A hydraulic operating circuit for working members of earth-moving machines includes linear (1) and rotary (2a, 2b, 2c) hydraulic actuators each of which is associated with a respective hydraulic distributor (5, 6, supplied from a principal supply (8), and with a pressure compensator of the load-sensing type (10,11). A re-supply circuit (26) is also associated with one or more of the rotary actuators for integrating the leakage and includes two anticavitation valves(28) and a valve (33) for boost-feeding the anticavitation valves from the principal supply (P).
展开▼
