Patent ID: 8725358

Claim:
A wheel loader that performs both a digging operation and a loading operation, which comprises a boom with a top end, and a bucket rotatably connected to the top end of the boom; the digging operation for lowering the bucket at the top end of the boom to a location near a ground, placing the bucket into a digging object, and rotating the bucket in a tilt direction to fill a load in the bucket; and the loading operation for raising the boom, approaching a load body and unloading the load in the bucket onto the load body; the wheel loader further comprising: a boom cylinder that actuates the boom; a pump supplying hydraulic oil to the boom cylinder; and a working state detection unit configured to perform a first judgment and a second judgment based on following conditions: (A) a speed stage indicated by transmission is a predetermined speed stage or a detected vehicle speed is equal to or lower than a predetermined vehicle speed, (B) hydraulic pressure at a bottom side of the boom cylinder exceeds a predetermined value, (C) movement of the boom lever in an operational direction to raise the boom, and (D) an angle of the boom is equal to or greater than a predetermined angle; and the first judgment determines whether the conditions (A) and (B) are satisfied and returns an affirmative result when both the conditions (A) and (B) are satisfied, and when the first judgment is affirmative, the second judgment determines, whether either of the conditions (C) and (D) is satisfied and returns a negative result when neither the condition (C) nor the condition (D) is satisfied; and a fluid amount control unit configured to execute fluid amount reduction control and reduce the amount of hydraulic oil supplied from the pump, when the result of the second judgment is negative.