Overload Safety Devices
54
9.4.1
Adjusting the Operation Pressure
After connecting the adjusting valve unit to
the tractor spool valve, the system is oper-
able with the maximum and minimum op-
eration pressures adjusted by the factory.
If required the operation pressure can be
adapted individually. For that adjustment
the knobs (1) and (2) are used.
Increasing the maximum operation pressure
Turn knob (1) clockwise.
Decreasing the maximum operation pressure
Turn knob (1) anti-clockwise.
Increasing the minimum operation pressure
Turn knob (2) clockwise.
Decreasing the minimum operation pressure
Turn knob (2) anti-clockwise.
Important:
During work the tractor spool valve must be set to floating position,
otherwise the overload protection is no guaranteed, when several
plough bodies trip at the same time.
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.
1
2
1
2
Summary of Contents for EurOpal
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