D860MGB rev04
16/32
Figure 9
– Position of Screws for purge and for the rupture valve regulation
6 CONTROLS AND TEST
After the assembling operations have been completed, after the oil has been filled and the air has been
purged from the circuit, it is proper to make the following checks:
6.1
CHECK OF THE OIL LEVEL IN THE TANK
•
When the cylinder is in upper end position, check that the oil level in the tank covers the motor-pump
group well (min. 2 cm over the motor).
•
When the cylinder is in lower extra-travel position, the oil level has to be 7/8 cm under the tank edge.
6.2
CHECK OF THE MAX. PRESSURE
•
When the main line shut-off valve is closed, the motor activated for the upper travel, the oil
discharges into the tank and the manometer shows the max. adjusting pressure of the overpressure
valve.
•
The value of the max. adjusting pressure has to correspond to 1,4 times the max static pressure with
full load.
6.3
CHECK OF THE START IN UPWARD DIRECTION
In order to get a smooth start of the motor in upward direction without load, be sure that:
•
When the shut-off valve is closed, discharge pressure using the emergency button and start up the
motor again: check that the pressure rises slowly from its minimum to its maximum value.
If necessary, adjusting the parameters of the inverter.
6.4
CHECK OF THE SEALING OF SEALS AND PIPES
Check visually the connection pipe sealing, in particular the joints of the flexible hoses and rigid pipes.
After some travels, the rod looks covered by a small quantity of oil needed for its lubrication.
A possible oil ring on the rod could appear in the first working days because of deformation or hardening of
the seal, in particular if the cylinder has remained laid down for a long time on the site.
This phenomenon will disappear after a short period of time. Only if there is a huge oil quantity in the
recovery tank, it will be necessary to replace the seals.
