skid steering (driving one track only) and counter-rotating steer. Some models of crawler cranes have a swing-travel jaw clutch that is controlled by one lever Figure 12-5.≼rawler-mounted crane quadrants of operation. Swing circle: Single-row ball bearing with an integral internally cut swing gear. NOTE: Consult the operators manual for detailed in- formation if required to track travel for more than 1 mile, Steering of the crawler crane is performed by engaging the steering lever in the direction you want the crane to turn. 9km/h MAIN DEMENSIONS Overall dimension ( LxWxH) 2770x896x2340 mm Total length of track 1235mm Platform ground clearance 370 mm Platform back turning radius. When travel distance exceeds 1 mile, transport the crawler by tractor-trailer. Additionally, traveling the crane a long distance at one time causes extra wear to the tracks. Because of the slow travel speed, it is not productive to try to travel more than 1 mile. The turning radius of the crawler crane is about the length of the tracks, which travel 1/2 to 2 mph. When the crawler crane is climbing grades, the maximum grade capability is 30 percent on firm, dry material. This feature gives the crawler crane a low ground bearing pressure of 5 to 12 psi, giving the crane the versatility needed to travel over soft terrain. The size of the crawler treads spreads the weight of the crane over a large area. Also, the crawler crane has steering with positive traction that permits the crawler crane to travel and turn without cutting up the work area or roadway. The primary advantage of the crawler crane over the truck-mounted crane is that it is better suited for continuous work in remote areas that are not readily accessible to truck-mounted cranes because of terrain conditions. What is crane swing radius The swing radius is the entire circle from a given point that parts of the equipment may move within.

Crane turning radius