Overload protection
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12.2.3 Operation
To protect the hydraulic system, plough and tractor, you should always work with
the lowest possible operating pressure.
The maximum operating pressure is set by applying pressure to connection A on
the valve adjustment unit for a few seconds.
The minimum operating pressure is set by applying pressure to connection B on
the valve adjustment unit for a few seconds.
Intermediate values can be set by briefly operating the spool valve in the 1st or
2nd pressure position. They can be read off the pressure gauge (4).
Minimum settable pressure = 125 bar
Maximum settable pressure = 200 bar
12.2.4 Releasing the pressure in the hydraulic system
When carrying out servicing or repair work
on the hydraulic system, release the pres-
sure in the hydraulic system as follows:
Lower the plough and switch the tractor
spool valve to the float position
Open the relief valve (5) which is located
behind a protecting cap.
Before using the plough again
Close the relief valve (5).
Increase the operating pressure to at
least 125 bar.
5
3
2
4
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