1. 1 development history and trend of excavators

1.2 Usage and classification of excavators

1.3 excavator model and main parameters

1.4 overall structure and characteristics of excavator

Chapter II Working Principle and Device of Excavator

2. 1 Hydraulic transmission principle of excavator

2.2 Type of excavator working device

2.3 Composition and function of backhoe device

2.4 Working principle of backhoe

2.5 Replacement and installation of bucket

2.6 hydraulic system of crusher

2.7 Crawler walking device

2.8 tire walking device

2.9 slewing device

2. 10 turntable

Chapter III Control System of Hydraulic Excavator

3. 1 Foundation of hydraulic system

3.2 Basic composition of hydraulic system of excavator

3.3 Basic circuit of hydraulic system

3.4 Main hydraulic systems and functions of hydraulic excavators

3.5 Operation control system

3.6 Steering control system of tire hydraulic excavator

Chapter IV Control and Operation of Excavators

4. 1 control and operation parts of excavator

4.2 Engine Control and Operation

4.3 Control and operation of excavator walking

4.4 Steering control and operation of excavator

4.5 Control and operation of excavator working device

4.6 Use and operation of excavator at low temperature

Chapter V Use and Maintenance of Excavators

5. 1 Correct use of excavators

5.2 Maintenance of excavators

Chapter VI Safe Operation of Excavators

6. 1 Safety operation requirements of excavators

6.2 Responsibilities of relevant personnel and maintenance procedures of excavators

6.3 Fault Diagnosis and Maintenance of Excavators

refer to