Yanmar Mini Excavator ViO25-6 Service Manual MMB16ENMA00101

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Yanmar Mini Excavator ViO25-6 Service Manual MMB16ENMA00101
Size: 93.39 MB
Format: PDF
Language: English
Brand: Yanmar
Type of Machine: Mini Excavator
Type of Manual: Service Manual, Electric and Hydraulic Diagrams
Model: Yanmar ViO25-6 Mini Excavator
Part Number: MMB16ENMA00101
Number of Pages: 565 Pages

Contents:
1. General Cautions for Maintenance Work

1-1 Correct Work​

1-2 Safety Precautions​

1-3 Preparations​

1-4 Cautions for Disassembly and Reassembly​

1-5 Cautions for Removal and Installation of Hydraulic Equipment​

1-6 Cautions for Removal and Installation of Hydraulic Piping​

1-7 Cautions for Handling Seals​

1-8 Correct Installation of Hydraulic Hose​

1-9 Specifications of Hydraulic Hose​

1-10 Air Release of Hydraulic Equipment​

2. Technical Data

2-1 Specifications​

2-2 Outline Drawing and Working Area​

2-3 Weight List of Main Parts​

2-4 Lifting Capacity List​

2-5 Specifications for Attachment​

2-6 Periodic Inspection and Servicing​

2-7 Fuel, Lube Oil and Grease Recommended​

2-8 Hydraulic Circuit Schematic​

2-9 Wiring Diagram​

3. Service Standards

3-1 Machine Performance​

3-2 Engine​

3-3 Undercarriage​

3-3-1 Rubber Track Specifications​

3-3-2 Steel Track Specifications​

3-3-3 Common Specifications of Steel & Rubber Crawlers​

3-4 Controls​

3-5 Hydraulic Equipment​

3-5-1 Hydraulic Cylinders​

3-6 Implement​

3-6-1 Front Attachments​

3-6-2 Blade Moving Device​

3-7 List of Tightening Torque​

3-7-1 Machine​

3-7-2 Engine​

3-7-3 Tightening Torque for General Bolts and Nuts​

3-7-4 Hydraulic Fitting​

3-8 Pressure Adjustment​

3-8-1 Relief Valves​

3-8-2 Swing Brake Valve​

3-8-3 Cut-Off Valve​

4. Engine

4-1 Safety​

4-1-1 Safety Statements​

4-1-2 Safety Precautions​

4-2 Engine​

4-2-1 Before You Begin Servicing​

4-2-2 Special Service Tools​

4-2-3 Measuring Instruments​

4-2-4 Cylinder Head​

4-2-5 Measuring and Adjusting Valve Clearance​

4-2-6 Crankshaft and Camshaft Components​

4-3 Fuel System​

4-3-1 Before You Begin Servicing​

4-3-2 Introduction​

4-3-3 Special Service Tools​

4-3-4 Measuring Instruments​

4-3-5 Fuel System Diagram​

4-3-6 Fuel System Components​

4-3-7 Fuel Injection Lines​

4-3-8 Fuel Injection Pump​

4-3-9 Checking and Adjusting Fuel Injection Timing​

4-3-10 Fuel Injectors​

4-4 Cooling System​

4-4-1 Before You Begin Servicing​

4-4-2 Introduction​

4-4-3 Cooling System Diagram​

4-4-4 Engine Coolant Pump Components​

4-4-5 Engine Coolant System Check​

4-4-6 Engine Coolant Pump​

4-5 Lubrication System​

4-5-1 Before You Begin Servicing​

4-5-2 Introduction​

4-5-3 Lubrication System Diagram​

4-5-4 Checking Engine Oil Pressure​

4-5-5 Trochoid Oil Pump​

4-6 Starter Motor​

4-6-1 Before You Begin Servicing​

4-6-2 Introduction​

4-6-3 Starter Motor Specifications​

4-6-4 Starter Motor Troubleshooting​

4-6-5 Starter Motor Components​

4-6-6 Starter Motor​

4-7 Alternator​

4-7-1 Before You Begin Servicing​

4-7-2 Introduction​

4-7-3 Alternator Specifications​

4-7-4 Alternator Troubleshooting​

4-7-5 Alternator Components​

4-7-6 Alternator Wiring Diagram​

4-7-7 Alternator Standard Output​

4-7-8 Alternator​

4-8 Electric Wiring​

4-8-1 Electric Wiring Precautions​

4-9 Troubleshooting​

4-9-1 Special Service Tools​

4-9-2 Troubleshooting By Measuring Compression Pressure​

4-9-3 Quick Reference Table For Troubleshooting​

5. Electric System

5-1 Electric Equipment of Machine​

5-1-1 Parts Layout of Electrical Equipment​

5-1-2 LCD Monitor and Alarm Systems​

5-2 Circuit Description of Engine Start and Stop​

5-2-1 Engine Start and Stop​

5-2-2 Battery charge​

5-3 Automatic Deceleration System​

5-3-1 Main Components and Wiring Diagram​

5-3-2 Function and Control​

5-3-3 Error Indication of Auto Deceleration Alarm Lamp​

5-4 Error Code List​

6. Hydraulic System

6-1 Outline​

6-1-1 Control Valve Operation​

6-1-2 Additional Operation of Control Valve​

6-2 Circuit Operation​

6-2-1 Boom​

6-2-2 Arm​

6-2-3 Bucket​

6-2-4 Swing​

6-2-5 Boom Swing​

6-2-6 Blade​

6-2-7 Travel​

6-2-8 Non-Deviation Travel (with Boom, Arm, Bucket or Boom Swing Operation)​

6-2-9 Simultaneous Operation of Boom Up and Arm Retract​

6-2-10 Simultaneous Operation of Boom Up and Bucket​

6-2-11 Simultaneous Operation of Boom Up and Swing​

6-2-12 Simultaneous Operation of Arm and Bucket​

6-2-13 Hydraulic P.T.O.​

6-2-14 Travel Alarm (Optional)​

6-2-15 Auto Deceleration (Optional)​

6-3 Hydraulic Pump​

6-4 Control Valve​

6-5 Pilot Valve​

6-6 Swing Motor​

6-7 Travel Motor​

6-8 Proportional solenoid valve​

7. Adjustment and Repair

7-1 Engine and Electric Equipment​

7-1-1 Removal and Reinstallation of Engine​

7-1-2 Removal and Reinstallation of Starter Motor​

7-1-3 Removal and Reinstallation of Radiator and Oil Cooler​

7-1-4 Removal and Reinstallation of Fan Belt​

7-2 Undercarriage​

7-2-1 Outline​

7-2-2 Main Parts​

7-2-3 Points of Reassembly (Rubber Track)​

7-2-4 Points of Reassembly (Steel Track)​

7-2-5 Removal and Reinstallation of Track​

7-2-6 Removal and Reinstallation of Travel Motor​

7-2-7 Disassembly and Reassembly of Idler​

7-2-8 Disassembly and Reassembly of Track Roller​

7-2-9 Disassembly and Reassembly of Carrier Roller​

7-2-10 Installation of Floating Seal​

7-2-11 Drawings of Jig​

7-3 Controls​

7-3-1 Mechanical Control Linkage​

7-3-2 Adjustment of Travel Levers​

7-3-3 Adjustment of Blade Lever​

7-3-4 Adjustment of Lock Lever​

7-4 Swing Bearing​

7-5 Hydraulic Equipment​

7-5-1 Removal and Reinstallation of Hydraulic Pump​

7-5-2 Removal and Reinstallation of Control Valve​

7-5-3 Removal and Reinstallation of Pilot Valves (L and R)​

7-5-4 Removal and Reinstallation of Swing Motor​

7-5-5 Removal and Reinstallation of Swivel Joint​

7-5-6 Disassembly and Reassembly of Swivel Joint​

7-5-7 Disassembly and Reassembly of Hydraulic Cylinder​

7-5-8 Removal and Reinstallation of Hydraulic Oil Tank​

7-5-9 Piping Layout​

7-6 Work Implements​

7-6-1 Removal and Reinstallation of Work Implements​

7-7 Cabin​

7-7-1 Removal and Reinstallation of Cabin​

8. Troubleshooting

8-1 Non-Breakdowns​

8-1-1 Natural Release of Bucket​

8-1-2 Discontinuous Arm Movement​

8-1-3 Drifting of Upperstructure on Quick Travel Operation​

8-1-4 Thermal Shock of Travel Motor​

8-1-5 Elongation of Boom Swing Cylinder on 65 degrees Swing​

8-1-6 Telescopic Motion of Boom Swing Cylinder with Lock Lever Set to Lock Position​

8-1-7 Time Lag on Travel Speed Switching​

8-1-8 Fluctuation in Oil Level of Hydraulic Oil Tank Due to Temperature Change​

8-2 Quick Reference Table for Troubleshooting​