All 803 pages of this Yanmar ViO82 Service Manual are built for one purpose: tearing down and rebuilding your Hydraulic Excavator to factory standard, from engine ECU to swing motor. If you landed here searching for a Yanmar vio82 service manual pdf, this is it. Inside, you get full hydraulic schematics covering pump, control valve, pilot valve, swing motor, and travel motor circuits, plus wiring diagrams for the cabin harness, engine harness, and both ECU controllers. A complete error code section, torque tables across every fastener class, and step-by-step repair procedures for undercarriage, hydraulic equipment, and cabin fill the rest. Check your return filter rating: 10 μ. Torque M8 × 1.25 fasteners to 22.6–28.4 N·m. No more guessing specs off a forum post. Bookmarked and searchable by keyword: pull it up on your tablet in the cab and start wrenching.
What's Inside This Yanmar ViO82 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 12-60 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Service Standards | 61-90 | 3-1 Machine Performance, 3-2 Engine, 3-3 Undercarriage, 3-4 Controls, 3-5 Hydraulic Equipment, 3-6 Implement, 3-7 List of Tightening Torque, 3-8 Pressure Adjustment |
| Engine | 91-247 | 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 Electronic Control System |
| Electric System | 248-314 | 5-1 Electric Equipment of Machine, 5-2 Circuit Description of Engine Start and Stop, 5-3 Engine ECU (Engine Controller), 5-4 Pump ECU (Pump Controller), 5-5 Error Code |
| Hydraulic System | 315-594 | 6-1 Outline, 6-2 Hydraulic Pump, 6-3 Control Valve, 6-4 Pilot Valve, 6-5 Swing Motor, 6-6 Travel Motor, 6-7 Pump Control Proportional Solenoid Valve, 6-8 Cutoff Valve |
| Adjustment and Repair | 595-784 | 7-1 Engine and Electric Equipment, 7-2 Undercarriage, 7-3 Controls, 7-4 Swing Bearing, 7-5 Hydraulic Equipment, 7-6 Implement, 7-7 Cabin, 7-8 Air Conditioner |
| Troubleshooting | 785-796 | 8-1 Non-Breakdowns, 8-2 Quick Reference Table for Troubleshooting |
| Colophon | 797-798 | - |
| Appendix | 799-803 | Cabin Harness, Controller (Pump) Detailed Drawing, Controller (Engine) Detailed Drawing, Engine Harness, Harness B, Harness D |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for Hexagon head bolt (7T) Nut, Coarse screw thread, M8 × 1.25 | 16.67 to 20.95 ft·lbf (22.6 to 28.4 N·m) | p. 82 |
| Hydraulic hose length change under high pressure | +2 % to -4 % | p. 15 |
| Tightening torque for Hydraulic Fitting, Parallel pipe thread G (PF), 1/4 | 16.6 to 20.3 ft·lbf (22.6 to 27.5 N·m) | p. 83 |
| Suction filter filtration accuracy | 105 μ | p. 27 |
| Return filter filtration accuracy | 10 μ | p. 27 |
| Fuel filter filtration area | 2000 sq.cm | p. 29 |
| Oil/water separator type | Float type | p. 29 |
| LO filter filtration area | 1160 sq.cm | p. 29 |
| Air cleaner filtration area | 1.93 sq.m | p. 30 |
| Tightening torque for Cooling water hose clip 48 | 1.8 to 2.5 ft·lbf (2.5 to 3.4 N·m) | p. 77 |
| Engine Oil Capacity | 10.5 L | p. 46 |
| Hydraulic Oil Capacity (in tank) | 60 L | p. 46 |
Yanmar ViO82 Common Problems This Manual Covers
Yanmar ViO82 hydraulic hose bulging, cracking at bends, or leaking at fittings p. 15
Inspect hoses for bulging, cracking, and abrasion at every bend and fitting. Under pressure, hoses can change length by +2% to -4% (page 15), so verify routing leaves adequate slack. Torque G (PF) 3/8 fittings to 44.1 to 53.9 N•m as shown on page 83. Replace any hose showing deformation or seepage before the next shift.
Manual Section: General Cautions for Maintenance WorkHydraulic system overheats and loses digging force after extended heavy use p. 25
Check the hydraulic oil level first; the tank holds 60 L (page 46) and low fluid accelerates heat buildup. Clean all debris from the cooling grille and verify the return filter (10 μ filtration, page 27) is not clogged. If performance stays low, check system relief pressure against the 25.8 MPa spec on page 25 before pulling any components.
Manual Section: Hydraulic SystemOne track slow or unresponsive while the other side pulls normally p. 791
Check track tension on both sides first; a loose track loses ground contact and mimics hydraulic failure. Clear debris from the drive sprocket and rollers. Use the quick reference table on page 791 to isolate travel motor from control valve faults. Confirm pilot pressure is within the 2.9 MPa cut-off valve spec shown on page 87.
Manual Section: TroubleshootingEngine starts but runs rough, loses power, or stalls under load p. 29
Drain the float-type water separator; water in fuel causes rough running faster than any other fault. Replace the fuel filter and bleed air from the lines. Still surging? Measure compression: spec is 3.33 to 3.53 MPa per page 29. Low numbers point to valve or ring wear; check clearance at 0.2 mm intake and exhaust on a cold engine.
Manual Section: EngineCoolant level drops repeatedly or overheating warning appears between service intervals p. 77
Inspect all coolant hoses for cracks and soft spots, then torque hose clips to 2.5 to 3.4 N•m (page 77). Clear debris from the radiator and grille; packed debris is the most common overheating trigger on this machine. Refill to 8.6 L (page 46) using correct coolant mix, then pressure-test the cap before returning to service.
Manual Section: EngineFrequently Asked Questions
How to reset Yanmar ViO82?
To reset the DPF regeneration after parts replacement, start and warm-up the engine until the cooling water temperature is 60 °C or higher. If no regeneration requests are displayed by the ECU, perform the stationary regeneration using SMARTASSIST DIRECT.
How to find torque specifications for ViO82?
Tightening torque specifications for the Yanmar ViO82 can be found in Chapter 3, 'Service Standards'. Specifically, refer to section 3-7 'List of Tightening Torque' on page 77, which includes tables for machine, engine, general bolts and nuts, and hydraulic fittings.
How to clear error codes on ViO82?
To clear error codes on the ViO82, connect the SMARTASSIST DIRECT (SA-D) tool to the engine wire harness. From the 'Diagnostic Codes' menu, select 'Defect History' and then press the 'All Clear' button to clear the error information.
What are the replacement specifications for hydraulic hoses?
Hydraulic hose specifications are detailed by part descriptions including material (e.g., Plastic), working pressure (e.g., 17.2 to 20.6 MPa), nominal diameter (e.g., 3/8"), fitting type (e.g., Taper pipe thread R (PT)), total length (e.g., 750 mm), and hose protector (e.g., Coil spring). These details are crucial for correct installation and performance.
Is this Service Manual a digital download?
Immediate download of the complete 803-page searchable Service Manual. Access it on any device, from a laptop at your desk to a phone in the field.
Are there any print restrictions on this manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Does this Yanmar ViO82 manual include hydraulic schematics?
Yes, this Yanmar ViO82 Service Manual includes hydraulic system diagrams, circuit schematics, and component specifications.
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