5.14 Exact harrow
The exact harrow (Fig. 82/1) covers the seeds
deposited in the sowing furrows with loose earth
and smoothes the ground.
The following are adjustable
• The exact harrow position
• The exact harrow pressure.
The exact harrow pressure determines the
working intensity of the exact harrow and is
independent of the soil type.
Set the exact harrow pressure so that no earth
bank remains on the field after seed covering.
82
The draw springs that create the exact harrow
pressure are pretensioned by a lever (Fig. 83/1).
The lever (Fig. 83/1) is applied in the adjusting
segment by way of a bolt (Fig. 83/2).
The higher the bolt is inserted in the group of
holes, the greater is the harrow pressure.
For hydraulic exact harrow adjustment the sec-
ond bolt (Fig. 83/3) is inserted as a stop above
the lever (Fig. 83/1) in the adjusting segment.
The harrow pressure is increased as soon as the
hydraulic cylinder applies pressure and the lever
contacts the top pin.
83
82 Cirrus BAH0049-1 09.14
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