| 摘要 |
PROBLEM TO BE SOLVED: To provide a working machine for track regulating a maximum speed in an off-track traveling and eliminating lack of maximum speed in a on-track traveling. SOLUTION: In a working machine for a track provided with a crawler (or wheels) for off-track traveling and on-track traveling wheels for on-track traveling and traveling on a track with mounting the on-track traveling wheels on the track and lifting the crawler from the ground in on-track traveling, this machine is provided with an off/on-track travel switching valve 16 supplying hydraulic from a hydraulic pump 11 to either of off-track travel motor 20, 22 driving the crawler or an on-track travel motor 18 driving the on-track traveling wheels, and accelerating devices 25, 24, 23 accelerating rotation speed of the on-track travel motor 18 when the off/on-track travel switching valve 16 is switched to the on-track travel motor 18 side.
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