3
Maintenance principles of the excavator………………………………………………..66
Fuel system………………………………………………………………………………66
Air filter………………………………………………………………………………….67
Undercarriage……………………………………………………………………………68
Checking mounting screws for tightness………………………………………………...69
Hydraulic system………………………………………………………………………...69
The electrical system…………………………………………………………………….70
The swing and travel brake……………………………………………………………...71
Adjusting the clearance of the bucket…………………………………………………...72
Replacing wear and tear items…………………………………………………………..72
Maintenance schedule…………………………………………………………………...72
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.TROUBLE ANALYSIS GUIDELINE
Engine trouble…………………………………………………………………………...76
Trouble of electrical system……………………………………………………………..76
Others……………………………………………………………………………….…...77
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