JP2661873B

PURPOSE:To provide the relief method for a bulldozer in the case that the bulldozer or the like remotely controlled by radio is made immobile in a dangerous zone where nobody can enter. CONSTITUTION:The vehicle such as the bulldozer is provided with an emergency receiver 15 for controlling a special actuator while receiving a signal from an emergency commander 14 together with a general receiver 13 for controlling an actuator 23 while receiving a signal from a general transmitter 12. When the general receiver 13 breaks down, the vehicle is controlled by using the emergency commander 14 and the receiver 15 and moved to a safe place by itself. When the vehicle is stopped by fault in an engine 18, an emergency power unit 17 is driven by a battery 25 mounted on the vehicle. Then, the lift cylinder of a working device 22 such as a blade or a ripper is operated, the working device 22 is floated from the ground and at the same time, a brake 24 is released. The defective vehicle is moved to the safe zone by tracting the ripper or the like with a tractor to be repaired.