1.3.3 Brake air gap adjustment ...................................................................................................... 86
1.3.4 Maintenance .......................................................................................................................... 87
1.3.5 Common fault and troubleshooting ....................................................................................... 88
2 Hydraulic system ................................................................................................................... 89
2.1 Hydraulic system working principle ....................................................................................... 90
2.2 Hydraulic unit ......................................................................................................................... 91
2.3 Hydraulic unit dismantle......................................................................................................... 95
2.4 Hydraulic system fault diagnosis and correction ................................................................... 96
3 Electric system ...................................................................................................................... 97
3.1 Principles of electrical system ............................................................................................... 97
3.2 AC motor controller .............................................................................................................. 101
3.2.1 Maintenance ........................................................................................................................ 101
3.2.2 Diagnosis and troubleshooting ............................................................................................ 102
3.2.3 LED Status Indicator ........................................................................................................... 106
3.2.4 Fault code table ................................................................................................................... 107
Attachment：Table for bolt’s tightening torque ............................................................................. 118
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