Many high-altitude operation car users in use, often appear lifting platform can not rise fault, so in this case, how should we do? The following special steam network for everyone to analyze the reason! The hydraulic system is the main factor that causes the lifting platform to not rise in the high altitude operation. The situation is as follows: 1. The hydraulic circuit is not working. The hydraulic circuit is blocked refers to the hydraulic pipeline, hydraulic oil can not reach the hydraulic cylinder. Hydraulic circuit blockage is mainly in the hydraulic system of each valve (one-way globe valve, reversing valve, regulating valve, etc.), leading to valve blockage reasons are: hydraulic oil dirty, hydraulic oil with solid particles, resulting in valve jam or blockage; Valve mechanical reasons lead to the valve can not open, valve blockage; Solenoid valve or regulating valve electrical part causes the valve to open. 
2. The hydraulic system pressure is too low, resulting in the hydraulic lifting platform can not lift. The main reasons for the low pressure of the hydraulic system are: the relief valve is damaged or the set value is too low, especially after the overhaul and adjustment of the set value of the relief valve, due to improper adjustment, it is easy to have the small set value of the relief valve, resulting in the low pressure of the system. When the relief valve is damaged, the system pressure is also too low. Serious leakage of the hydraulic system will also lead to low pressure of the hydraulic system, such as serious oil leakage of the hydraulic pipeline and the oil cylinder, it will also lead to low pressure of the hydraulic system, and the lifting platform can not rise with load in high altitude operation. The above questions all know! Hope that in order to safety issues, the owner of the high-altitude working car should also often overhaul the car oh!
