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The crawler crane is a specific kind of mobile crane which is available with either a lattice boom or a telescopic boom which moves upon crawler tracks. Because this unit is a self-propelled crane, it is capable of moving around a jobsite and accomplishing tasks without much set-up. Because of their huge size and weight, crawler cranes are fairly costly and even difficult to transport from one site to another. The crawler's tracks provide stability to the machinery and allow the crane to function without utilizing outriggers, however, there are several units which do use outriggers. Moreover, the tracks provide the movement of the machine.
Early Mobile Cranes
Originally, the first mobile cranes were mounted to train cars and move along specifically designed short rail lines. When the 20th century arrived, the crawler tractor changed 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 machine. It was not long after before manufacturers of cranes decided that the crawler track market was a safe bet.
The Very First Crawler Crane
In the nineteen twenties, Northwest Engineering, a crane manufacturer within the United States, mounted its first crane on crawler tracks. It described the new machine as a "locomotive crane, independent of tracks and moveable under its own power." By the mid-1920s, 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 copy the rails for cranes. Manufactured in Fort Wayne, Indiana, the Speedcrane was a wheel-mounted, steam-powered, 15 ton crane. In nineteen twenty five, a company known as 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 to be able to manufacture it and go into business.
Crown has designed their RC 5500 Series to focus on the realistic difficulties experienced in the workplace. This ground-breaking model features intelligent technology and best-in-class comfort and ergonomics. Keeping the operator comfortable and safe usually leads to more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The 3-Wheel Stand-Up Counterbalanced Truck comes in three thousand, three thousand five hundred and four thousand lb. 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 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 much of the vibration and shock which operators need to work with each day. 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 all around the truck, the fender and the fork tips. This optimum view reduces damage and enhances overall safety.
Speed - Through Access 1 2 3 Technology combined with the newest AC traction control, top travel speeds are among the best in the industry and achieved. Levels of performance can be custom tuned to be able to match the application requirement or the operator's level of skill.
Operator Safety & Comfort
Crown's FlexRide has a suspended floorboard which can greatly enhance the overall work performance of the employee by improving their comfort and lessening their exhaustion. The constant shock and vibration can cause extreme operator exhaustion for those exposed to those motions everyday especially during travel over expansion joints, rough grounds and dock plates.