The described pressure relief valve controls the
maximum pressure of the ON-OFF movement
circuit (steering, cage rotation, cage levelling).
Normally, this valve does not require any
adjustment, since it is calibrated at the factory
before the machine is delivered.
Calibration is required:
▪ in case of replacement of the hydraulic
block
▪ in case of replacement of the pressure
relief valve only.
Check operation at least once a year
To check the operation of the pressure relief
valve:
▪ Introduce a pressure gauge with full
scale of at least 250 bar in the special
quick coupling (1/4” BSP) A;
▪ Using the ground control panel, rotate
the cage up to the end stop.
▪ Check the pressure value. The correct
value is indicated in the chapter
“Technical features".
To calibrate the pressure relief valve:
▪ Introduce a pressure gauge with full scale of at least 250 bar in the special quick coupling (1/4” BSP) A;
▪ Locate the pressure relief valve of lifting circuit B;
▪ Unscrew the adjusting dowel lock-nut.
▪ Using the ground control panel, rotate the cage up to the end stop.
▪ Adjust the pressure relief valve by means of the adjusting dowel so as to reach the pressure value indicated in
chapter "Technical Features".
▪ Once calibration has been carried out, lock the adjusting dowel by means of the lock-nut.
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