RDA 400S
27.06.2011
ver.2
31
3.10 Hydraulic adjustment of sowing depth (option 15582-)
3.10.1
Adjusting the master and slave system
Figure 3.25
The sowing depth of the drill is controlled by three hydraulic rams connected in series in a so-
called master and slave system. Before using the drill for the first time, the rams must be bled and
their position zeroed in relation to each other thus:
Raise the drill to its topmost position so that all hydraulic rams are fully extended. Keep hold of
the hydraulic lever in this position with the tractor engine running at half speed for 15-20 seconds.
The rams have a transfer connection in the top position which means that oil can flow through the
system and flush out any remaining air. Always repeat this bleed procedure for a few seconds after
hitching on, before adjusting the drill, after unfolding and a few times during the working day.
After bleeding and resetting of the master and slave system, the sowing depth for the three sections
can be adjusted. This adjustment is carried out with the seed drill in operational condition out in
the field. Fold out the wing sections of the machine fully and check that the wing sections operate
in line with the middle section, see”
3.11 Adjusting the wing sections” on page 34
. Set a suitable
working depth using the aluminium stopper on the master cylinder's piston rod, which is located
on the middle section, see pos. A. Move forwards and lower the seed drill. Keep the hydraulic le-
ver in position for a few seconds, e.g. while the bout markers unfold.
Check the sowing depth at the centre of each section, see
. If nec-
essary, adjust the length of the piston rod on both side sections. This adjustment should be done
so that none of the piston rod ends comes lose from the machine.
A
Loosen the opposing nut (C)
B
Turn the piston rod (B) with a spanner so that the rod end is screwed in or out. An outward
adjustment gives a shallower sowing depth.
NOTE!
The piston rods may be difficult to turn
when the hydraulic rams are fully extended. Do not adjust the piston rod end beyond 60 mm.
C
Tighten the opposing nut (C) against the end of the rod (B).
Содержание Rapid RDA 400S
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