(L) keep the hydraulic system clean and remove sludge and metal debris from the tank in a timely manner. (2) changing oil according to the reference index of oil change, the parts of the equipment should be cleaned to prevent impurities from mixing into the oil and affecting the use effect. (3) containers and refueling tools must be cleaned during storage and use to prevent contamination of oil products. (4) the oil product is mainly suitable for hydraulic oil pump of steel-steel friction pair. For hydraulic oil pumps of friction pairs of other materials, the oil pump manufacturer or oil supply unit must recommend the applicable oil pump load limit.