Overload protection
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11.2.3 Operation
To protect the hydraulic system, the plough and the tractor itself, the lowest possi-
ble operating pressure should always be used.
The maximum operating pressure is set by applying pressure to connection A on
the valve adjusting unit for several seconds.
The minimum operating pressure is set by applying pressure to connection B on
the valve adjusting unit for several seconds.
Intermediate values can be set by briefly setting the control unit to the 1st or 2nd
pressure position and reading the pressure on the pressure gauge (4).
Minimum pressure = 50 bar
Maximum pressure = 200 bar
11.2.4 Depressurising the hydraulic system
The hydraulic system must always be de-
pressurised, if any work such as servicing
or repairs is to be carried out on it. To do
this, the tractor control unit is switched to
float position with the plough lowered and
the pressure relief valve (5) located behind
a protective cap is opened.
Before starting up for the next time, the
pressure relief valve (5) must be closed
again and the operating pressure built up
to at least 50 bar.
5
3
2
4
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