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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. Since this crane is self-propelled, it could move around certain work sites without the need for a lot of set up. Because of their huge size and weight, crawler cranes are are hard to transport from one place to another and are rather pricey. The crawler's tracks provide the machine stability and allow the crane to function without the use of outriggers, although, there are some models which do use outriggers. As well, the tracks provide the movement of the machinery.
Early Mobile Cranes
The very first mobile cranes were initially mounted to train cars. They moved along short rail lines which were particularly built for the project. Once the 20th century arrived, the crawler tractor changed and this brought the introduction of crawler tracks to the construction industry as well as the agricultural business. Not long after, excavators adopted the crawler tracks and this further featured the machine's versatility. It was not long after before crane companies decided that the crawler track market was a safe bet.
The Very First Crawler Crane
Northwest Engineering, a crane company within the USA, was the first to mount its crane on crawler tracks in the 1920s. It described the new machine 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
Developed by Charles and Ray Moore of Chicago, Illinois; the Moore Speedcrane was amongst the first to attempt to replicate rail lines for cranes. Manufactured within Fort Wayne, Indiana, the Speedcrane was fifteen ton, steam-powered, wheel-mounted crane. In nineteen twenty five, a company referred to as Manitowoc Shipbuilding Co, from Manitowoc, Wisconsin recognized the tracked crane's potential and marketability. They decided to team up with the Moore brothers in order 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 comfort and ergonomics. Keeping the operator safe and comfortable usually results in more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The 3-Wheel Stand-Up Counterbalanced Truck comes in 3000, 3500 and four thousand pound capacity.
Performance Versatility
The Crown RC 5500 excels in a busy work environment. This unit achieves greatness whether it is operating in an aisle or on the dock. It is designed to provide the operator unparalleled ride control, unmatched visibility and the best ergonomics. The exclusive FlexRide technology offered by Crown offers a suspended floorboard in order to eliminate a lot of the shock and vibration that operators should work with on a daily basis. Interestingly enough, a lot of the competitor's sit-down truck units can not match the lessened impact levels offered 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 offers a clear view mast as well a sculpted chassis enables the operators to be able to clearly see the fender, the fork tips and all around the truck. This optimum view reduces damage and improves overall safety.
Speed - Top travel speeds are among the best in the business 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 application requirement or the operator's level of skill.
Operator Safety & Comfort
The suspended floorboard offered by Crown's FlexRide greatly improves overall work performance by enhancing comfort and fatigue is significantly lessened. The continuous shock and vibration could cause extreme operator fatigue for those exposed to those motions on a daily basis especially during travel over expansion joints, rough floors and dock plates.