(Continued a) 7. device driver must do routine maintenance, repair and maintenance work, good equipment in the Daily Record, Tai'an best excavators school, found the vehicle in question, can not be sick job excavators school, and timely reporting repairs. 8. It must be done in the cab clean and tidy, Tai'an excavators school phone, keep the body surface clean, no dust, no oil; develop clean the car after work habits. Cylinder piston rod hydraulic oil leakage reasons ① trauma - hard object collisions, extrusion and rolling friction or other injuries slump matter; ② surface erosion - chemical substances (chlorides, sulfides, acid, gas, etc.) contaminated In the plating surface, appear white spots; ③ paint - so dust ring with a U-shaped sealing edge bite occurs; ④ bending - improper operation or abnormal use due; ⑤ stretch - improper operation or abnormal use causing the piston rod into a conical screw at. Even nuts off. ⑥ welding sparks --1 Direct Indirect welding sparks flying sparks caused by welding; ⑦ shock spark - wire strike; ⑧ dust - not a long time, they did not carry out proper maintenance, the piston rod surface stickiness due to stolen goods (prior to use and not cleaning or washing is not clean, a working longer). Tai'an regular schools excavator | Kerry and excavators school (online consultation) | 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.