Emergency steering system for wheeled excavators

An emergency steering system for a wheeled excavator, which is installed on the wheeled excavator including an engine, a steering device for steering wheels, a steering pump operated by the engine to supply hydraulic oil to the steering device, and a steering hydraulic line that delivers hydraulic oil from the steering pump to the steering device, the system comprising:

• a pump operated by the engine to discharging pressure oil;
• an emergency hydraulic line that supplies hydraulic oil discharged from the pump to the steering hydraulic line;
• a switching valve configured to selectively supply hydraulic oil passing through the emergency hydraulic line to the steering device;
• an emergency steering device configured to selectively supply hydraulic oil to the steering device;
• a first information unit that senses information on operating status of the emergency steering device by sensing information on the hydraulic oil passing through the switching valve;
• a second information unit that senses information on hydraulic oil passing through the steering hydraulic line;
• a display unit providing information on operating status of the emergency steering device and the steering device;
• and
• a control unit that determines the status of the emergency steering device and the steering device based on the information from the first information unit and the second information unit and transmits the determined status to the display unit.