| 摘要 |
PROBLEM TO BE SOLVED: To provide a track/road excavator having a function of preventing an error in lever operation.SOLUTION: A track/road excavator 100 comprises: a super structure 120 having a leader 20 erected in a vertical direction; a lower structure 110 which holds the super structure 120 rotatably and has track wheels 12, 13; and an outrigger jack. In the track wheels 12, 13, the track wheel front wheels 12 are driven by a third hydraulic motor 321a, the track wheel rear wheels 13 are driven by a forth hydraulic motor 322a, and the lower structure 110 is moved forward and backward. The operation of crawlers 11 and the track wheels 12, 13 are performed by a left operation lever 41 and a right operation lever 42. The track/road excavator 100 also comprises a first bypass Li11 for connecting a track advance Li32 and a track advance Li62, and a second bypass Li12 for connecting a track retreat Li42 and a track retreat Li52. |
