Find the cause of the fault from the following three points in the maintenance, and system improvements: Check the boom cylinder internal leakage situation. The easiest way is to raise the boom, to see whether there is a significant decline in freedom. If you disassemble the fuel tank to check the whereabouts of obvious, such as worn seals should be replaced. Check the control valve. First clean the safety valve, check valve wear roller hydraulic repair quote, such as wear and tear should be replaced. If there is still no change after the valve is installed, and then check the control valve spool wear roller hydraulic repair, the gap is generally limits the use of 0.06mm, badly worn should be replaced. Washing process, the system detects cleanliness roller hydraulic repair price, cleanliness of the system during normal operation (NAS or ISO 4406): determined according to the device manufacturer's requirements. Such as equipment manufacturers no clear requirements, it is recommended not less than ISO4406 17/14 or NAS 8 levels. Flush the system goal Cleanliness: during normal operation than two orders of magnitude. As normal working hours for NAS 8 级 roller hydraulic repair how, then rinse the target cleanliness should NAS 6 levels. Cleanliness testing: in the laboratory for, may also have a portable detector cleanliness spot detection. Below is PALL portable contamination tester, by Mobil engineers on-site testing. Cleanliness testing period: according to the site specific formulation. Hydraulic roller maintenance organizations, Xi'an Chengtong hydraulic repair, hydraulic repair roller Yan'an Xi'an Chengtong hydraulic repair Limited. Xi'an Chengtong Hydraulic Maintenance Co. (www.huosu360.com) is Xi'an, industrial maintenance, installation of leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In Xi'an Chengtong hydraulic service leadership with the staff warmly welcome all inquiries negotiations to create Xi'an Chengtong hydraulic repair a better future.