D860MGB rev04
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circuit, there is a remaining pressure higher than the pressure generated by the weight of the rod, the
pulley and the ropes. This pressure is regulated by screw n. 3: screw, it increases; unscrew, it
decreases. The value of the counter-pressure which opposes the rod down travel is about 6/8 bar
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Adjust the counter-pressure as follows (see Figure 13):
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Close the main shut-off valve and discharge pressure with the hand button. The remaining pressure
on the manometer corresponds to the rope anti-loosening counter-pressure.
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If the pressure value needs to be increased or decreased, screw or unscrew the screw n. 3
accordingly.
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If the input pressure needs to be verified:
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Increase the pressure in the circuit with the hand pump;
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Discharge the pressure with the hand button and read the remaining pressure;
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If necessary, repeat the previous operations until the wanted counter-pressure is reached.
Figure 13 - Adjusting of the rod counterpressure
CALIBRATION OF THE HAND PUMP PRESSURE: SCREW N. 9
The hand pump has a safety valve which has to be adjusted at 2,3 times the max static pressure. The
adjusting is carried out through screw n. 9: screw, the max pressure increases, unscrew, it decreases (see
Figure 14). In case there are difficulties in activating the hand pump, close the main shut-off valve, unscrew
the screw n. 3, discharge the pressure with the hand button and quickly activate the hand pump lever. If
necessary, try to fill with oil the plastic pipe which gets inside the tank.
Figure 14 - Adjusting of the hand pump pressure
