Part of the Hitachi Repair Manuals.
What's inside: the full two-book workshop set for the Hitachi ZAXIS 17U-2 mini excavator. The Technical Manual covers specs and component layout (11.0 kW engine at 2400 min-1, 1750 kg canopy / 1770 kg ROPS weights, 3900 mm dig reach), hydraulic and pilot circuit diagrams, wiring for the analog gauge cluster, and component operation for the pump, swing device, control valve, pilot valve, and travel motors. Then come the operational performance tests with pass/fail figures, plus symptom-based troubleshooting for actuators, swing, travel, and the front attachment. The second bound Disassembly manual walks the upperstructure, undercarriage, and cylinder teardowns with tightening torque tables. This is the book the dealer tech uses, not an owner's booklet.
What's Inside This Hitachi ZAXIS 17U-2 Manual
| System | Pages | Key Topics |
|---|---|---|
| Safety | 5-34 | - |
| General | 39-54 | Engine Specifications, Component Layout, Component Specifications |
| System | 59-98 | Hydraulic Circuit Outline, Pilot Circuit Diagram, Electrical Wiring Diagrams, Gauge Circuit |
| Component Operation | 101-169 | Pump Device, Swing Device, Control Valve, Pilot Valve, Travel Device |
| Operational Performance Test | 171-228 | Engine Test, Excavator Test, Component Test, Adjustment Procedures |
| Troubleshooting | 231-283 | Actuator System, Front Attachment, Swing System, Travel System, Electrical Inspection |
| Workshop Manual - Disassembly and Assembly (2nd Bound Document, Vol. W1MS-E) | 296-641 | Tightening Torque Tables, Painting, Bleeding Air, Upperstructure Teardown, Undercarriage Teardown, Front Attachment Cylinders |
| Engine (Yanmar 3TNV70) | 642-928 | Periodic Maintenance, Cylinder Head, Cylinder Block, Crankshaft, Camshaft, Engine Disassembly and Reassembly |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Operating Weight (2-Pillars Canopy) | 1750 kg | p. 39 |
| Operating Weight (ROPS 3-Pillars Canopy) | 1770 kg | p. 39 |
| Engine Rated Output | 11.0 kW / 2400 min-1 | p. 39 |
| Maximum Digging Reach | 3900 mm | p. 40 |
| Battery Capacity | 36 Ah | p. 50 |
| Engine Oil Filter Filtration | 20 um | p. 53 |
| Fuel Filter Filtration | 8 um | p. 53 |
| Swing Bearing / Track Mounting Bolt Torque | 50 N.m (5 kgf.m, 36 lbf.ft) | p. 342 |
| Sprocket Mounting Bolt Torque | 65 N.m (6.5 kgf.m, 47 lbf.ft) | p. 342 |
| Lower Roller Mounting Bolt Torque | 180 N.m (18 kgf.m, 130 lbf.ft) | p. 342 |
Hitachi ZAXIS 17U-2 Common Problems This Manual Covers
Insufficient power in every actuator - boom, arm, bucket, swing, and travel all weak
Start with hydraulic oil level and the suction filter, then main relief valve pressure, then pump condition. The Troubleshooting section's actuator system charts sequence these checks so you rule out the cheap causes before condemning the pump.
Manual Section: Troubleshooting - Actuator System Troubleshooting p. 245Machine digs fine cold but goes weak and slow once the oil is hot and under load
That pattern usually means internal wear letting hot, thin oil bypass in the pump or valves. The Operational Performance Test section gives engine, excavator, and component test procedures with spec values, so you measure actual output against standard instead of guessing.
Manual Section: Operational Performance Test - Excavator Test p. 193Jerky, spongy, or unresponsive hydraulics right after a filter change, hose repair, or pump swap
Almost always trapped air, not a bad part. Follow the air bleeding procedure covered in the manual's maintenance and performance test material, including bleeding the pump housing, before you chase anything else. Running a pump dry on trapped air is how a cheap repair becomes an expensive one.
Manual Section: General - Bleeding Air from Hydraulic Oil Tank p. 354Machine tracks crooked or one side travels slow
The travel system troubleshooting charts split the problem between the travel device, control valve, and pilot circuit, and the Component Operation section explains how the travel motor and counterbalance valve work so the test results actually mean something. Undercarriage teardown steps are in the Disassembly manual if the motor has to come off.
Manual Section: Troubleshooting - Travel System Troubleshooting p. 256Frequently Asked Questions
What is the swing bearing bolt torque on the ZAXIS 17U-2?
Swing bearing and track mounting bolts both take 50 N.m (5 kgf.m, 36 lbf.ft). The Disassembly manual opens with a tightening torque section listing these plus general bolt torques by size, so you are not guessing on reassembly. p. 342
What about undercarriage torque, like the lower rollers?
Lower roller mounting bolts are 180 N.m (18 kgf.m, 130 lbf.ft), a lot tighter than the track bolts, which is why people snap or lose them when they wing it. The undercarriage teardown section covers roller, idler, and travel device removal and refit. p. 342
Does this manual cover fault codes or a service alarm reset?
No, and that is correct for this machine. The ZX17U-2 uses analog gauges (fuel, hour meter, coolant temp) with no monitor or DTC system, so there are no codes to read or reset. Troubleshooting works from symptoms instead: the manual walks you from what the machine is doing to the circuit or component at fault.
How do I bleed air from the hydraulic system after service?
Any time you open the suction side, change the pump, or drain the tank, trapped air will make the machine jerky and starve the pump. The manual covers air bleeding of hydraulic components as part of the maintenance and performance test procedures, including the pump housing, so you do not score a new pump on its first hour. p. 354
All my actuators are slow. Will this book actually help me find why?
Yes, that exact complaint has its own path in the Troubleshooting section (actuator system). Because everything is slow at once, it points you upstream: oil level, suction filter, pump output, main relief. The Operational Performance Test section then gives measured checks so you can prove which one it is before buying parts. p. 245
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