Patent ID: 6945335
Filing Date: 2005-09-20
Classification: E02F

Abstract:
1. An oil-pressure controlling device for an earthmoving machine comprising: a blade tilt-operably attached to a vehicle main body; a pair of tilt hydraulic actuators attached to left and right of the blade; a variable capacity hydraulic pump for supplying hydraulic oil to the tilt hydraulic actuators; changeover means for performing changeover between a single tilt operation hydraulic passage through which hydraulic oil is supplied to one of the pair of tilt hydraulic actuators and a dual tilt operation hydraulic passage through which hydraulic oil is supplied to both of the tilt hydraulic actuators; capacity control means for controlling a capacity of the hydraulic pump in such a way that a pressure differential between a discharge pressure of the hydraulic pump and a load pressure of the tilt hydraulic actuators is maintained at a set value; indicating means, selected in accordance with when the single tilt operation is to be performed or the dual tilt operation is to be performed, for indicating alterations of the pressure differential set value; and pressure differential set value altering means for altering the pressure differential set value in accordance with indicated details of the indicating means.