What are the maintenance requirements for anti-wear hydraulic oil quality change

For hydraulic oil, the first thing is to satisfy the requirements of the hydraulic device on the liquid viscosity under the working temperature and starting temperature, because the change of the oil viscosity is directly related to the hydraulic action, transmission efficiency and transmission accuracy, but also related to the viscosity temperature performance and shear stability. The lubricating oil should meet the requirements of different applications. What are the deterioration and protection requirements of hydraulic oil?
(1) Several possible conditions for contamination and deterioration of hydraulic oil
① The cooling water pipe or air water vapor condensate drops into the oil
② Poor working environment, dust mixed with oil in the air
③ In hydraulic system, all control elements grind metal powder into oil
④ If the hydraulic oil works for a long time at high temperature, it will oxidize, reduce the viscosity and accelerate the aging of sealing
⑤ In the maintenance process, the pipeline and all control elements were not cleaned, resulting in dirt mixed into the oil
(2) Precautions for anti wear hydraulic oil protection
① When filling the oil tank with pipelines, pay attention to all pipelines and control elements. Before entering the tank, clean them and filter them with filter screen
② The oil volume in the oil tank is enough, the liquid level is kept at the upper limit of oil dirt, the oil inlet is filled with oil and the back cover is tight, and the working environment is clean, ventilated and dry
③ Pay attention to arrange the sliding surface exposed by control elements to avoid dust pollution in the air. During maintenance, the removed pipes and control valves must be cleaned and reassembled,
④ Avoid oil contamination
⑤ Regularly check the quality of hydraulic oil, timely filter the impurities and metal powder in the oil, and exhaust the air. If necessary, replace the new oil, and refer to the quality regulations in the table