ARM STOP DEVICE FOR BACKHOE

PROBLEM TO BE SOLVED: To beforehand prevent a tip end of a breaker from colliding with a boom cylinder by an arm bolting movement when a bucket is replaced with a breaker. SOLUTION: This device is provided with a stop control means for linking a control valve for an arm and an arm sensor 16 so as to stop a bolting movement of an arm 11 when the arm 11 which moves to a bolting side reaches a predetermined angle position by providing with the arm sensor 16 for detecting an angle position to a boom 9 of the arm 11. Furthermore, this device is provided with a stop position setting means for changing the setting of the predetermined angle position at any time. By the stop position setting means, the angle position is memorized as the predetermined angle position to the boom 9 of the arm 11 at a point of time when a storage instruction is given.