Part of the Yanmar Repair Manuals.
This 529-page Yanmar ViO27-6 Service Manual covers your ViO27-6 mini excavator from engine rebuild to hydraulic pump teardown, with every spec pulled straight from the Yanmar factory. Inside: full hydraulic circuit schematics with complete fluid routing, wiring diagrams for the engine start/stop circuit and automatic deceleration system, an error code list, and a troubleshooting quick-reference table. You also get torque tables across every major fastener group, pressure adjustment specs for relief valves, swing brake, and cut-off valves, plus step-by-step procedures for cylinder head, fuel injection timing, swing bearing service, and travel motor removal. Torque the travel motor to the track frame at 46 to 54 N·m; swing bearing bolts to both the track frame and turning frame call for 116 to 138 N·m. Your machine is down and forum guesses won\'t fix it. Grab your tablet, walk to the excavator, and pull up any spec by keyword in seconds.
Other edition of this manual
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 10-21 | 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 |
| Technical Data | 22-49 | 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 |
| Service Standards | 50-81 | Machine Performance, Engine, Undercarriage (Rubber Track Specifications, Steel Track Specifications, Common Specifications of Steel & Rubber Crawlers), Controls |
| Engine | 82-217 | 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 | 218-241 | 5-1 Electric Equipment of Machine, 5-2 Circuit Description of Engine Start and Stop, 5-3 Automatic Deceleration System, 5-4 Error Code List |
| Hydraulic System | 242-417 | 6-1 Outline, 6-2 Circuit Operation, 6-3 Hydraulic Pump, 6-4 Control Valve, 6-5 Pilot Valve, 6-6 Swing Motor, 6-7 Travel Motor |
| Adjustment and Repair | 418-513 | 7-1 Engine and Electric Equipment, 7-2 Undercarriage, 7-3 Controls, 7-4 Swing Bearing, 7-5 Hydraulic Equipment, 7-6 Work Implements, 7-7 Cabin |
| Troubleshooting | 514-529 | 8-1 Non-Breakdowns, 8-2 Quick Reference Table for Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for Travel motor × Track frame | 46 to 54 N·m | p. 72 |
| Tightening torque for Swing bearing × Track frame | 116 to 138 N·m | p. 72 |
| Tightening torque for Swing bearing × Turning frame | 116 to 138 N·m | p. 72 |
| Suction filter filtration area | 1120 cm² | p. 28 |
| Suction filter filtration accuracy | 75 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 cm² | p. 31 |
| Travel motor displacement (Low/High) | 18.4 / 10.6 cm³/rev | p. 28 |
| Travel motor system pressure | 20,6 MPa | p. 28 |
| Hydraulic hose working pressure (example) | 17.2 to 20.6 MPa | p. 17 |
| Hydraulic hose nominal diameter (example) | 3 / 8" | p. 17 |
