¤ WARNING: Failure to follow these safety precautions may lead to a serious accident. 7. PRECAUTIONS DURING OPERATION 1-17 PRECAUTIONS FOR OPERATION ‡ Be careful not to go close to the edge of a cliff by mistake. ‡ Use the machine only for its main purpose. Using it for other purposes will cause failures. Specified work © See “12.15 WORK THAT CAN BE CARRIED OUT BY HYDRAULIC EXCAVATOR”. ‡ To ensure an ample view, do as follows. • When working in dark areas, fit working lamps and front lamps to the machine. If necessary, set up lighting at the jobsite. • Stop operations when the visibility is poor, such as in fog, mist, snow, and rain.
Wait for the visibility to improve to a level which causes no problems for the operation. ‡ To avoid hitting the work equipment, always do as follows. • When working in tunnels, on bridges, under electric wires, or when parking the machine or carrying out other opera- tions in places with limited height, be extremely careful not to hit the bucket or other parts. • To prevent collisions, operate the machine at a safe speed when working in confined spaces, indoors, or in crowded areas. • Do not pass the bucket over the heads of workers or over the operator’s compartment of dump truck. DO NOT GO CLOSE TO HIGH-VOLTAGE CABLES ‡ Do not let the machine touch overhead electric wires.
In the case of high-voltage cables, even going close can cause electric shock. ‡ To prevent accidents, always do the following. • On jobsites where there is danger of the machine contacting electric wires, consult with the electric power company and check that the actions required by law are being taken before starting operations. • Wear shoes with rubber soles and rubber gloves, spread a rubber sheet on the seat and be careful not to let any part of your body not protected by rubber touch the machine. • Use a signalman to give warning if the machine approaches too close to the electric cables. • Check with the electricity company about the voltage of the cables before starting operations.
Voltage Min. safety distance 100 · 200 V 2 m voltage Low 6,600 V 2 m 22,000 V 3 m voltage 66,000 V 4 m 154,000 V 5 m high 187,000 V 6 m 275,000 V 7 m Very 500,000 V 11 m