Hydraulic system generally in the operation of 2000h after the need to replace the hydraulic oil, otherwise the system will be contaminated, resulting in system failure. According to statistics, about 90% of the hydraulic system failure is caused by system contamination.
In checking the color of the oil, viscosity, odor, but also to detect the oil pressure, air humidity. If the work at a higher altitude, lower temperature environment, but also must pay close attention to the engine oil carbon content, gum (olefin) and sulfide, as well as diesel impurities, paraffin and water content.
Special circumstances, if the mechanical use of low-grade diesel fuel (diesel fuel sulfur content of 0.5% ~ 1.0%), should be replaced every 150h - - diesel fuel filter, filter; sulfur content of 1.0% should be replaced every 60h diesel fuel filter, filter. When using equipment with large load on hydraulic system such as crusher and vibrating rammer, the replacement time of hydraulic oil return filter element, pilot filter element and breather filter element should be replaced every 100h.