OIL PRESSURE CONTROL CIRCUIT

摘要

PURPOSE:To eliminate the need for a control valve for confluent flows, and to simplify a device when pumps connected to two respective circuit systems are combined together in their confluent flow. CONSTITUTION:A confluent flow control is carried out for a boom hydraulic cylinder 32 by opening or closing first and second confluence control valves 28 and 29, whilst a confluent control is effected for an arm hydraulic cylinder 44 by opening/closing a third confluence control valve 40.