remain in an aerated state. When using maximum disc depths, the roller can
also be unlocked to work under its own weight.
The
side plate
must be positioned and locked with the screw so that it is above the
soil surface and is not exposed to stones and sticking out of crop residues. If necessary,
also slide it forward or backward (re-mounting on the holes) to stop the soil being thrown
by the outermost front disc and to pick up the furrow behind the outermost rear disc.
4.4.4
Working depth of the GAL-C H disc harrow
The working depth is determined by the position of the roller the arms of which are
adjustable by the cylinders. In order to maintain a constant stable position of the roller
(working depth) during operation, clamps are fitted on the cylinder piston. Initially, set
the roller and the wheels above the lower disc edge at the height corresponding to the
approximate working depth, and adjust the position during operation, after taking into
account the roller recess. The maximum permissible working depth is 12 cm for Ø560 mm
discs.
Once the required working depth has been determined, take a sufficient number of
clamps from the bracket on the roller arm and place them on the piston of the cylinders.
This ensures a constant working depth during operation. The number of clamps on both
cylinders must always be equal.
The working depth of the implement is set using latches at the piston rod. As more
latches are folded, the operation of the implement becomes shallower. In case none of
the latches are installed, the implement operates at maximum working depth. Fig. 19 and
Fig. 20 show the correct and incorrect way of installing consecutive latch plates on the
cylinder.
