| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a float control system for a working machine capable of smoothly and surely operating a float when controlling the float in an arm. Ž<P>SOLUTION: A float mode switch 78 for making a float mode 76 valid or invalid it is connected to a controller 75. The float mode 76 of the controller 75 operates a switching device 65 so that the arm 22 is floated when the arm 22 is lowered at a predetermined value or more of operating speed and the tip height of the arm 22 comes down to a predetermined value or less. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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