Part of the Hitachi Repair Manuals.
Wrenching on a Hitachi ZX27U-3, ZX30U-3, or ZX35U-3? This 779-page Technical Manual PDF (OEM #T1ND-E) handles the whole mini excavator family, F variants included. Inside: hydraulic schematics with full circuit routing, factory wiring diagrams, and a heavy troubleshooting block split into diagnosing procedures A through C plus electrical system inspection. You also get operational performance test standards for engine, excavator, and component checks, then complete workshop teardowns covering the pump device, swing device, control valve, travel motors, and the undercarriage down to the track adjuster and rollers. Fill the radiator with 2.4 L of coolant and the oil cooler with 1.0 L; swap the air element when the restriction indicator hits -6.23 kPa. Your machine is stuck in the mud, and forum threads won't unstick it. Bookmarked by section; pull it up on your phone at the machine and start wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Technical Manual | 1-4 | Introduction, Additional References, Manual Composition, Page Number |
| Safety | 5-38 | Recognize Safety Information, Understand Signal Words, Follow Safety Instructions, Prepare for Emergencies, Wear Protective Clothing, Protect Against Noise, Inspect Machine |
| General | 39-72 | Specifications, Component Layout, Component Specifications |
| System | 73-130 | Control System, Hydraulic System, Electrical System |
| Component Operation | 131-212 | Pump Device, Swing Device, Control Valve, Pilot Valve, Travel Device, Others |
| Operational Performance Test | 213-270 | Introduction, Standard, Engine Test, Excavator Test, Component Test, Adjustment |
| Troubleshooting | 271-400 | Diagnosing Procedure, Troubleshooting a, Troubleshooting B, Troubleshooting C, Electrical System Inspection |
| Workshop Manual | 401-470 | General (Precautions for Disassembling and Assembling, Tightening, Painting, Bleeding Air From Hydraulic Oil Tank, Floor-Tilting Device) |
| Upperstructure | 471-620 | Canopy and Cab, Counterweight, Pump Device, Control Valve, Swing Device, Pilot Valve, Solenoid Valve |
| Undercarriage | 621-698 | Swing Bearing, Travel Device, Center Joint, Track Adjuster, Front Idler, Upper and Lower Roller, Track |
| Attachment | 699-779 | Removal and Installation of Front Attachment, Front Attachment Weight, Installation of Front Attachment, Maintenance Standard, Side Cutter, Point |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Radiator Capacity | 2.4 L | p. 62 |
| Oil Cooler Capacity | 1.0 L | p. 62 |
| Engine Oil Filter | 20 μm (Nominal) | p. 68 |
| Air Filter (with mechanical indicator) | -6.23 kPa | p. 68 |
| Fuel Filter | 5 μm (Nominal) | p. 68 |
| Travel device mounting bolts (5) torque | 110 Nm | p. 627 |
| Cover (3) bolts (2) torque | 50 Nm | p. 628 |
| Hose connection torque (19 mm) | 29.5 Nm | p. 627 |
| Hose connection torque (22 mm) | 39 Nm | p. 627 |
| Upper Roller Standard A | 100 mm (3.94 in) | p. 690 |
| Upper Roller Standard B | 70 mm (2.76 in) | p. 690 |
| Axle Outer Diameter Standard | 25.0 mm (0.98 in) | p. 691 |
