Analysis and treatment of common faults of variable speed control valves of Carter loaders
I. Introduction. As a kind of heavy machinery widely used in construction, mining, ports and other industries, the variable speed control valve of Carter loader is a key component to achieve the variable speed function. However, in the actual use process, the variable speed control valve may have various failures, affecting the normal operation of the loader. In this paper, we will analyze the common faults of the variable speed control valve of Carter loader and propose corresponding treatment methods.
Second, the common failure of the variable speed control valve of the Carter loader.
1.The variable speed control valve is out of order.
Variable speed control valve failure may be caused by blocked oil circuits, stuck spools, etc. When the variable speed control valve fails, the loader cannot shift normally, affecting the operation efficiency.
2.Oil leakage from the variable speed control valve.
Oil leaks from variable speed control valves can be caused by aging, wear, etc. When the variable speed control valve leaks, the oil will leak to the hydraulic system, causing the pressure of the hydraulic system to drop, affecting the normal operation of the loader.
3. Handling methods for common faults of variable speed control valves of Carter loaders.
1.How to deal with the failure of the variable speed control valve.
First of all, check whether the oil circuit is blocked, if you find that the blockage is found, clean the oil circuit in time. Secondly, check whether the valve core is stuck, if the stagnation phenomenon is found, disassemble the variable speed control valve for cleaning. At the same time, check whether the spring of the variable speed control valve is damaged, if it is damaged, it needs to be replaced.
2.How to deal with oil leakage from variable speed control valve.
First of all, check whether the seal is aged and worn, and replace the seal in time if aging and wear are found. Secondly, check whether the installation of the variable speed control valve is correct, and reinstall the variable speed control valve if it is found that the installation is incorrect. At the same time, check whether there is pressure loss in the hydraulic system, and repair the hydraulic system in time if the pressure loss phenomenon is found.
IV. Conclusions. 
The common faults of the variable speed control valve of the Carter loader mainly include failure and oil leakage. These faults can be dealt with by cleaning the oil circuit, cleaning the variable speed control valve, replacing the seals, reinstalling the variable speed control valve, and repairing the hydraulic system. In the actual operation process, we should choose the appropriate treatment method according to the specific situation to ensure the normal operation of the loader. At the same time, in order to reduce the failure rate of the variable speed control valve, we should regularly maintain and maintain the loader to ensure that it is in good working condition.