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The mobile crawler crane is specific crane designed with either a telescopic boom or a lattice boom. These move upon the crawlers tracks. As this crane is self-propelled, it could move around particular work sites without the need for a lot of set up. Due to their huge size and weight, crawler cranes are fairly costly and even difficult to transport from one location to another. The crawler's tracks provide the machinery stability and allow the crane to function without the use of outriggers, although, there are several units which do use outriggers. Furthermore, the tracks provide the movement of the machine.
Early Mobile Cranes
Originally, the very first mobile cranes were mounted to train cars and move along specially built short rail lines. When the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the construction business as well as the agricultural industry. Not long after, excavators adopted the crawler tracks and this further featured the equipment's versatility. It was not long after before manufacturers of cranes decided that the crawler track market was a safe bet.
The First Crawler Crane
Northwest Engineering, a crane company within the USA, was the first to mount its crane on crawler tracks during the 1920s. It described the new equipment as a "locomotive crane, independent of tracks and moveable under its own power." By the mid-1920s, crawler tracks had become the preferred means of traction for heavy crane uses.
The Speedcrane
Developed by Ray and Charles Moore of Chicago, Illinois; the Moore Speedcrane was one of the first to attempt to replicate rail lines for cranes. Manufactured within Fort Wayne, Indiana, the Speedcrane was a steam-powered, wheel-mounted, fifteen ton crane. During 1925, a company called Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the marketability and the potential of the tracked crane. They decided to team up with the Moore brothers in order to produce it and go into business.
Crown has designed their RC 5500 Series to focus on the realistic difficulties experienced within the workplace. This ground-breaking unit features intelligent technology and best-in-class ergonomics and comfort. Keeping the operator comfortable and safe usually results in more productivity.
3-Wheel Stand-Up Counterbalanced Truck
The company manufactures a 3-Wheel Stand-Up Counterbalanced Truck in capacities ranging from 3000, 3500\three thousand five hundred and 4000 pound capacity.
Performance Versatility
The Crown RC 5500 excels in a busy work environment. This unit achieves greatness whether it is operating on the dock or in an aisle. It is made to provide the operator unmatched visibility, unparalleled ride control and the ultimate ergonomics. The exclusive FlexRide technology provided by Crown offers a suspended floorboard so as to eliminate a lot of the shock and vibration that operators have to work with each day. Interestingly enough, many of the competitor's sit-down truck units are unable to match the lessened impact levels provided by the RC 5500 Series.
Visibility - Maximum visibility is offered 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 allows the operators to be able to clearly see the fender, the fork tips and all around the truck. This optimum view reduces damage and enhances overall safety.
Speed - Top travel speeds are amongst the best within the industry and achieved through Access 1 2 3 Technology combined with the newest AC traction control. Performance levels are able to be custom tuned in order to match the operator's level of skill or the application needs.
Operator Safety & Comfort
The suspended floorboard provided by Crown's FlexRide greatly improves overall work performance by improving comfort and fatigue is significantly reduced. The continuous shock and vibration can result in severe operator fatigue for those exposed to those motions on a daily basis especially during travel over expansion joints, rough surfaces and dock plates.
