Hydrauliksystem für Fahrlader

摘要

A hydraulic system for power loaders, selectively changing the amount of pump discharged oil in accordance with an operational condition of a loader and improving operational efficiency of the loader, is disclosed. The system has a swash plate-type main pump 1 for discharging pressurized oil for working and steering parts of the system, a swash plate-type pilot pump 2 for discharging pressurized oil for a pilot signal output control lever 5, and a regulator 9. The regulator 9 is mounted to a first branch oil passage 9A branched from a main oil passage 1A extending from each of the main and pilot pumps 1,2. The regulator 9 selectively controls the angle of the swash plate of each of the main and pilot pumps 1,2 in accordance with a variable pressure of the first branch passage 9A.