Truck-mounted crane telescopic booms commonly move slowly, making waiting tedious. CNS explains the causes and solutions below.
It seems that the telescopic booms of truck-mounted cranes all have a common problem, that is, they move rather slowly. Maybe the waiting process for us is very boring. So, what causes the telescopic boom to move slowly? Is there a solution? The following is the answer provided by CNS.
The reasons for the slow telescopic boom of a truck-mounted crane: 1. Some cranes are designed in this way. For safety and to protect the boom. 2. There is a speed limit for the car chassis during driving, usually 100km/h. If the crane is slow, the speed of the crane can be controlled by adjusting the accelerator pedal. 3. After the telescopic boom of the crane extends outward, when the telescopic rocker is in a negative correlation, it will gradually contract under heavy load. 4. When choosing a truck-mounted crane, three major factors must be taken into account: the vehicle chassis, the crane, and the cargo box. At the same time, the application environment should also be considered. For a wide working environment, a straight boom truck-mounted crane can be selected, while for a narrow working environment, a folding boom truck-mounted crane can be chosen.
Solution to the problem of slow telescopic boom of truck-mounted cranes: 1. When conducting fault detection, it is usually necessary to understand the basic principle of hydraulic system operation based on the telescopic mechanism of the truck-mounted crane. When the rocker is in a negative correlation, since the static balance valve is closed, the oil in the rodless chamber is sealed by the static balance valve to prevent leakage. The telescopic hydraulic system is in a stationary state. Only when there is an abnormality in the static balance valve or the seal of the hydraulic cylinder will the lifting boom slowly retract. 2. When disassembling and assembling, be sure to loosen it slowly and release the hydraulic oil and working pressure slowly to prevent high-pressure oil from spraying out and causing injury. Second, completely remove the two pipes and get rid of the connection heads to prevent the oil discharged from the control valve from causing fraud in the identification. 3. It might be that this galvanized steel wire rope has been in use for too long, or that this vehicle has been in use for too long. Therefore, it is quite common for the boom speed to slow down, and thus it should be inspected and repaired.
The above is what CNS has shared with you about "slow telescopic boom of truck-mounted Crane". We hope it can be helpful to you. In fact, slowness also has its advantages. This can ensure safety during operation, but going too fast may also cause certain safety hazards.
