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too much.
When fitting, check that the cam is fitted in the cor-
rect position.
c) Manual return valve does not close
If the piston cannot execute another cycle, make
sure that the manual return valve is closed.
d) Incorrect adjustment of the maximum pre-
sure valve
If the pressure drops and the cause cannot be
identified immediately, have the maximum pressure
valve cleaned and calibrated by a specialist service
technician or the manufacturer.