Crane use and maintenance: lifting equipment maintenance and maintenance by hand. Every day before class, class of 10 to 30 minutes late, visits to various parts of equipment, all parts are normal, according to the provisions of lubrication, pay attention to mechanical operation sound is normal, to do cleaning work and shift work Tadano crane 55 tons, to achieve equipment neat appearance, the purpose of normal operation, routine maintenance records and records to be made a fixed form shift, and as a file management. Crane Development origin: history. 10 BC, Roman architect Victor Ruwais was in its construction manual describes a lifting machinery. This machine has a mast, mast mounted pulley used 55 tons crane price by guyed mast position, using a winch to pull the rope through the pulley 55 tons crane used to lift heavy loads. Some overweight machinery available two masts, constitute herringbone, the lift was a lateral move, but only slightly, operation is very difficult.