Yanmar Mini Excavator ViO25-6L Service Manual MMB16LENMA00102

Description

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