Part of the Yanmar Repair Manuals.
All 469 pages of this Yanmar ViO33U Service Manual focus on one machine: the ViO33U compact excavator, with factory procedures covering engine, hydraulic system, electrical, and undercarriage from the ground up. You get hydraulic circuit schematics with full circuit operation and pressure adjustment, wiring diagrams for the alternator, starter motor, and complete machine electrics, plus a detailed troubleshooting section and exploded-view drawings across every major assembly. Open to the Service Standards chapter and you'll find torque tables, clearance specs, machine performance benchmarks, and hydraulic cylinder data all in one place. Torque the track roller M16 bolts to 291-339 N·m, set engine oil pressure between 0.34 and 0.49 MPa, and top the hydraulic tank to its 60 L capacity. No more hunting spec forums at midnight. Bookmarked and keyword-searchable; pull it up on your tablet at the machine and start wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 8-17 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 18-31 | 2-1 Specifications, 2-2 Outline Drawing and Working Area, 2-3 Weight List of Main Parts, 2-4 Lifting Capacity List |
| Service Standards | 32-55 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications, Steel Crawler Specifications, Common Specifications of Steel & Rubber Crawlers), Controls |
| Engine | 56-199 | 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 Electric Wiring |
| Electric System | 200-211 | 5-1 Electric Equipment of Machine, 6-2 Hydraulic Circuit Schematic |
| Hydraulic System | 212-379 | 6-1 Outline, 6-3 Circuit Operation, 6-4 Pressure Adjustment, 6-5 Hydraulic Pump, 6-6 Control Valve, 6-7 Pilot Valve, 6-8 Swing Motor, 6-9 Travel Motor |
| Adjustment and Repair | 380-469 | 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 |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for Track roller bolts | 291 to 339 N·m | p. 49 |
| Tightening torque for Hydraulic hose with parallel pipe thread (1/8) | 12 to 14 N·m | p. 54 |
| Hydraulic oil tank capacity | 60 L | p. 23 |
| Engine oil pressure at rated engine RPM (3TNV82A) | 0.34 - 0.49 MPa | p. 157 |
| Fuel filter filtration area | 2000 cm² | p. 25 |
| Tightening torque for Safety starter switch (2-speed pedal) lock nut | 29 to 35 N·m | p. 49 |
| Headlight voltage-wattage rating | 12-55 V-W | p. 26 |
| Engine Model | 3TNV82A-NBV2A | p. 24 |
| Total Engine Displacement | 1331 cm3 | p. 24 |
| Rated Engine Output | 18.9 kW at 2500 rpm | p. 24 |
| System Relief Set Pressure (P1, P2) | 20.6 MPa | p. 21 |
| Intake Valve Clearance (Cold engine) | 0.15 to 0.25 mm | p. 25 |
