Part of the Hitachi Repair Manuals.
Looking for the Hitachi 33u technical manual PDF? All 533 pages here serve the Hitachi EX33u, 33u, and 30-2 hydraulic excavators, bundling the technical manual, workshop manual, and full engine service section in one download. You get the complete electrical circuit diagram, hydraulic schematics with main and pilot line routing, factory torque charts, and a full troubleshooting section for the engine control, monitor, and machine operation systems. Inside: pump device, swing device, control valve, and pilot valve teardowns, plus performance test standards and cylinder rebuild procedures. Test main pump delivery pressure against the 220 kgf/cm2 standard, and fail any boom cylinder that drifts past 10 mm in five minutes. Your excavator is down and the clock is running. Get factory numbers, not forum guesses. Bookmarked and keyword-searchable; pull it up on your phone next to the machine and start wrenching.
Complete the set for your EX33U
- Parts Catalog: Hitachi EX33U Parts Catalog
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Technical Manual - General | 2-9 | Machine Outline, Specifications, Working Ranges, Component Layout, Serial Numbers |
| Technical Manual - Upperstructure | 10-39 | Pump Device, Swing Device, Control Valve, Pilot Valve, Cylinders, Swivel Joint |
| Technical Manual - Undercarriage | 40-57 | Travel Device Specifications, Track Frame, Rollers and Idlers, Track Adjuster |
| Technical Manual - Electrical and Hydraulic Systems | 58-65 | Electrical Part Layout, Monitor Panel, Switches and Sensors, Hydraulic System Outline, Main and Pilot Lines |
| Technical Manual - Operational Performance Test | 66-97 | Engine Test, Excavator Test, Component Tests, Standard Values and Adjustment |
| Technical Manual - Troubleshooting | 98-142 | Diagnosing Procedure, Engine Control System Faults, Hydraulic and Electrical Troubleshooting Charts |
| EX33U Electrical Circuit Diagram | 143-144 | Battery and Starter Circuit, Engine Control, Monitor and Sensor Wiring, Full Machine Schematic |
| Workshop Manual - General Information | 145-163 | Precautions for Disassembling and Assembling, Tightening Torques, Special Tools, Sealants |
| Workshop Manual - Upperstructure | 164-243 | Canopy and Counterweight Removal, Hydraulic Pump, Swing Device, Control Valve, Cylinders, Swivel Joint Disassembly and Assembly |
| Workshop Manual - Undercarriage | 244-299 | Swing Bearing Removal, Travel Device Disassembly and Assembly, Track Frame, Rollers, Idler and Adjuster |
| Workshop Manual - Front Attachment | 300-333 | Boom, Arm and Bucket Removal, Pins and Bushings, Front Attachment Maintenance and Wear Limits |
| Engine - Full Repair Section (Bundled Engine Manual) | 334-533 | Engine Safety Instructions, Specifications and Performance Curves, Disassembly and Reassembly, Cylinder Head and Valves, Piston and Crankshaft, Lubrication, Cooling and Fuel Systems, Wear Limits and Torque Values |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Ground Pressure | 27.8 (0.28) kPa (kgf/cm²) for Canopy, 28.2 (0.29) kPa (kgf/cm²) for Cab | p. 5 |
| Main pump delivery pressure | 220 kgf/cm² | p. 97 |
| DIG DRIFT CHECK Boom Cylinder (Retraction) | 10 or less | p. 97 |
| DIG DRIFT CHECK Arm Cylinder (Extension) | 10 or less | p. 97 |
| Low engine oil pressure indicator stays ON | Check if oil filter is clogged or not. | p. 116 |
| Pilot primary pressure | 65 kgf/cm² or more | p. 127 |
| Low-pressure-hose clamp tightening torque (T-Bolt Type Band Clamp) | 4.4 N·m (0.45 kgf·m, 3.25 lbf·ft) | p. 160 |
| Low-pressure-hose clamp tightening torque (Worm Gear Type Band Clamp) | 5.9 to 6.9 N·m (0.6 to 0.7 kg.m, 4.3 to 5.1 lbf·ft) | p. 160 |
| Clearance between cylinder block bore and plunger | 0.050 mm or less | p. 181 |
| Clearance between plunger tip and shoe bottom | 0.2 mm or less | p. 181 |
| Socket bolts (6) torque | 3.3 to 4.4 N-m (0.35 to 0.45 kgf·m, 2.5 to 3.3 lbf-ft) | p. 240 |
| Bucket Capacity | 0.09 m3 | p. 5 |
