Vaderstad RAPID RDA S Series, Manual

Page: 60 / 118

Instructions and settings
60 Ver.3 29/06/07
2.28 Adjusting the seed coulters
NOTE!
Before commencing any work under the drill, be sure to secure it in the raised position. See
”
2.27 Locking the lifting rams during service” on page 59
.
2.28.1 Installation height
To ensure a satisfactory sowing result, it is important that the seed coulters are correctly installed
on the drill. Determine the installation height with regard to the conditions and the wear of the
disc. When the drill has been lowered with the discs resting on firm ground, the seed coulters
should not touch the surface e.g., (C > 0 mm). Please note that as the C measurement is reduced,
the seed coulters become more susceptible to impacts with stones.
Upon delivery, the seed coulters are installed in position A. This installation height suits most op-
erating conditions.
When drilling under very humid conditions, and with considerable plant residues in the soil sur-
face or for shallow drilling in light or humus soil, the discs may occasionally stop. This can be
avoided by moving the coulters up to position B. Position B, however, can result in impaired seed
positioning.
The picture below shows an example of drilling with considerable plant residues in the soil sur-
face. In this case, the seed coulter should be installed in position B.
Figure 2.76
Figure 2.74 Figure 2.75
A
B
C
B