Machining accuracy due to the impact, causing the main valve radial clamping, do not open the main valve on the pressure or primary pressure relief valve is not closed, and the other due to pollution caused by radial clamping. Relief in the use of the regulator failures that sometimes occur. Pilot relief valve regulator failures that have two kinds of situations: one is to adjust the pressure regulator handwheel can not be established, Hanzhong hydraulic maintenance, or pressure is less than the nominal value; the other hand wheel adjustment pressure does not drop, hydraulic repair factory, and even continue to boost. It appears regulator failure, in addition to the spool due to various causes radial clamping, the hydraulic repair aftermarket, as well as some of the following reasons: By this analysis, hydraulic repair prices can accurately obtain important information about the terms of wear of the system. According to further study abrasion, wear condition monitoring, predictive failure diagnosis, and finally to system failure prediction. Hydraulic repair prices _ _ Xi'an-Hanzhong hydraulic maintenance through hydraulic service provided by the Xi'an Chengtong hydraulic maintenance Limited. Xi'an-hydraulic-repair Ltd. (www.huosu360.com) strong, credible, in Xi'an of industrial maintenance, installation and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Xi'an-hydraulic service and you work through into the brilliant, for a better future!