Part of the Hitachi Repair Manuals.
Need real factory data for your Hitachi ZAXIS27U-2, 30U-2, 35U-2, 40U-2, or 50U-2? This 890-page Hitachi technical manual (OEM #T1MJ-E-00) covers the whole U-2 mini excavator family along with their Yanmar 3TNV82A through 4TNV106(T) engines. You get full electrical circuit diagrams with connector terminal locations for every harness: floor, main, engine, battery, even the immobilizer. Hydraulic circuit diagrams show relief valve pressure settings, and a huge troubleshooting-by-symptom section walks you from complaint to cause, backed by operational performance standards for travel speed, swing drift, and cylinder cycle times. Verify the overheat switch trips at 110°C (230°F), and run fuel filters rated at 5 microns, not whatever fits. A mistracking excavator will not diagnose itself. Bookmarked front to back; type a spec in the search bar, jump to the page, and get the machine digging again.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Circuit Diagrams and Harnesses | 1-22 | Hydraulic Circuit Diagrams, Electrical Circuit Diagrams, Floor, Main, Engine and A/C Harnesses, Immobilizer and Auto-Idle Sensor Harnesses, Auxiliary Flow Selector Valve |
| Technical Manual: Introduction and Safety | 23-56 | Safety Alert Symbols, Safety Instructions, Protective Equipment |
| Technical Manual: General | 57-86 | Specifications, Component Layout |
| Technical Manual: System | 87-134 | Control System, Hydraulic System |
| Technical Manual: Component Operation | 135-212 | Pump Device, Main and Pilot Pumps, Horse Power Control |
| Operational Performance Tests | 213-272 | Performance Test Preparation, Operational Performance Standards |
| Troubleshooting | 273-344 | Diagnosing Procedure, Error Indication List (ZX30U-2/35U-2), Diagnosis by Symptom, Engine System Troubleshooting |
| Workshop Manual: Safety and General | 345-399 | Safety Instructions, Floor-Tilting Device Operation |
| Workshop Manual: Upperstructure | 400-525 | Control Valve Removal and Installation, Pilot Valve Service, Swing Device |
| Workshop Manual: Undercarriage | 526-615 | Travel Device, Sprocket Wear Standards, Track Service |
| Workshop Manual: Front Attachment | 616-675 | Boom, Arm and Bucket Cylinders, Blade Cylinder, Boom Swing Service |
| Yanmar Tnv Engine Manual | 676-890 | Engine Disassembly, Inspection and Reassembly, Inspection and Adjustment Schedules, Starting Motor and Electrics |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Wire size | 0.5 mm | p. 218 |
| Inspection interval for electrical cables and wires | 8 to 10 hours | p. 51 |
| Engine Oil Filter Filtration | 25 μm | p. 83 |
| Fuel Filter Filtration | 5 μm | p. 83 |
| Overheat Switch Operating Temperature | 110°C (230°F) | p. 84 |
| Alternator rotating speed for starter relay 2 to stop magnetizing | 1350 ± 210 min-1 | p. 126 |
| ZAXIS27U-2 | ||
| ZAXIS27U-2 Operating Weight | 2720 kg | p. 61 |
| ZAXIS27U-2 Swing Speed | 9.1 min-1 | p. 61 |
| ZAXIS30U-2 | ||
| ZAXIS30U-2 Operating Weight | 2990 kg | p. 62 |
| ZAXIS30U-2 Swing Speed | 9.3 min-1 | p. 62 |
| ZAXIS35U-2 | ||
| ZAXIS35U-2 Operating Weight | 3400 kg | p. 63 |
| ZAXIS35U-2 Swing Speed | 9.3 min-1 | p. 63 |
