| 摘要 |
PROBLEM TO BE SOLVED: To simplify structure of a control valve group, and improve workability in assemblage by disposing mechanical operation type directional control valves in the control valve group to be collected on one side. SOLUTION: Directional control valves 30-38 of a control valve group 28 is installed on a bottom plate 17 of a revolving frame 16 in a vertically placed state, and the soil discharging directional control valve 30 for and the left and right travelling directional control valves 31, 32 comprising mechanical operation type directional control valves are disposed to be collected to the uniderside to the other directional control valves 33-38. A cable 41 introduced from an operation lever 27 for soil discharging work in an operation lever device 23 and cables 42, 43 introduced from left and right travelling operation levers 25, 26 are extended along the bottom plate 17, etc., of the revolving frame 16, and these cables 41-43 are connected to spool ends of the directional control valves 30-32 at the position of a cable holder 40.
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