HYDRAULIC CIRCUIT FOR HYDRAULIC EQUIPMENT

摘要

A hydraulic circuit is intended to enable a plurality of hydraulic actuators to be locked or unlocked at the same time no matter whether control valves controlling pressurized oil feed to the hydraulic actuators are pilot-controlled or not. To this end, the circuit is provided with oil lines leading from hydraulic pumps to an oil ta nk without passing through the control valves and with first and second selector valves 20 and 24 opening or closing the oil lines.