Part of the Hitachi Repair Manuals.
All 789 pages of this Hitachi EX33Mu, 58Mu technical manual PDF focus on two machines: the EX33Mu and EX58Mu hydraulic excavators, plus their 30-2 and 55UR equivalents. You get separate hydraulic circuit schematics for each model, wiring diagrams for the full control system, and operational performance tests that tell you whether the pump, swing device, or travel motors are actually out of spec. A complete workshop manual rides along too, with teardown procedures for the upperstructure, undercarriage, front attachment cylinders, and both the 33Mu and 58Mu engines. Set the EX33Mu main relief valve to 220 ± 10 kgf/cm², and remember the four-second hydraulic timer before you condemn a slow circuit. No more guessing which relief valve is bleeding off your breakout force. Bookmarked from cover to cover; jump straight to the section you need and start wrenching.
Complete the set for your EX33Mu, 58Mu
- Parts Catalog: Hitachi EX33MU Excavator Parts Catalog
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Introduction and Safety | 2-29 | To the Reader, Page Numbering and References, Safety Precautions, Warning Signs, Safe Operation and Maintenance Rules |
| General Specifications | 30-39 | Machine Specifications, Bucket Capacity, Swing Speed, Dimensions, Component Interchangeability |
| Upperstructure (Technical) | 40-69 | Canopy, Counterweight, Pump Device, Control Valve, Swing Device, Pilot Valve, Hydraulic Oil Tank |
| Undercarriage (Technical) | 70-87 | Travel Device, Track Frame, Center Joint, Swing Bearing |
| Electrical System | 88-99 | Electrical Component Layout, Control System, Sensors and Switches, Wiring Harness |
| Hydraulic System | 100-105 | Hydraulic Circuit Overview, Main and Overload Relief Valves, Hydraulic Timer, Pilot Circuit |
| Operational Performance Test | 106-141 | Engine Test, Excavator Performance Test, Component Tests, Cylinder Drift Limits, Main Relief Valve Pressure Setting |
| Troubleshooting | 142-205 | Diagnosing Procedure, Engine Control System Faults, Hydraulic System Faults, Electrical Faults, Standard Values Table |
| Hydraulic Circuit Diagrams (EX33MU and EX58MU) | 206-210 | Blade, Arm, Bucket and Swing Cylinder Circuits, Travel Circuit, Pilot Circuit, Circuit Differences Between EX33MU and EX58MU |
| Workshop Manual: Safety and General Information | 211-250 | Precautions for Disassembling and Assembling, Tightening Torques, Special Tools, Sealants and Lubricants |
| Workshop Manual: Upperstructure Repair | 251-350 | Canopy and Counterweight Removal, Pump Device Disassembly, Control Valve Overhaul, Swing Device, Pilot Valve, Hydraulic Oil Tank Service |
| Workshop Manual: Undercarriage Repair | 351-431 | Swing Bearing, Travel Device Disassembly, Center Joint, Track Adjuster and Idler, Rollers, Track Chain |
| Workshop Manual: Front Attachment | 432-469 | Boom, Arm and Bucket Removal, Hydraulic Cylinder Disassembly and Inspection, Pin and Bushing Wear Limits |
| Engine : EX33MU | 470-667 | Engine Specifications and Performance, Cylinder Head and Valves, Piston and Crankshaft, Lubricating, Cooling and Fuel Systems, Engine Oil Pressure Limits, Overhaul Data |
| Engine : EX58MU | 668-789 | Engine Specifications, Lubricating System, Cooling System, Fuel System, Cylinder Head and Block, Overhaul and Service Data |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| EX33MU | ||
| Main Relief Valve Pressure Setting | 220 ± 10 kgf/cm² | p. 141 |
| Main Pump Delivery Pressure (standard), EX33MU | 220 kgf/cm² (tolerance +10 / -0) | p. 190 |
| EX58MU | ||
| Main Pump Delivery Pressure (standard), EX58MU | 250 kgf/cm² (tolerance +10 / -0) | p. 190 |
| All Models | ||
| Boom Cylinder Drift Limit (retraction) | 10 mm or less per 5 min | p. 140 |
| Arm Cylinder Drift Limit (extension) | 10 mm or less per 5 min | p. 140 |
| Engine Oil Pressure (at idle) | 0.5 kgf/cm² (49 kPa, 7 psi) | p. 626 |
| Engine Oil Pressure (at rated speed, allowable limit) | 2.5 kgf/cm² (245 kPa, 36 psi) | p. 626 |
| Bucket Capacity | 0.09 m³ | p. 34 |
| Swing Speed | 11 rpm | p. 34 |
| Hydraulic Timer Delay | 4 seconds | p. 55 |
