Verifica e taratura della valvola limitatrice di pressione
Pressure relief valve check and calibration
If the loading tipper can not be raised, the cause
may be almost certainly attributed to an operation
failure or an incorrect calibration of the pressure
relief valve.
It is therefore necessary to operate so as to restore
correct operation.
Before adjusting, it is necessary to make some
preparations.
Make sure that the tipper is completely lowered.
Remove the plastic protection of the pressure re-
lief valve.
Fit a pressure gauge which can resist high pres-
sure (full scale about 300 Bar) on the connection
sleeve between the hydraulic piston and the pump.
Remove the maximum ascent limit switch by operating on the specific nut as shown in the figure.
TAKE ALL POSSIBLE PRECAUTIONS WHILE PERFORMING THESE OPERATIONS, CLOSE ALL
THE CONNECTIONS PROPERLY. REMEMBER THAT 200 BAR CATEGORY PRESSURES ARE
VERY DANGEROUS FOR BOTH USERS AND THE EQUIPMENT BEING USED.
Activate the tilting system.
Once the loading body is completely raised, press
the ascent button for a few seconds . In these con-
ditions the pressure relief valve is automatically
activated. When the valve mentioned before is ac-
tivated, a reading of about 130 Bar pressure shall
be displayed on the pressure gauge.
If the pressure is lower than the 130 Bar specifi-
cation, loosen the nut and with a hexagonal span-
ner operate on the maximum pressure relief valve
set screw as shown in the figure.
By undoing the set screw, the pressure on the
pressure gauge shall decrease. By tightening the
set screw, the pressure on the pressure gauge
shall increase.
Take the pressure to the prescribed value and
tighten the nut to the prescribed torque.
PORTER 1.3 16V Tipper version
VR - 737
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