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The mobile crawler crane is specific crane made with either a telescopic boom or a lattice boom. These move upon the crawlers tracks. Because this crane is self-propelled, it can move around certain work sites without the need for a lot of set up. Due to their enormous weight and size, crawler cranes are rather pricey and even difficult to transport from one location to another. The crawler's tracks provide stability to the machinery and allow the crane to work without the use of outriggers, however, there are some units which do utilize outriggers. Also, the tracks provide the machine's movement.
Early Mobile Cranes
The very first mobile cranes were originally mounted to train cars. They moved along short rail lines which were specifically made for the project. When the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the agricultural business and the construction industry. Not long after, the crawler tracks were adopted by excavators and this further showcased the versatility of the machinery. It was not long after when manufacturers of cranes decided that the crawler track market was a safe bet.
The First Crawler Crane
Northwest Engineering, a crane manufacturer in the United States, was the first to mount its crane on crawler tracks during the 1920s. It described the new machinery as a "locomotive crane, independent of tracks and moveable under its own power." By the middle part of the nineteen twenties, crawler tracks had become the chosen means of traction for heavy crane operations.
The Speedcrane
The Moore Speedcrane, developed by Charles and Ray Moore of Chicago, Illinois was among the first attempts to replicate the rails for cranes. Manufactured within Fort Wayne, Indiana, the Speedcrane was fifteen ton, steam-powered, wheel-mounted crane. During 1925, a company called Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the potential and the marketability of the tracked crane. They decided to team up with the Moore brothers so as to manufacture it and go into business.
Crown has made their RC 5500 Series to concentrate on the realistic challenges faced in the workplace. This ground-breaking unit features intelligent technology and best-in-class ergonomics and comfort. Keeping the operator safe and comfortable normally results in more productivity.
3-Wheel Stand-Up Counterbalanced Truck
The company manufactures a 3-Wheel Stand-Up Counterbalanced Truck in capacities varying from 3000, 3500\three thousand five hundred and four thousand lb. capacity.
Performance Versatility
Crown's RC 5500 have been designed to work efficiently in a busy work environment. Whether it is operating on the dock or in an aisle, this unit achieves greatness. It has been designed to provide the operator unmatched visibility, unparalleled ride control and the best ergonomics. The exclusive FlexRide technology provided by Crown offers a suspended floorboard so as to eliminate a lot of the vibration and shock that operators should work with on a daily basis. Interestingly enough, many of the competitor's sit-down truck models are unable to match the reduced impact levels provided by the RC 5500 Series.
Visibility - Maximum visibility is provided for the operator from a side-stance position in both directions of travel. A low-profile provides a clear view mast as well a sculpted chassis enables the operators to be able to clearly see the fork tips, all around the truck and the fender. This optimum view lessens damage and enhances overall safety.
Speed - Top travel speeds are among the best within the business and achieved through Access 1 2 3 Technology combined with the latest AC traction control. Performance levels are able to be custom tuned to be able to match the application requirement or the operator's skill level.
Operator Safety & Comfort
The suspended floorboard offered by Crown's FlexRide greatly enhances overall work performance by enhancing comfort and fatigue is greatly lessened. The constant vibration and shock can cause severe operator fatigue for those exposed to those motions on a daily basis specially during travel over dock plates, expansion joints and rough floors.
