The pressure relief valve controls the maximum pressure of
the hydraulic circuit. Normally, this valve does not require any
adjustment, since it is calibrated at the factory before the
machine is delivered.
The pressure relief valve must be calibrated in the following
cases:
▪ 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 (figura
7-8):
▪ Disconnect the power cords of the solenoid valves EV2
and EV3 (H and I).
▪ Introduce a pressure gauge with full scale of at least 250
bar in the special quick coupling (1/4” BSP) D.
▪ Using the platform control panel drive the machine
forward and backward. Initially carry out the operation
softly to check that the above mentioned valves have
been disconnected properly (the machine should not
move).
▪ Check the pressure value. The correct value is indicated
in the chapter “Technical features”.
To calibrate the pressure relief valve (figure 7-8):
▪ Disconnect the power cords of the solenoid valves EV2
and EV3 (H and I).
▪ Introduce a pressure gauge with full scale of at least 250
bar in the special quick coupling (1/4” BSP) D.
▪ Locate the pressure relief valve A.
▪ Unscrew the adjusting dowel lock-nut.
▪ Using the platform control panel, drive the machine
forward and backward and adjust the pressure relief valve
by means of the adjusting dowel so as to reach the
pressure value indicated in chapter "Technical
Features". Initially carry out the operation softly to check
that the above mentioned valves have been disconnected
properly (the machine should not move).
▪ Once calibration has been carried out, lock the adjusting
dowel by means of the lock-nut.
To Next Page
Loading...
