Assembly and function
Cirrus 3/4/6000 DB2034 08.04
49
4.12 Extra coverage following harrow
The extra coverage following harrow (Fig. 67/1) covers
the seed in the seed furrows evenly with loose soil
levels the soil.
Adjustable functions
• the extra coverage following harrow position for
matching the pre-set seed placement depth.
• the extra coverage following harrow pressure
(normal or increased). The extra coverage follow-
ing harrow pressure determines the working
intensity in relation to the soil conditions.
Fig. 67
The pressure of the extra coverage following harrow
can be pre-adjusted for operation on light and heavy
soil.
Hydraulic rams tension the springs providing the extra
coverage following harrow pressure. The tensioning
can be set via a lever (Fig. 68/1).
Two pins (Fig. 68/2) function as stop for the lever (Fig.
68/1) in the setting segment. The lever rests on the
lower pin when the hydraulic ram is not pressurised
and it rests on the upper pin when the hydraulic ram is
pressurised.
The higher the pin is inserted in the quadrant plate, the
higher the harrow pressure will be..
Set the extra coverage following harrow pressure in
such a way that the seed coverage does not leave any
ridge of soil in the field.
Fig. 68