Trolley with hoist attached to their application to certain limits, and their main drawback for larger loads is the unfavorable effect of the driving force, which does not allow continuous load movement. Cranes for pulling so many times, especially for larger loads, winches front wheels, the winch can be mounted directly on the trolley. The operation of the tensioners can by hand chains (see Figure), made ​​100 pieces, mostly driven by the cranks will be given preference: the gallery is required either by operation of the entire length of the crane or carrier is mounted directly on the trolley.