| 摘要 |
PROBLEM TO BE SOLVED: To provide a turning operation control device of working vehicle capable of performing continuously a turning running operation while keeping a safety in steering operation even if a certain trouble occurs at a turning mode setting means. SOLUTION: A manual operating type turning mode setting means M for use in setting any one of a plurality of turning modes comprises an operating element 44a that can be freely moved over a plurality of mode instruction positions, a potentiometer 44b for outputting analogue information that is different in response to each of the plurality of mode instruction positions, and a setting processing means 101 for use in setting a turning mode corresponding to the analogue information if the analogue information got from the potentiometer 44b is normal and setting a predetermined or set turning mode if the analogue information is abnormal. Each of running speeds of a pair of running devices is made different in such a way that it may generate a target turning force corresponding to the set turning mode. COPYRIGHT: (C)2004,JPO&NCIPI
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