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The crawler crane is a specific kind of mobile crane that is offered with either a telescopic boom or a lattice boom which moves upon crawler tracks. Since this model is a self-propelled crane, it could move around a jobsite and accomplishing jobs without much set-up. Due to their enormous size and weight, crawler cranes are are difficult to transport from one place to another and are rather expensive. The crawler's tracks offer stability to the machine and enable the crane to work without the use of outriggers, however, there are some units that do use outriggers. Also, the tracks provide the equipment's movement.
Early Mobile Cranes
The very first mobile cranes were initially mounted to train cars. They moved along short rail lines that were particularly constructed for the project. Once the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the construction business and 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 Very First Crawler Crane
Northwest Engineering, a crane manufacturer in the United States, was the very first to mount its crane on crawler tracks in the nineteen twenties. 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 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 in Fort Wayne, Indiana, the Speedcrane was 15 ton, steam-powered, wheel-mounted crane. In nineteen twenty five, a company referred to as 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 to be able to manufacture it and go into business.
The Crown RC 5500 Series was made on a vision that concentrates on realistic challenges in the workplace. This ground-breaking model features best-in-class comfort and ergonomics and intelligent technology. Keeping the operator comfortable and safe generally results in more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The 3-Wheel Stand-Up Counterbalanced Truck comes in 3000, 3500 and 4000 pound capacity.
Performance Versatility
The Crown RC 5500 excels in a busy work environment. This model achieves greatness whether it is operating on the dock or in an aisle. It is made to offer the operator unparalleled ride control, unmatched visibility and the best ergonomics. The exclusive FlexRide technology offered by Crown provides a suspended floorboard in order to eliminate a lot of the shock and vibration that operators must work with each and every day. Interestingly enough, a lot of the competitor's sit-down truck units are unable to 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 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 lessens damage and improves overall safety.
Speed - Top travel speeds are amongst the best within the industry and achieved through Access 1 2 3 Technology combined with the latest AC traction control. Levels of performance are able to be custom tuned to be able to match the operator's level of skill or the application requirement.
Operator Safety & Comfort
Crown's FlexRide has a suspended floorboard that could greatly enhance the overall work performance of the employee by improving their comfort and reducing their exhaustion. The continuous vibration and shock can cause severe operator fatigue for those exposed to those motions on a daily basis especially during travel over expansion joints, rough surfaces and dock plates.
