WORK MACHINE HAVING MOVABLE CAB

PROBLEM TO BE SOLVED: To provide a work machine having a movable cab which facilitates the adjustment of the hydraulic pressure and flow rate of a hydraulic fluid supplied to a cab operating hydraulic drive unit, can carry out the stable movement of the cab, and is operated at a low cost. SOLUTION: The work machine has the movable cab which can change its location or position on a chassis by a cab moving hydraulic cylinder 9. Further the work machine has main pumps 10, 11 and a pilot pump 12 mounted to the chassis. The main pumps 10, 11 function to supply the hydraulic fluid to hydraulic drive units 15 provided for the work machine, and the pilot pump 12 functions to supply a pilot fluid to control valves 16 of the main pumps. The pilot pump 12 is employed as a hydraulic fluid source of the hydraulic cylinder 9. When the hydraulic fluid is supplied to the hydraulic cylinder 9, the supply of the hydraulic fluid to pilot valves 17 is inhibited. COPYRIGHT: (C)2008,JPO&INPIT