WORKING DEVICE HYDRAULIC CIRCUIT FOR WORKING VEHICLE

摘要

PROBLEM TO BE SOLVED: To provide a hydraulic circuit for a working device of a working vehicle, which prevents the life degradation of an oil filter and an oil cooler, and damage thereto while achieving lower manufacturing cost by reducing surge pressure to be generated in a return pipe line. SOLUTION: In the return pipe line for operating oil via which a direction selector valve for supplying/discharging the operating oil to a hydraulic actuator is connected to an oil tank, there are provided: a branch pipe which has one end connected to the return pipe line and the other end closed; and the oil filter and the oil cooler which are arranged between the connection position of the branch pipe and the oil tank. COPYRIGHT: (C)2006,JPO&NCIPI