(Continued a) 4) diverter valve malfunction Tai'an excavators school phone, open prematurely. Check valve spring is not deformed or failure of Tai'an best schools excavator, excavator insufficient spring force if the school can increase the gasket between the spring and the seat. (5) spool and sleeve deformation, can cause both stuck. We shall go into the oil mouth of a small amount of hydraulic oil before filling installed, turn the valve should be flexible and comfortable, if catching phenomenon to be polished. Which sometimes Tai'an schools excavator strong, uneven force when tightening the steering gear bolts at the bottom, there will spool is stuck phenomenon, the correct approach is 2-3 times evenly tighten the bolts. Excavators are the main cause of slope collapse (1) of rain, groundwater or construction of water infiltration slope; so that the weight of the soil increases, and reduce the shear capacity; (2) the pit slope too steep to stay so the stability of the soil itself is not enough to produce landslides Ya; bulldozers or parking lot nearby equipment (3) pit edge, so that the soil shear stress generated in excess of the shear strength of the soil. Tai'an regular schools excavator | Kerry and excavators school (certified) | schools excavator by 泰安嘉 and Heavy Machinery Co., Taian Jia and Heavy Machinery Co., Ltd. (www.tajhzg.com/) is Tai'an, mining machinery leaders, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Heavy leader in Kerry and the staff warmly welcome all inquiries negotiations to create Kerry and heavy industry a better future.