1
CONTENTS
FOREWORD...................................................................................................................................................... 1
BEFORE SERVICING THIS MACHINE..........................................................................................................2
UK DECLARATION OF CONFORMITY........................................................................................................3
Body and engine identification marks.................................................................................................................5
1 Safety...............................................................................................................................................................6
1.1 Safety information.................................................................................................................................6
1.1.1 Recognize safety label................................................................................................................6
1.1.2 Understand signal words ............................................................................................................6
1.1.3 Compliance with safety regulations...........................................................................................7
1.2 Safety operation of the machine.........................................................................................................17
1.2.1. Before starting the engine....................................................................................................... 17
1.2.2 After starting the engine...........................................................................................................19
1.3 The position of the safety labels........................................................................................................29
2 Usage Features and Performance Parameters of Carter 1.2T Excavators.....................................................36
2.1 Usage and features............................................................................................................................. 36
2.2 Main performance parameters...........................................................................................................38
2.3 Tailless excavator Main performance parameters............................................. 错误！未定义书签。
3.1 Overview on Carter 1.2T excavators................................................................................................. 41
3.2 Work principle of excavators.............................................................................................................42
3.3 Basic structure of Carter 1.2T excavators mechanical system...........................................................43
3.3.1 Power system........................................................................................................................... 43
3.3.2 Drive system.............................................................................................................................43
3.3.3 Swing mechanism.................................................................................................................... 43
3.3.4 Traveling mechanism...............................................................................................................43
3.4 Hydraulic system structure of Carter 1.2T excavators........................................................................46
3.5 Hydraulic schematic diagram.............................................................................................................49
3.5.1 Main valve function diagram ................................................................................................. 49
3.5.2 Main valve function diagram .................................................................错误！未定义书签。
3.5.3 Main valve function diagram ................................................................................................. 49
3.6 Electrical system diagram.................................................................................................................. 51
4 Service Technologies of Carter 1.2T Excavators..........................................................................................52
4.1 Basic construction knowledge............................................................................................................52
4.2 Preparation for work.......................................................................................................................... 52
4.3 Operational essentials.........................................................................................................................54
4.4 Operational Precautions..................................................................................................................... 56
4.4.1 Safety Button operation （Mechanical control type）..........................................................56
4.4.2 Safety Button operation （Pilot oil control system model）................ 错误！未定义书签。
4.4.3 Prohibitions and precautions for hydraulic excavators............................................................ 59
5 Maintenance of Carter 1.2T Excavators........................................................................................................60
5.1 Safty precautions for servicing, disassembly and reassembly........................................................... 60
5.1.1 Safty measures before starting work........................................................................................60
5.1.2 Safty measures during work....................................................................................................60
5.1.3 Preparation for disassembly..................................................................................................... 61
5.2 Daily inspection and maintenance..................................................................................................... 62
5.3 Periods of overhaul, medium and minor repair..................................................................................62
5.4 Technical maintenance........................................................................................................................64
5.4.1、Grease..................................................................................................................................64
5.4.2 Slewing bearing - every 100h................................................................................................. 65
5.4.3 Engine oil............................................................................................................................... 66
5.4.4、Hydraulic system...................................................................................................................68
5.4.5 Fuel system..............................................................................................................................71
5.5 Telescopic chassis.............................................................................................................................. 75
5.6 Maintenance under the special cases.................................................................................................77
