Patent ID: 7530418

Claim:
A construction machine having a vehicular body, a working mechanism liftably provided on a front portion of said vehicular body, a seat supporting stool provided on said vehicular body, an operator's seat mounted on said seat supporting stool to be taken by operator, control valves provided in the course of hydraulic ducts to control said working mechanism by operating oil supply and discharge from a hydraulic pressure source to said working mechanism, manual operating means provided in the vicinity of said operator's seat for operating said control valves to control said working mechanism, and a pattern selector valve provided between said manual operating means and said control valves to permit selection of an operating pattern of said manual operating means in relation with said control valves, wherein: said pattern selector valve has a valve casing housing a directional control valve adapted to change over connections of oil passages between said manual operating means and said control valves, and a switch lever rotatably supported on said valve casing to permit selector operation of said directional control valve; said seat supporting stool is adapted to accommodate said pattern selector valve in an inner space with said switch lever of said pattern selector valve, located at a front side of said seat supporting stool; a front side of said seat supporting stool is provided with an openable front cover adapted to cover said pattern selector valve; and a check-out window is provided in said front cover to permit viewing there through of a current position of said switch lever of said pattern selector valve.