SECTION 1 - HOW TO USE
Sections index ............................................................................................................................................... 1-1
Introduction ................................................................................................................................................... 1-4
Features of the manual ................................................................................................................................. 1-5
SECTION 2 - SAFETY RULES
Safety rules ....................................................................................................................................................S1
Safety signs..................................................................................................................................................S38
SECTION 3 - PRELIMINARY
General precautions for repairs ..................................................................................................................... 3-1
Escaping procedure in case of emergency ................................................................................................... 3-6
International unit conversion system ............................................................................................................. 3-7
SECTION 4 - SPECIFICATION
Foreword ....................................................................................................................................................... 4-1
Identification data .......................................................................................................................................... 4-2
Noise levels (2000/14/EC) ............................................................................................................................ 4-3
Summary plate for maintenance operations ................................................................................................. 4-4
Basic components of the mini excavator....................................................................................................... 4-5
Technical specifications ................................................................................................................................ 4-7
Digging performances (canopy) .................................................................................................................... 4-8
Digging performances (cab) .......................................................................................................................... 4-9
Transport dimensions (canopy)................................................................................................................... 4-10
Transport dimensions (cab) ........................................................................................................................ 4-11
Lifting capacities (cab) ................................................................................................................................ 4-12
Lifting capacities (canopy) ........................................................................................................................... 4-13
Machine and components weight (dry) ....................................................................................................... 4-14
Buckets application ..................................................................................................................................... 4-15
Filling chart .................................................................................................................................................. 4-16
SECTION 5 - TOOLS
Tools of cylinders .......................................................................................................................................... 5-1
Tool of hydraulic pump .................................................................................................................................. 5-4
Tool of pilot valve track ................................................................................................................................. 5-4
Tool of roller track ......................................................................................................................................... 5-4
Tool of idler adjuster ...................................................................................................................................... 5-5
Tools of engine.............................................................................................................................................. 5-5
Tools of travel motor ..................................................................................................................................... 5-8
SECTION 6 - STANDARD MAINTENANCE TIME TABLE
Preface .......................................................................................................................................................... 6-1
Standard working time table for the maintenance ......................................................................................... 6-2
SECTION 7 - MAINTENANCE STANDARDS AND TEST PROCEDURES
How to use maintenance standards and precuations ................................................................................... 7-1
Performance inspection standard table......................................................................................................... 7-2
Measuring engine speed ............................................................................................................................... 7-4
Measuring hydraulic oil pressure .................................................................................................................. 7-5
Measuring travel performances..................................................................................................................... 7-8
Measuring slew performances .................................................................................................................... 7-10
Measuring attachment operating performances.......................................................................................... 7-12
Measuring slew bearing performances ....................................................................................................... 7-14
Measuring crawler tension .......................................................................................................................... 7-15
SECTION 8 - HYDRAULIC SYSTEM
Function and features of hydraulic circuit...................................................................................................... 8-1
Hydraulic circuits and components ............................................................................................................... 8-2
Hydraulic circuit operation ............................................................................................................................. 8-6
SECTION 9 - ELECTRICAL SYSTEM
How to read circuit diagram .......................................................................................................................... 9-1
SECTION 10 - ATTACHMENT
Attachment assy and name......................................................................................................................... 10-1
Bucket ......................................................................................................................................................... 10-2
Arm.............................................................................................................................................................. 10-5
Boom ......................................................................................................................................................... 10-10
Swing ........................................................................................................................................................ 10-15
Dozer......................................................................................................................................................... 10-22
Hydraulic cylinders .................................................................................................................................... 10-26
SECTION 11 - UPPER STRUCTURE
Canopy ........................................................................................................................................................ 11-1
Cab.............................................................................................................................................................. 11-4
Guard .......................................................................................................................................................... 11-6
Floor plate ................................................................................................................................................. 11-10
Battery ....................................................................................................................................................... 11-13
Counterweight ........................................................................................................................................... 11-14
Fuel tank ................................................................................................................................................... 11-17
Hydraulic oil tank ....................................................................................................................................... 11-20
Air cleaner ................................................................................................................................................. 11-25
Muffler ....................................................................................................................................................... 11-27
Hydraulic pump ......................................................................................................................................... 11-28
Radiator ..................................................................................................................................................... 11-43
Engine ....................................................................................................................................................... 11-47
Control valve ............................................................................................................................................. 11-49
Solenoid valve ........................................................................................................................................... 11-84
Pilot valve .................................................................................................................................................. 11-86
Pilot valve travel ........................................................................................................................................ 11-96
Slew motor .............................................................................................................................................. 11-105
Joint swivel .............................................................................................................................................. 11-139
Selector valve .......................................................................................................................................... 11-154
Upper frame ............................................................................................................................................ 11-159
SECTION 12 - TRAVEL SYSTEM
Low structure ............................................................................................................................................... 12-1
Crawler ........................................................................................................................................................ 12-3
Slide plate ................................................................................................................................................. 12-12
Roller tracks .............................................................................................................................................. 12-14
Idler adjuster ............................................................................................................................................. 12-19
Sprocket .................................................................................................................................................... 12-28
Travel motor .............................................................................................................................................. 12-29
Slew bearing ............................................................................................................................................. 12-71
Lower frame .............................................................................................................................................. 12-76
SECTION 13 - TROUBLESHOOTING HYDRAULIC SYSTEM
General precautions .................................................................................................................................... 13-1
Trouble diagnosis: Hydraulic ....................................................................................................................... 13-2
Troubleshooting .......................................................................................................................................... 13-3
SECTION 14 - TROUBLESHOOTING ELECTRICAL SYSTEM
Trouble diagnosis: Electrical ....................................................................................................................... 14-1
Troubleshooting .......................................................................................................................................... 14-2
SECTION 15 - TROUBLESHOOTING ENGINE
Trouble diagnosis: Engine........................................................................................................................... 15-1
Troubleshooting .......................................................................................................................................... 15-2
SECTION 16 - ENGINE
Specifications and Performance ............................................................................................................... 16-1
Cross Sectional Views .............................................................................................................................. 16-15
Cooling water, lubricating oil and fuel oil .................................................................................................. 16-17
Troubleshooting ........................................................................................................................................ 16-21
Measuring instruments .............................................................................................................................. 16-25
Measurement, inspection and adjustment ................................................................................................ 16-29
Adjustment the valve head clearance ....................................................................................................... 16-31
Checking the v-belt tension ....................................................................................................................... 16-32
Measuring and checking the injection pressure and spray patterns of the fuel injection valve ................. 16-32
Checking and adjustament the fuel injection timing .................................................................................. 16-36
Adjustament the no-load maximum (or minimum) revolutions .................................................................. 16-38
Checking the cooling water system and radiator for water leakage .......................................................... 16-38
Checking the battery ................................................................................................................................. 16-39
Checking the sensors................................................................................................................................ 16-41
Checking the oil cooler .............................................................................................................................. 16-42
Checking the piston cooling nozzle ........................................................................................................... 16-43
Measuring Procedure, Service Data and Corrective Action ...................................................................... 16-45
Disassembly and reassembly ................................................................................................................... 16-73
Service data .............................................................................................................................................. 16-83
Tightening torque ...................................................................................................................................... 16-89
Fuel injection pump for indirect injection system ....................................................................................... 16-91
Fuel Injection Pump for Direct Injection System ....................................................................................... 16-97
Governor ................................................................................................................................................. 16-111
Turbocharger........................................................................................................................................... 16-123
Service information for CARB ULG regulation ........................................................................................ 16-129

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