ǰ�� �Ŀ1�b�d�C��B�c���1 �΄�1.1�b�d�C��B1 �΄�1.2�b�d�C���7 �Ŀ2�b�d�C���B�c�S�o12 �΄�2.1���ڱ��B�c�S�oӋ��������12 �΄�2.2�����b�ñ��B15 �΄�2.3�l�әC���B�c�S�o17 �΄�2.4Һ��ϵ�y���B�c�S�o28 �΄�2.5늚�ϵ�y���B�c�S�o33 �΄�2.6���{ϵ�y���B�c�S�o36 �Ŀ3�b�d�CҺ��ϵ�y�����c�z�y39 �΄�3.1Һ��ϵ�y����ԭ������40 �΄�3.2Һ��ϵ�y���ܙz�y56 �Ŀ4�b�d�C늚�ϵ�y�����c�S�o60 �΄�4.1���·����ԭ������61 �΄�4.2�x��ϵ�y����ԭ������68 �΄�4.3�_�P�c���M������ԭ������70 �΄�4.4�Ԅӏ�λϵ�y����ԭ������74 �΄�4.5�o���Ƅ��c�����Д�ϵ�y����ԭ������75 �΄�4.6׃�ٲٿvϵ�y����ԭ������76 �΄�4.7��܇�������Q82 �Ŀ5�b�d�C���{ϵ�y�S�o84 �΄�5.1���s�C�IJ�ж85 �΄�5.2��Һ�ޙz�y87 �΄�5.3�������{�������89 �΄�5.4�������z�y90 �΄�5.5�������z�y91 �Ŀ6�b�d�C����ϵ�y����93 �΄�6.1׃��������ԭ������93 �΄�6.2׃��������ԭ������94 �΄�6.3�Ә���ԭ������96 �Ŀ7�b�d�C�����\���c�ų�100 �΄�7.1Һ��ϵ�y�����\���c�ų�100 �΄�7.2늚�ϵ�y�����\���c�ų�107 �΄�7.3�b�d�C���{ϵ�y�����\���c�ų�113 Project 1Introduction,delivery and inspection of the loader118 Task 1.1Introduction of the loader118 Task 1.2Delivery and inspection of the loader126 Project 2Maintenance of the loader131 Task 2.1Preparation of regular maintenance and service plans131 Task 2.2Maintenance of working devices135 Task 2.3Maintenance of the engine138 Task 2.4Maintenance of hydraulic system152 Task 2.5Maintenance of electrical system158 Task 2.6Maintenance of air conditioning system162 Project 3Analysis and measurement of loader hydraulic system165 Task 3.1Working principle analysis of hydraulic system166 Task 3.2Measurement of hydraulic system performance187 Project 4Analysis and maintenance of loader electrical system192 Task 4.1Analysis of working principle of main circuit193 Task 4.2Analysis of working principle of instrument system202 Task 4.3Analysis of working principle of switch and lamp assembly204 Task 4.4Analysis of working principle of automatic reset system209 Task 4.5Analysis of working principle of emergency brake and power cut-off system210 Task 4.6Analysis of the working principle of transmission control system212 Task 4.7Replacement of reversing alarm217 Project 5Maintenance of loader air conditioning system220 Task 5.1Compressor disassembly222 Task 5.2Receiver testing 224 Task 5.3Operation of the air conditioning control panel227 Task 5.4Detection of condenser228 Task 5.5Detection of sensor229 Project 6Analysis of loader drive system231 Task 6.1Analysis of the operation principle of the torque converter231 Task 6.2Analysis of the operation principle of the gearbox233 Task 6.3Analysis of the operation principle of drive axle235 Project 7Diagnosis and troubleshooting of loader240 Task 7.1Diagnosis and troubleshooting of hydraulic system240 Task 7.2Diagnosis and troubleshooting of electrical system248 Task 7.3Diagnosis and troubleshooting of loader air conditioning system255 �����īI258