Overload Safety Devices
58
9.4.2 Operation
During work the plough bodies will be kept in working position via the rolling sys-
tem. When touching an obstacle the plough body trips upwards, therewith the oil
will be led into the hydro-reservoir. If several bodies trip at the same time, the oil
cannot be kept by the hydro-reservoir. Via a pressure relieve valve the oil can flow
back to the tractor oil tank.
To save the system, the plough and the tractor, it is recommended to work with a
operation pressure as low as possible.
The maximum operation pressure will be reached by means of pressurising con-
nection A of the adjusting valve unit for a few seconds.
The minimum operation pressure will be reached by means of pressurising con-
nection B of the adjusting valve unit for a few seconds.
Intermediate operating pressure values can be adjusted by means of short opera-
tion of the spool valve in the first or second pressure position and can be red from
the pressure manometer (3).
Minimum adjustable operation pressure = 50 bar.
Maximum adjustable operation pressure = 140 bar.
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