Crane Parts - Truck crane boom telescoping mechanism failures

Crane Parts - common problems with the crane boom elastic tissue: one is elastic arm elastically sometimes appear abnormal sound vibrate and announced; the second is the flexible arm can not be retracted or sometimes sink resilient arms initiative. One. Analyze a cause of the malfunction, the elastic rope system announced sound, perhaps generated by a conflict between the rope and the elastic arm or between the pulley and the shaft. Gap 2, sections resilient arm and nylon jacket is small, box-shaped resilient arm distorted deformation, deflection error is large, resilient arm and simply slide between the arms and the smooth bad slider severe wear, etc. will be announced sound. 3, will announce the sound between the piston and the cylinder, the piston rod and guide sleeve elastic cylinder operation, and often accompanied by creeping and oscillation appearance. 4, inner balance valve orifice obstruction or balancing stretched spring deformation. II. View and Solution 1. If the above view are not in doubt, the individual should be viewed, if presented fibrillation elastic elastic arm and declared sound, first, we should see a smooth surface condition of conflict between the elastic arm and the fundamental arm and slide wear condition . Necessary coated with butter or replaced with a new slider and adjust the gap between the slider and the resilient arm. Second, idler pulley view on the elastic cylinder is not good, without a doubt, when then view the elastic cylinder elasticity or without sound, creeping or oscillations. Again, if the elastic cylinder normal, and then view the elastic balancing cylinders, if the internal valve stretched spring fatigue deformation, but also make the elastic arm is trembling and declared sound, you can now replace the stretched spring. If more than 3 2, when the former exhibits a fault, you should review the operation of hydraulic car, do not increase the throttle control lever elasticity, oil pressure gauge investigation, if oil rises to clarify the elastic cylinder balancing valve orifice blocked, must be removed to clean and eliminate damp hole blockage; if oil pressure does not rise, but when the throttle oil demand was able to reach the job, you can determine whether the pump is out of order. See all normal, ultimately view elastic rope system, remove the outriggers and shrink cable arm alone resiliently flexible arm cylinder femoral artery, if the elastic elastic arm itself without wobbling or sound, when fitted with outriggers and reduced arm pull When the test again after the elastic cord, if outriggers presented fibrillation or declared sound, the reason probably lies in the rope elastic system. Check outriggers must first rope or cord compression arm length, tension level, and conditioning fixed jib rope or cord compression arm nut to balance; then view the outrigger arm pulley sheaves or shrink smooth condition and pulley bush The wear condition, in season, plus a smooth coating grease or replace worn bushings; final view overhanging the pulley shaft is not scrolled, if scrolling, plus positioning fence shall limit its roll. 3. If the boom can not be retracted, should first check the fuel tank, when entering the job status of all the organizations, together elastic cylinder fully extended, if the lack of oil will affect the pump operation, so that can not be retracted outriggers, Then make luffing cylinder retraction click. Valves defective or tubing in the air is the major reason can not be retracted outriggers, if the leak occurred due to intake pipe and intake, may first remove leak, then repeat pull or push the lever, the gas along the return line back to the tank; If balancing valve defective shall slowly unscrew the inlet to the lower chamber from balancing hollow bolt, so that the elastic cylinder lower chamber hydraulic fluid gradually flows out from the joint gap, then the elastic arm will automatically retract under gravity effect and then Check Valves control the oil port hole is not blocked. http://www.xzshengsen.com/