Part of the Yanmar Repair Manuals.
The moment a Yanmar ViO70 stops pulling evenly on one track, the fix starts with numbers: pilot pressures, piston clearances, torque values. This service manual for the US market ViO70 puts all of them on the bench, covering the machine end to end across 504 pages, including the 4TNE98-EBV diesel engine.
Inside are servicing standards for the undercarriage and hydraulic cylinders, full teardown and reassembly procedures for the hydraulic pump, control valve, pilot valve, swing motor, and travel motor, plus the hydraulic circuit schematic, the electric wiring diagram, and a troubleshooting section built around real symptoms like discontinuous arm movement and natural release of the bucket.
It is a standard PDF download, so you can keep it on a laptop in the cab or print just the pages you need and let them get dirty next to the open machine.
What's Inside This Yanmar ViO70 (US) Manual
| System | Pages | Key Topics |
|---|---|---|
| Vio70(US) | 1 | Main Specifications of Machine, Hydraulic Implement, Cylinder, Motor, Undercarriage, Engine |
| General Cautions for Maintenance Work | 5-13 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Attaching and Detaching Hydraulic Equipment |
| Technical Data | 14-23 | Specifications, External Drawings and Working Ranges (Canopy Type Specifications), Weight of Main Parts, Lifting Capacities |
| Servicing Standards | 24-42 | Machine Performance, Engine, Undercarriage (Rubber Track Specifications, Steel Track Specifications, Steel & Rubber Track Common Specifications), Control Devices |
| Hydraulic System | 43-81 | Outline (Function of Control Valve Operation, Additional Operation of Control Valve), Hydraulic Circuit Schematic |
| Hydraulic Equipment | 82-266 | 5-1 Hydraulic Pump, 5-2 Control Valve, 5-3 Pilot Valve, 5-4 Swing Motor, 5-5 Travel Motor |
| Adjustment Procedures for Each Equipment | 267-338 | Electric Equipment of the Machine (Arrangement of Electrical Equipment and Names of Parts, Monitor and Alarm Systems, Electric Wiring Diagram) |
| Periodic Inspection and Servicing | 339-341 | List of Periodic Inspection and Servicing |
| Fuel,Lube Oil and Grease Recommended | 342-344 | 8-1 Fuel, Lube Oil and Grease Recommended by Yanmar, 8-2 Cooling Water Recommended by Yanmar |
| Troubleshooting | 345-380 | Non Breakdowns (Natural Release of Bucket, Discontinuous Arm Movement, Thermal Shock of Travel Motor, Elongation of Boom Swing Cylinder on 58 Degrees Swing, Time Lag on Switching Travel Speed) |
| Reference Data | 381-382 | 10-1 Specifications for Attachment |
| Diesel Engine | 383-504 | Foreword, For Safe Servicing, Precautions for Safe Servicing, Contents, General, Troubleshooting, Engine Body |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Track deviation standard | Less than 11.8 in. (300 mm) | p. 26 |
| Hydraulic pump piston and cylinder block clearance | ≤ 0.0020 in. (0.050 mm) | p. 117 |
| New V-belt tension deflection (98 N finger pressure) | 0.276 to 0.354 (7 to 9) in. (mm) | p. 497 |
| Air cleaner type and filtration area | Cyclone type, 11.84 (7.1) sq.ft. (sq.m) | p. 19 |
| Thermostat actuation temperature | 157.1 to 162.5°F (69.5 to 72.5°C) | p. 408 |
| Engine Model | 4TNE98-EBV | p. 15 |
| Rated Engine Output | 57 HP (42 kW) at 1900 RPM | p. 15 |
| Fuel Tank Capacity | 29.0 Gals. (110 L) | p. 343 |
