How the hydraulic lifting platform maintenance and repair? (2)

At room temperature under atmospheric pressure containing a volume of hydraulic oil in the ratio of 6 to 8% of the air, the pressure is reduced when the air is freed from the oil, the hydraulic components bubble burst "cavitation" generated noise. A lot of air into the oil will cause "cavitation" phenomenon intensified, hydraulic oil compressibility increases, job insecurity, reduced efficiency, implementation of components appear to work "crawl" and other adverse consequences. The air also causes oxidation of the hydraulic oil to accelerate deterioration of the oil. Prevent air intrusion should note the following:
1, according to a random repair and oil change of the scissor lift after "manual" for excluding air from the system to normal operation.
2, the hydraulic pump suction nozzle shall not be exposed oil surface, the suction line must be sealed well.
3, the pump shaft seal should be good to pay attention to where the seals should be replaced using the "lips" Authentic seals, can not use "single lip" seal instead, because "single lip" seal only one-way seal oil, does not have sealing gas functions. The unit had a major overhaul after Liugong ZL50 loaders, hydraulic pump in a row, "cavitation" noise, such as elevated oil tank automatic fault, hydraulic pump repair process upon inquiry found that the hydraulic pump drive shaft seal is the misuse "single lip "seal due.
Hydraulic system to prevent water intrusion
Oil contains excess moisture, hydraulic components will rust, oil emulsion deterioration, reduced lubricant film strength, speed mechanical wear. Except when maintenance to prevent moisture intrusion, but also pay attention to oil tank when not in use, to tighten the lid, the most good upside down; the moisture content may be several large oil filters, each filter should be replaced once a dry filter paper, in the absence of special instruments to detect, can be droplets onto a hot iron, do not smoke and vapor Now combustion can only raise.
Mechanical operations should be soft ride
Mechanical operations should avoid rough, this would certainly have an impact load, so that a mechanical failure-prone, greatly shorten life. Impact load generated during operations, on the one hand the mechanical structure of early wear, fracture, broken, on the one hand to make an impact pressure of the hydraulic system, the pressure will make the shock damage hydraulic lift components, seals and laminated at high pressure tubing and hose fittings premature failure of the oil spill or burst pipes, rising oil spill frequent movement.