7.3Control of coulter beam and markers
The valve to which two white-marked hydraulic hoses are
connected ensures simultaneous control of the coulter beam
and markers.
Use this valve if the coulters need to be lifted whilst the
markers should be switched as well (turning on headlands).
The valve to which two blue-marked hydraulic hoses are
connected ensures individual control of the markers. Use this
valve if the marker needs to be folded up, for example in
order to pass by an obstacle.
Ensure that the hydraulic valves are in the floating position
during machine operations, eliminating pressure build-up in
the return lines.
Attention! Should the coulter beam rise inadvertently when
this valve is actuated, the tractor’s hydraulic system
needs to be checked. Because of an internal leakage in
the system, pressure is built up in the white-market
hoses aswell.
The ball valve (fig. 31) should be open for folding the
markers up and down.
When actuating any of these two valves, the LH and RH
markers are lowered alternately.
If the intended marker is not lowered, you should proceed as
follows.
- Lower the (wrong) marker roughly half-way.
- Fold up the marker by actuating the valve of the marker
control.
- Actuate the valve one more time. Now the intended marker
will be lowered.
If the ball valve is closed (TRANSPORT position) the coulter
beam can be controlled, but the markers will remain the same
position.
You may choose not to use the marker control because there
are no obstacles on your land. Operator’s errors, if any, are
then eliminated.
In that case, the blue-marked hydraulic hoses should not be
connected. Do bear in mind that, when correcting the marker
to be lowered, the coulters are lifted as well.
52
31
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