The advantage of the jib crane is that it can be suitable for various environments, and it can also complete our work requirements in a small space. Below, I will introduce to you what are the common faults of its boom telescopic mechanism.
The common failures of the boom telescopic mechanism of the cantilever crane are:
1. The telescopic arm sometimes shakes and makes abnormal noises when telescopic;
2. Sometimes the telescopic arm cannot retract or the telescopic arm automatically sinks. The orifice of the balance valve is blocked or the spring in the balance valve is deformed. When the telescopic cylinder is running, there will be noises between the piston and the cylinder, the piston rod and the guide sleeve, and it is often accompanied by crawling and vibration. The gap between each section of the telescopic arm and the nylon sleeve is small, the box-shaped telescopic arm is twisted and deformed, the deflection error is large, the slider between the telescopic arm and the basic arm is poorly lubricated and the slider is severely worn. The sound of the steel rope telescopic system may be caused by friction between the steel rope and the telescopic arm or between the pulley and the shaft.