Part of the Yanmar Repair Manuals.
All 709 pages of this Yanmar ViO33-6, ViO38-6 Service Manual are factory-written for one purpose: returning your compact excavator to spec. Inside: hydraulic circuit schematics with complete fluid routing for both models, including the ViO38-6 ESS proportional solenoid valve, wiring diagrams covering the engine ECU and full machine electrical circuits, and a torque table section spanning machine fasteners, engine bolts, and hydraulic fittings. You also get error code lists for the electronic control system, step-by-step procedures for every major assembly from swing motor to fuel injection pump, and a troubleshooting quick-reference table to pinpoint faults fast. Torque the travel motor-to-track frame M12x30 bolts to 57.9-72.3 ft·lbf (78.5-98.0 N·m); idler seal cover to crawler adjust spring runs 32.6-43.4 ft·lbf (44.1-58.9 N·m). Your machine is down and the clock is running. Download now, jump to any section with bookmarks, and get the factory answer before you pull another bolt.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 12-23 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 24-67 | 2-1 Specifications, 2-2 Outline Drawing and Working Area, 2-3 Weight List of Main Parts, 2-4 Lifting Capacity List, 2-5 Specifications for Attachment |
| Service Standards | 68-101 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications, Steel Crawler Specifications, Common Specifications of Steel & Rubber Crawlers), Controls |
| Engine | 102-265 | 4-1 Engine, 4-2 Fuel System, 4-3 Cooling System, 4-4 Lubrication System, 4-5 Starter Motor, 4-6 Alternator, 4-7 Electronic Control System, 4-8 Electric Wiring |
| Electric System | 266-299 | 5-1 Electric Equipment of Machine, 5-2 Electronic Control System, 5-3 Engine ECU (Engine Controller), 5-4 Error Code List |
| Hydraulic System | 300-545 | 6-1 Outline, 6-2 Circuit Operation, 6-3 Hydraulic Pump, 6-4 Control Valve, 6-5 Pilot Valve, 6-6 Swing Motor, 6-7 Travel Motor, 6-8 Ess Proportional Solenoid Valve (ViO38-6 Only) |
| Adjustment and Repair | 546-694 | 7-1 Engine and Electric Equipment, 7-2 Undercarriage, 7-3 Controls, 7-4 Swing Bearing, 7-5 Hydraulic Equipment, 7-6 Work Implements, 7-7 Cabin, 7-8 Air Conditioner |
| Troubleshooting | 695-709 | 8-1 Non-Breakdowns, 8-2 Quick Reference Table for Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Idler seal cover × Crawler adjust spring tightening torque | 32.6 to 43.4 ft·lbf (44.1 to 58.9 N·m) | p. 86 |
| Travel motor × Track frame tightening torque | 57.9 to 72.3 ft·lbf (78.5 to 98.0 N·m) | p. 87 |
| Fuel filter filtration area | 310 (2000) sq.in. (sq.cm) | p. 29 |
| Suction filter type | CT-12W | p. 27 |
| Suction filter filtration area | 108 (697) sq.in. (sq.cm) | p. 27 |
| Air cleaner type | Cyclone type | p. 29 |
| Air cleaner filtration area | 12.8 (1.19) sq.ft. (sq.m) | p. 29 |
| Cooling water hose (Hose clip 41) tightening torque | 2.9 to 3.6 ft·lbf (3.9 to 4.9 N·m) | p. 85 |
| Cooling water hose (Hose clip 48) tightening torque | 3.6 to 4.4 ft·lbf (4.9 to 5.9 N·m) | p. 85 |
| Air cleaner intake hose (Hose clip 70) tightening torque | 1.8 to 2.5 ft·lbf (2.5 to 3.4 N·m) | p. 85 |
| Fan belt size | A38 | p. 29 |
| Oil/water separator filter mesh | 100 mesh | p. 29 |
