loading挖掘机介绍（Excavator introduction）
挖掘机介绍(Excavator introduction)
The excavator is an integrated high-tech product of
\high technical performance requirements, and the construction
environment is bad, and sometimes it can fail. Some just plug loose some faults, such as excavator computer can be detected oneself, due to the maintenance technician can't arrive the construction site, if you have relevant guidance books, troubleshooting, the driver can timely and accurately to avoid unnecessary economic losses. The maintenance of excavator failure, in a sense, needs to understand the overall structure and working principle of excavators. The process of fault diagnosis is a process of comprehensive analysis and judgment of the various appearance and inner phenomena of excavators. Familiar with these phenomena, and able to distinguish some of the non-normal phenomena, use relevant knowledge and experience to make correct judgment, repair and emergency treatment.
Book mainly komatsu 200-6, 450, daewoo, Hitachi 220-5 series hydraulic excavator as an example, to explain the use of common and typical phenomenon of the failure of early diagnosis and elimination method, characteristics, reasons, in order to help the car and excavator maintenance staff to solve some often occurs in actual use and maintenance or occasionally the specific problems, and to excavator
using one of the most common faults and the most basic solution as the main content.
In the process of writing this book got Wei Xixin senior professor at tsinghua university, Japan's sumitomo construction machine, senior technical experts tadao ando
constant male, hefei branch work senior engineer ChuChengMing excavator repair factory, tianjin chienchung hydraulic repair shop chienchung when senior engineer, hangzhou hongchang excavator repair factory senior engineer Wei Zhongqing, jun construction machinery co., LTD., senior technician in jinan, and chuan-liang shen, hongchang import machinery repair center in jiangsu senior engineer pick up health and senior technician Yuan Tangwei, lei,, Xu Xiping, establish resplendence ardently NieChangXun and other people's strong support, we express our heartfelt thanks to you for this.
The first part is modern 200-5 Chapter I hydraulic system
Section 1 construction of hydraulic system 1. Installation of hydraulic pump unit 2. Main hydraulic pump Working principle Iv. Oil flow
Section 2 main control valve I. structure and characteristics Basic functions of main control valve
Section iii principles of work One, the big arm working principle Load check valve 3. Overflow valve
The working principle of the orifice overflow valve
5. The function of oil replenishing during the working period of the large arm
Fault analysis of main overflow valve and oil outlet overflow valve The position of the overflow valve 8. Logical valve Logical one-way valve
10. Troubleshooting of logical and logical check valves 11. Bottom overflow valve (throttling one-way valve) Section 4 rotation system I. system structure 2. Rotary motor 3. Turn brake 4. Rotary oil road
5. Specification of overflow valve of rotary motor Vi. Troubleshooting of rotating system 7. Performance testing Spin and slide
9. Clearance of rotating bearings Section 5 walking system