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 |
Yanmar ViO57-6A Common Problems This Manual Covers
Yanmar ViO57-6A hydraulic functions slow, weak, or erratic and machine overheats under heavy load p. 40
Check the system relief set pressure on page 19. Verify the main relief valves P1 and P2 are set to exactly 24.5 MPa. If pressure falls below specs, inspect the hydraulic circuit schematic on page 15. Drain and replace the hydraulic oil return filter if it exceeds the 10 μ filtration accuracy limit.
Manual Section: 3-8 Pressure AdjustmentEngine hard starting, rough running, or stalling with excessive exhaust smoke and abnormal vibration p. 74
Measure the intake valve clearance on a cold engine. Adjust the clearance to 0.15 to 0.25 mm as outlined on page 23. Inspect the cylinder head bolts and torque them to 85.3 to 91.1 N•m using the specifications on page 64. Replace the air filter if intake restriction exceeds 6.23 kPa.
Manual Section: 4-11 Failure Diagnosis.Severe track wear, tracking drift, or poor undercarriage performance during travel operations p. 235
Inspect the rubber crawler wear limit on page 56 and replace if the tread falls below 5 mm. Check the sprocket mounting bolts on page 60 and torque them to 127 to 149 N·m. Verify the track roller and shaft wear limit on page 53 stays within Ø40,4 mm.
Manual Section: 4-12 TroubleshootingMachine overheats, displays cooling performance faults, and blows coolant from the radiator overflow p. 235
Verify the thermostat opening temperature reaches 71 ºC as specified on page 24. Drain the cooling system and refill with exactly 6,7 L of Yanmar Power Coolant B–36 following the fluid capacities chart on page 33. Inspect the radiator cap and confirm it holds 0,09 MPa of pressure.
Manual Section: Engine General TroubleshootingFrequently Asked Questions
How to reset Yanmar ViO57-6A error codes?
To reset Yanmar ViO57-6A error codes, turn the starter switch to the “OFF” position and then to the “ON” position. After performing this action, check if the error code is displayed again to confirm the reset.
Torque specs for Yanmar ViO57-6A swing bearing bolts?
The tightening torque for Yanmar ViO57-6A swing bearing bolts is 291 to 339 N·m for both M16 × 90 (10.9T) bolts connecting the swing bearing to the track frame and M16 × 80 (10.9T) bolts connecting the swing bearing to the turning frame. Loctite 262 or K-965 equivalent adhesive should be applied.
What are the common error codes on Yanmar ViO57-6A and how to fix them?
Common error codes include Accelerator sensor malfunction (00 000091.00) where sensor voltage is 4.6 V or more, or 0.2 V or less, which can be fixed by checking connectors, harnesses, and the engine control dial, then turning the starter switch OFF and ON. Abnormal engine oil pressure (00 000100.01) occurs when the switch is on after the engine has started, and requires inspecting the engine oil system, checking harnesses and the oil pressure switch, then turning the starter switch OFF and ON.
How to reset the preheat timer on Yanmar ViO57-6A?
The Yanmar ViO57-6A does not have a manual preheat timer reset. The on-glow control system automatically energizes the glow relay for a specific duration when the starter switch is set to the ON position, with the preheat time configured based on the coolant temperature.
How will I receive this Service Manual?
You get a 683-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Can I print specific sections of this Service Manual?
No restrictions at all. Print individual pages, full chapters, or the entire manual. The PDF is completely unlocked.
Does this Service Manual have electrical diagrams?
Yes, this Yanmar ViO57-6A Service Manual includes complete electrical wiring diagrams, wire routing, and connector pinouts.
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