(984) 0500-GB NOVA
GB
SERVO NOVA
- 16 -
Fully automatic „Nonstop“ overload safety
The fully automatic overload safety is recommended for soils
which are difficult to plough e.g. soil with stones or other foreign
bodies.
Every ploughing component is hydromechanically safeguarded
against damage on the SERVO-NOVA plough.
When driving over an
obstacle the ploughing
body swings out to either
side and then swings
automatically back into
the working position. There
is no need to stop the
tractor.
The plough body swings
back into work position
automatically.
Along with the fully automatic „Nonstop“ overload safety, all
component carriers have a shear bolt as additional protection. See
chapter "OVERLOAD SAFETY“ for a description.
Setting range
• The overload safety release force can be adapted to the various
soil types.
Normal setting
- Pressure in the hydraulic cylinders (40) must be approx. 10 bar
greater than the nitrogen pressure in the gas accumulator (43).
Nitrogen pressure in the gas accumulator (43) (Factory
set) 80 bar
Pressure adjustment area of the hydraulic cylinder (40)
90 to 160 bar
Should practice show that the overload safety reacts too often,
the pressure
(*
in the hydraulic cylinders can be increased with the
accompanying top-up device (42).
Table
pressure
(
*
release force
( bar ) ( kp )
90
970
100
1060
110
1150
120
1240
130
1320
140
1410
150
1500
160
1590
Increasing the pressure in the hydraulic cylinders:
- Shut-off valve in position A.
- Remove sealing cap (41) from shut-off valve and screw on top-up
line.
- Depressurize servo-valve on the tractor.
- Connect plug-in coupling (42) to the tractor.
- Open shut-off valve (position E). The hydraulic pressure drops.
- Actuate servo-valve on tractor until the manometer shows the
desired pressure. Then close the shut-off valve (position A).
Take note!
The shut-off valve must always be closed (position A)
when ploughing.
- Depressurize top-up line using servo-valve.
- Remove top-up line and screw sealing cap (41) back on.
