Part of the Yanmar Repair Manuals.
All 554 pages of this Yanmar ViO25-6L Service Manual cover one compact excavator, front to back. Inside: full hydraulic circuit schematics detailing control valve operation and complete circuit behavior for boom, arm, bucket, swing, blade, and travel, plus wiring diagrams spanning the LCD monitor, auto deceleration system, and engine start/stop circuits. You also get a tightening torque section covering machine fasteners, engine bolts, and hydraulic fittings, a troubleshooting chapter with non-breakdown symptom tables and quick-reference fault guides, and a complete error code list for the auto deceleration alarm. Hydraulic hose working pressure runs 17.2 to 20.6 MPa; replace the fuel filter every 500 hours and inspect the water separator daily. Your machine is down. Open the PDF on any device, search by keyword, and get back to work.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment | |
| Technical Data | Specifications, Outline Drawing and Working Area, Weight List of Main Parts, Lifting Capacity List, Specifications for Attachment, Periodic Inspection and Servicing, Fuel | |
| Service Standards | Machine Performance, Undercarriage (Rubber Track Specifications, Steel Track Specifications, Common Specifications of Steel & Rubber Crawlers), Controls | |
| Engine | Before You Begin Servicing, Special Service Tools, Measuring Instruments, Cylinder Head, Measuring and Adjusting Valve Clearance, Crankshaft and Camshaft Components | |
| Electric System | Electric Equipment of Machine (Parts Layout of Electrical Equipment, LCD Monitor and Alarm Systems), Circuit Description of Engine Start and Stop (Battery Charge) | |
| Hydraulic System | Outline (Control Valve Operation, Additional Operation of Control Valve) | |
| Adjustment and Repair | Engine and Electric Equipment (Removal Reinstallation: Starter Motor, Radiator and Oil Cooler, Fan Belt) |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Fuel filter filtration area | 432 sq.cm | p. 31 |
| Fuel filter replacement interval | Every 500h | p. 38 |
| Oil/water separator type | Mesh filter | p. 31 |
| Water separator inspection/servicing interval | Daily | p. 38 |
| Example hydraulic hose working pressure | 17.2 to 20.6 MPa | p. 17 |
| Example hydraulic hose length | 75 cm | p. 17 |
| Suction filter filtration area | 697 sq.cm | p. 28 |
| Suction filter filtration accuracy | 150 u | p. 28 |
| Cooling water hose clip 41 tightening torque | 2.45 to 2.94 N·m | p. 67 |
| Coolant hose replacement interval | Every 2000h / Every two years | p. 38 |
| Fan belt size | 36 | p. 31 |
| Fan belt pressing force | 98 N | p. 68 |
