Part of the Yanmar Repair Manuals.
Every system on the Yanmar ViO27-6 compact excavator gets its own chapter in this 565-page factory service manual, from engine internals and fuel injection through hydraulic circuit operation and undercarriage rebuild procedures. Inside, you get full hydraulic schematics for every attachment circuit: boom, arm, bucket, swing, blade, and travel, including non-deviation travel during combined operations. Wiring diagrams cover the engine start/stop system, battery charge circuit, auto deceleration controls, and the LCD monitor alarm system. Swing bearing M12 bolts torque to 117.7 to 127.5 N·m (Loctite 262 required), and travel motor sprocket M10 mounting bolts call for 44.1 to 58.9 N·m. Your machine is down. Open the PDF on any device, use the bookmarks to jump straight to hydraulics or the error code list, and get back to digging.
Other edition of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 12-19 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment, Cautions for Removal and Installation of Hydraulic Piping, Cautions for Handling Seals, Correct Installation of Hydraulic Hose, Specifications of Hydraulic Hose, Air Release of Hydraulic Equipment |
| Technical Data | 24-42 | Specifications, Outline Drawing and Working Area, Weight List of Main Parts, Lifting Capacity List, Specifications for Attachment, Periodic Inspection and Servicing, Fuel, Lube Oil and Grease Recommended, Hydraulic Circuit Schematic, Wiring Diagram |
| Service Standards | 51-79 | Machine Performance, Engine, Undercarriage (Rubber Track Specifications, Steel Track Specifications, Common Specifications of Steel & Rubber Crawlers), Controls, Hydraulic Equipment, Implement, List of Tightening Torque, Pressure Adjustment |
| Engine | 83-226 | 4-1 Safety, 4-2 Engine, 4-3 Fuel System, 4-4 Cooling System, 4-5 Lubrication System, 4-6 Starter Motor, 4-7 Alternator, 4-8 Electric Wiring |
| Electric System | 227-254 | Electric Equipment of Machine (Parts Layout of Electrical Equipment, LCD Monitor and Alarm Systems), Circuit Description of Engine Start and Stop (Battery Charge) |
| Hydraulic System | 255-454 | Outline (Control Valve Operation, Additional Operation of Control Valve) |
| Adjustment and Repair | 455-552 | Engine and Electric Equipment (Removal Reinstallation: Starter Motor, Radiator and Oil Cooler, Fan Belt) |
| Troubleshooting | 553-565 | Non-Breakdowns (Natural Release of Bucket, Discontinuous Arm Movement, Drifting of Upperstructure on Quick Travel Operation, Thermal Shock of Travel Motor, Elongation of Boom Swing Cylinder on 65 Degrees Swing, Telescopic Motion of Boom Swing Cylinder with Lock Lever Set to Lock Position, Time Lag on Travel Speed Switching, Fluctuation in Oil Level of Hydraulic Oil Tank Due to Temperature Change) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Travel motor and sprocket mounting bolt (M10) tightening torque | 44.1 to 58.9 N·m | p. 70 |
| Swing bearing × Track frame tightening torque | 117.7 to 127.5 N·m | p. 69 |
| Swing bearing × Turning frame tightening torque | 117.7 to 127.5 N·m | p. 69 |
| Suction filter filtration accuracy | 150 u | p. 28 |
| Return filter filtration accuracy | 10 u | p. 28 |
| LO filter filtration area | 800 cm2 | p. 31 |
| LO filter valve opening pressure | 0.08 to 0.12 MPa | p. 31 |
| Fuel filter filtration area | 432 sq.cm | p. 31 |
| Hydraulic oil tank capacity | 25 L | p. 28 |
| Hydraulic oil type | ISO VG46 | p. 40 |
| Radiator cap pressure | 88.3 kPa | p. 31 |
| Cooling fluid type | YANMAR POWER COOLANT B–36 | p. 40 |
