Part of the Yanmar Repair Manuals.
All 683 pages of this Yanmar ViO57-6A Service Manual are built around a single machine: the ViO57-6A compact excavator, from hydraulic pump teardown to cabin glass replacement and A/C compressor service. Inside, you get the full hydraulic circuit schematic with complete fluid routing, a multi-harness wiring diagram covering the seat mount and electric systems, and a troubleshooting quick-reference table backed by a complete error code list. Open to the pressure adjustment section and you'll walk through step-by-step procedures for relief valves, swing brake valves, and cut-off valves, with failure diagnosis running from compression pressure measurement straight through electronic control system faults. Torque the G(PF) 1/2 hydraulic hose fitting to 61-65 N·m and swap the LO filter every 500 hours or each annual service. No more guessing what the factory says. Bookmarked and keyword-searchable, jump straight to any section and have the right number before you pick up a wrench.
What's Inside This Yanmar ViO57-6A Manual
| System | Pages | Key Topics |
|---|---|---|
| 2-5 Specifications for Attachment | 15 | Dimensions, Oil Pressure Specifications |
| 2-6 Periodic Inspection and Servicing | 15 | Parts & Operations, Scheduled Maintenance Points of the Machine |
| 2-7 Fuel, Lube Oil and Grease Recommended | 15 | Components, Fluid, Quantity Prescribed |
| 2-8 Hydraulic Circuit Schematic | 15 | |
| 2-9 Wiring Diagram | 16-39 | Reference Numbers, Seat Mount Harness, Seat Mount, Electric System |
| 3-8 Pressure Adjustment | 40-72 | Relief Valves, Swing Brake Valve, Cut-Off Valve, Conditions, Measuring Procedure, Adjustment Procedure |
| 4-6 Turbocharger | 73 | Specifications, Troubleshooting, Turbocharger Components, Turbocharger Component Functions, Washing Procedure, Periodic Inspection |
| 4-7 Starter Motor | 73 | Starter Motor Specifications, Troubleshooting, Starter Motor Components, Removal of Starter Motor, Disassembly of Starter Motor, Reassembly of Starter Motor |
| 4-8 Alternator | 73 | Alternator Specifications, Troubleshooting, Alternator Components, Removal of Alternator, Disassembly of Alternator, Reassembly of Alternator |
| 4-9 Electronic Control System | 73 | Engines Available with the Electronic Control System, Before You Begin Servicing, Introduction, Electronic Control System, Engine Speed Control Schemes, Engine Failure Detection |
| 4-10 Electric Wiring | 73 | Electric Wiring Precautions |
| 4-11 Failure Diagnosis. | 74-234 | Special Service Tools, Troubleshooting by Measuring Compression Pressure, Compression Pressure Measurement Method, Standard Compression Pressure, Measured Value and Troubleshooting |
| 4-12 Troubleshooting | 235-264 | Quick Reference Table for Troubleshooting |
| 5-4 Error Code List | 265-272 | |
| 6-3 Hydraulic Pump | 273 | Outline, Theory of Operation, Exploded View and Parts Comprised, Disassembly and Reassembly, Service Standards, Troubleshooting |
| 6-4 Control Valve | 273 | Outline, Operation, Disassembly, Reassembly, Service Standard, Troubleshooting |
| 6-8 Proportional Solenoid Valve for P.T.O | 274-508 | Main Components, Specifications, Theory of Operation, Disassembly and Reassembly, Troubleshooting |
| 7-7 Cabin | 509 | Removal and Reinstallation of Cabin, Disassembly and Reassembly of Cabin, Glass Replacement Procedure, Cabin Door Installation and Adjustment, Lock Lever Adjustment |
| 7-8 Air Conditioner | 510-683 | Removal and Reinstallation, A/C (Heater) Unit, A/C Condenser, Compressor, Lube Oil Quantity Adjustment, Components and Specifications |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for hose with parallel pipe thread G(PF) 1/2 | 61 to 65 N·m | p. 67 |
| LO filter filtration area | 1160 cm² | p. 23 |
| LO filter replacement interval | Every 500h / Every year | p. 31 |
| Engine oil type | SAE 10W CDSAE 10W CJ-4 | p. 33 |
| Engine oil quantity | 7,4 L | p. 33 |
| Cooling fluid type | YANMAR POWER COOLANT B–36 | p. 33 |
| Cooling fluid quantity (radiator) | 6,7 L | p. 33 |
| Fuel/water separator type | Float type | p. 23 |
| GO filter replacement interval | Every 500h / Every year | p. 31 |
| Air cleaner filtration area | 2,37 cm² | p. 24 |
| Maximum air intake restriction | 6.23 kPa or less | p. 91 |
| Rubber crawler wear limit (A) | 5 mm | p. 56 |
