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The crawler crane is a specific type of mobile crane that is available with either a telescopic boom or a lattice boom that moves upon crawler tracks. Since this model is a self-propelled crane, it is capable of moving around a jobsite and completing tasks without much set-up. Due to their huge size and weight, crawler cranes are fairly pricey and even hard to transport from one place to another. The crawler's tracks offer stability to the machinery and enable the crane to work without utilizing outriggers, although, there are several models that do utilize outriggers. Moreover, the tracks provide the movement of the equipment.
Early Mobile Cranes
The first mobile cranes were originally mounted to train cars. They moved along short rail lines that were specially built for the project. Once the 20th century arrived, the crawler tractor evolved and this brought the introduction of crawler tracks to the construction industry and the agricultural business. Not long after, excavators adopted the crawler tracks and this further showcased the versatility of the equipment. It was not long after before manufacturers of cranes decided that the crawler track market was a safe bet.
The First Crawler Crane
Around the 1920s, Northwest Engineering, a crane manufacturer within the United States, mounted its very first crane on crawler tracks. It described the new machinery 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. Made within Fort Wayne, Indiana, the Speedcrane was fifteen ton, steam-powered, wheel-mounted crane. During 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 to be able to produce it and go into business.
The Crown RC 5500 Series was made on a vision that focuses on realistic challenges within the workplace. This ground-breaking unit features best-in-class ergonomics and comfort and intelligent technology. Keeping the operator comfortable and safe generally results in more efficiency.
3-Wheel Stand-Up Counterbalanced Truck
The company manufactures a 3-Wheel Stand-Up Counterbalanced Truck in capacities varying from three thousand, 3500\three thousand five hundred and 4000 pound capacity.
Performance Versatility
Crown's RC 5500 have been made to work effectively in a busy work setting. Whether it is operating on the dock or in an aisle, this unit achieves greatness. It has been made to offer the operator unparalleled ride control, unmatched visibility and the best ergonomics. The exclusive FlexRide technology provided by Crown provides a suspended floorboard in order to eliminate much of the shock and vibration that operators must work with each day. Interestingly enough, a lot of the competitor's sit-down truck units are unable to match the reduced impact levels provided by the RC 5500 Series.
Visibility - From a side-stance position in both directions of travel, this unit provide maximum visibility for the operator. A low-profile offers a clear view mast as well a sculpted chassis allows the operators to be able to clearly see all around the truck, the fender and the fork tips. This optimum view enhances overall safety and lessens damage.
Speed - Top travel speeds are amongst the best in the industry and achieved through Access 1 2 3 Technology combined with the latest AC traction control. Levels of performance could be custom tuned in order to match the application requirement or the operator's skill level.
Operator Safety & Comfort
The suspended floorboard provided by Crown's FlexRide significantly improves overall work performance by enhancing comfort and fatigue is significantly lessened. The continuous vibration and shock could lead to severe operator exhaustion for those exposed to those motions on a daily basis especially during travel over expansion joints, rough floors and dock plates.