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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. Since this crane is self-propelled, it can move around certain work sites without the need for a lot of set up. Due to their huge weight and size, crawler cranes are fairly costly and even hard to transport from one location to another. The crawler's tracks provide stability to the equipment and allow the crane to function without the use of outriggers, although, there are some models that do utilize 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 specially made short rail lines. When the 20th century arrived, the crawler tractor changed and this brought the introduction of crawler tracks to the construction business as well as the agricultural business. Not long after, the crawler tracks were adopted by excavators 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
In the 1920s, Northwest Engineering, a crane company in the United States, mounted its very first crane on crawler tracks. 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 operations.
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. Made within Fort Wayne, Indiana, the Speedcrane was a wheel-mounted, steam-powered, 15 ton crane. In the year 1925, 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 in order to manufacture it and go into business.
Crown has made their RC 5500 Series to focus on the realistic challenges faced 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 company manufactures a 3-Wheel Stand-Up Counterbalanced Truck in capacities ranging from 3000, 3500\three thousand five hundred and 4000 lb. capacity.
Performance Versatility
Crown's RC 5500 have been designed to work effectively in a busy work setting. Whether it is operating in an aisle or on the dock, this unit achieves greatness. It has been designed to provide the operator unparalleled ride control, unmatched visibility and the best ergonomics. The exclusive FlexRide technology offered by Crown provides a suspended floorboard so as to eliminate much of the vibration and shock which operators must work with on a daily basis. Interestingly enough, many of the competitor's sit-down truck units are unable to match the reduced 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 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 improves overall safety and reduces damage.
Speed - Through Access 1 2 3 Technology combined with the latest AC traction control, top travel speeds are amongst the best within 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
The suspended floorboard provided by Crown's FlexRide significantly enhances overall work performance by enhancing comfort and exhaustion is greatly reduced. The constant vibration and shock can result in extreme operator fatigue for those exposed to those motions everyday particularly during travel over dock plates, expansion joints and rough surfaces.
