Yanmar ViO27-6 Mini Excavator Service Manual

Description

• Model List:
  • ViO27-6 Mini Excavator

• 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
• 6.2. 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 Upand Arm Retract
• 6.2.10. Simultaneous Operation of Boom Upand Bucket
• 6.2.11. Simultaneous Operation of Boom Upand Swing
• 6.2.12. Simultaneous Operation of Arm andBucket
• 6.2.13. Hydraulic P.T.O. 1
• 6.2.14. Hydraulic P.T.O. 2
• 6.2.15. Travel Alarm (Optional)
• 6.2.16. Auto Deceleration
• 6.3. Hydraulic Pump
• 6.4. Control Valve
• 6.5. Pilot Valve
• 6.6. Swing Motor
• 6.7. Travel Motor
• 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 Boom Swing Pedal
• 7.3.4. Adjustment of Blade Lever
• 7.3.5. 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 Fuel Tank
• 7.5.9. Removal and Reinstallation of Hydraulic Oil Tank
• 7.5.10. 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. Time Lag on Travel Speed Switching
• 8.1.7. Fluctuation in Oil Level of Hydraulic Oil Tank Due to Temperature Change
• 8.2. Quick Reference Table for Troubleshooting