Kobelco Cranes Co., Ltd.

Kabushiki Kaisha Kobe Sieko Sho

Ichiro Kawashima

Taisuke Tsunoo

Yoshio Kato

A steering apparatus provided in a wheeled working machine according to the present invention includes mechanical steering means for steering front wheels in accordance with the operation of operating means by connecting the operating means to a link member for changing the direction of the front wheels so as to transmit a steering force, full-hydraulic steering means, having steering cylinders for respectively changing directions of the front and rear wheels, for steering at least one of the front and rear wheels by introducing hydraulic oil to predetermined steering cylinders in accordance with the operation of the operating means and a selected mode, and switching means for switching the means so as to selectively actuate one of the mechanical steering means and the full-hydraulic steering means.

Wheeled working machine

A brake device includes a controller for inputting detection signals from an engine speed sensor, vehicle speed sensor, shift lever position sensor and engine exhaust brake sensor. When a vehicle speed upon application of engine exhaust brake is lower than a low speed set value of an effective vehicle speed corresponding to a shift lever position, a lockup clutch of a torque converter is disengaged by the controller; and when the vehicle speed is in a range from the low speed set value to a high speed set value of the effective vehicle speed, the lockup clutch is engaged by the controller; and when the vehicle speed exceeds the high speed set value, the lockup clutch is disengaged, and a transmission is down-shifted to a just lower gear range by the controller.

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Akashi, Japan

Ichiro Kawashima