Overload Safety Devices
59
9.4.3 Make hydraulic system pressureless
The hydraulic system must always be
without pressure, for repair or service work
for example. Therefore with lowered
plough the tractor spool valve must be set
to floating position and the relief valve (4)
opened.
Before the next use, the relief valve (4)
must be closed again and the operation
pressure set to 50 bar minimum.
• Read and adhere to the General Safety Instructions as well as
to the Instructions “Hydraulic equipment”!
• If required, the hydraulic system may only be made pressure-
less by operating the relief valve (4), the tractor spool valve
must be set to floating position then.
• Hydraulic system is permanently under pressure!
• With a drop pressure, the plough bodies swing downwards! Keep distance!
• Do not allow any body within the release area of the bodies.
• With an overload, the bodies trip upwards. Keep distance!
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