Hitachi EX33Mu and EX58Mu Excavator Technical & Workshop Service Manual

Description

Hitachi EX33Mu and EX58Mu Excavator Technical & Workshop Service Manual

Master the servicing, system diagnostics, and mechanical overhaul of your compact excavators with this complete Hitachi EX33Mu and EX58Mu Excavator Technical & Workshop Service Manual. Specially developed for service technicians and workshop mechanics, this technical document delivers direct factory insights into the operational theory, structural layouts, hydraulic schematics, and electrical monitoring systems across both the Hitachi EX33Mu and Hitachi EX58Mu mini excavators.

Document & Technical File Details

• Manual Type: Technical Manual (T/M) & Workshop Manual (W/M)
• Brand: Hitachi Construction Machinery
• Models Covered: EX33Mu, EX58Mu (with reference interchangeability for 30-2 and 55UR)
• Language: English
• Page Count: 789 pages
• File Format: Portable Document Format (PDF)
• Document Identification: Publications Marketing & Product Support reference 588T series

Chapters & Technical Sections Covered

• Section 01 – General Information:
  • Group 01 – Specifications: Machine layout outlines, dimensions, working ranges, transportation profiles, and bucket capacities.
  • Group 01 – Engine Specifications: Comprehensive data for Kubota D1503-KA and Isuzu 4LE1PA-01 diesel engines.
  • Group 02 – Component Interchangeability: Cross-model interchangeability charts between EX33Mu, EX58Mu, 30-2, and 55UR.
  Complete PDF Bookmark Tree

  Complete Bookmarks

  The complete bookmarks in the “Hitachi EX33Mu and EX58Mu Excavator Technical & Workshop Service Manual” are as follows:

  Return to Contents

  +TECHNICAL MANUAL EX33Mu, 58Mup. 1

  INTRODUCTIONp. 2

  SAFETYp. 4

  +SECTION 1 GENERALp. 30

  +Specificationsp. 32

  Outlinep. 32

  Specificationsp. 34

  Working Ranges and Machine Dimensions for Transportationp. 35

  Engine Specificationsp. 36

  +Interchangeabilityp. 38

  Component Interchangeablilty Listp. 38

  +SECTION 2 UPPERSTRUCTUREp. 40

  +Generalp. 42

  Outlinep. 42

  +Pump Devicep. 44

  Outlinep. 44

  Main Pumpp. 45

  +Swing Devicep. 48

  Outlinep. 48

  Swing Reducition Gearp. 49

  Swing Motorp. 50

  Brake Valvep. 52

  Parking Brakep. 54

  +Control Valvep. 56

  Outlinep. 56

  Flow Combiner Valvep. 57

  Main Relief Valvep. 58

  Overload Relief Valvep. 59

  Make-Up Valvep. 61

  +Pilot Valvep. 62

  Outlinep. 62

  Constructionp. 63

  Functionp. 64

  Operationp. 65

  +Othersp. 68

  Solenoid Valvep. 68

  +SECTION 3 UNDERCARRIAGEp. 70

  +Generalp. 72

  Outlinep. 72

  +Travel Devicep. 74

  Outlinep. 74

  Travel Motorp. 75

  Travel Brake Valvep. 77

  Travel Motor Swash Angle Controlp. 78

  Counterbalane Valvep. 80

  Relief Valvep. 81

  Travel Reduction Gearsp. 82

  +Othersp. 84

  Swing Bearingp. 84

  Center Jointp. 85

  Track Adjusterp. 87

  +SECTION 4 ELECTRICAL SYSTEMp. 88

  +Generalp. 90

  Electrical Part Layoutp. 90

  +Control Systemp. 94

  Outlinep. 94

  Auto Boom-Stop Systemp. 95

  Height Restriction Systemp. 96

  Auto Boom-Stop System Initial Settingp. 97

  +SECTION 5 HYDRAULIC SYSTEMp. 100

  +Generalp. 102

  Outlinep. 102

  +SECTION 6 OPERATIONAL PERFORMANCE TESTp. 106

  +Introductionp. 108

  Purposep. 108

  Preparation for Performance Testsp. 110

  +Engine Testp. 112

  Engine Speedp. 112

  Engine Compression Pressurep. 113

  Valve Clearancep. 114

  Test Fuel Injection Nozzlesp. 115

  Injection Timingp. 117

  +Excavator Testp. 120

  Travel Speedp. 120

  Track Revolution Speedp. 121

  Mistrack Checkp. 122

  Travel Motor Leakagep. 123

  Swing Speedp. 124

  Swing Function Drift Checkp. 125

  Swing Motor Leakagep. 126

  Maximum Swingable Slant Anglep. 127

  Swing Bearing Playp. 128

  Hydraulic Cylinder Cycle Timep. 129

  Dig Function Drift Checkp. 130

  Control Lever and Pedal Operating Forcep. 131

  Control Lever and Pedal Strokep. 132

  +Component Testp. 136

  Pilot Pressurep. 136

  Main Relief Valve Pressure Settingp. 137

  Overload Relief Valve Pressure Settingp. 138

  Swing Motor Relief Valve Pressure Settingp. 139

  +Standardp. 140

  Performance Standard Tablep. 140

  +SECTION 7 TROUBLESHOOTINGp. 142

  +Diagnosing Procedurep. 144

  Introductionp. 144

  Diagnosing Procedurep. 144

  How to Read the Troubleshooting Flow Chartsp. 146

  Check Battery Voltagep. 146

  EX Operation Manual for Auto Boom-Stop Systemp. 147

  Fault Code Listp. 152

  Operation Record Listp. 153

  Monitoring Item Listp. 154

  System Operation Statusp. 157

  Troubleshooting Screen Flow Chartp. 159

  +Engine Control Systemp. 162

  Enginep. 162

  Starter Does Not Rotatep. 163

  +Monitor Systemp. 166

  Monitor Panelp. 166

  Fuse Failsp. 167

  Malfunction of Coolant Temperature Gaugep. 169

  Malfunction of Fuel Gaugep. 171

  Malfunction of Alternator Indicatorp. 173

  Malfunction of Engine Oil Pressure Indicatorp. 174

  Malfunction of Overheat Indicatorp. 175

  Malfunction of Fuel Level Indicatorp. 176

  Malfunction of Air Filter Restriction Indicatorp. 177

  Malfunction of Buzzerp. 178

  Malfunction of Hour Meterp. 179

  Malfunction of Fast Travel Indicatorp. 180

  Electrical Test Precautionsp. 181

  Continuity Checkp. 182

  Voltage Checkp. 183

  +Auto Boom-Stop Function · Height Restriction Functionp. 184

  Auto Boom-Stop Function Checkp. 184

  Pilot Control Shut-Off Lever Circuit Checkp. 186

  Angle Sensor System Checkp. 187

  Height Restriction Function Checkp. 188

  +Machine Operation Systemp. 190

  Actuator System Trroubleshootingp. 190

  Front Attachment System Troubleshootingp. 192

  Swing System Troubleshootingp. 195

  Travel System Troubleshootingp. 200

  EX33Mu Hyd. Circuitp. 206

  EX58Mu Hyd. Circuitp. 207

  +WORKSHOP MANUAL EX33Mu, 58Mup. 208

  INTRODUCTIONp. 209

  SAFETYp. 211

  +SECTION 1 GENERAL INFORMATIONp. 237

  +Precautions for Disassembling and Assemblingp. 239

  Precautions for Desasembbling and Assemblingp. 239

  Maintenance Standard Terminologyp. 242

  +Tighteningp. 243

  Tighening Torque Specificationsp. 243

  Torque Chartp. 245

  Piping Jointp. 248

  +SECTION 2 UPPERSTRUCTUREp. 251

  +Canopyp. 253

  Remove and Install Canopyp. 253

  +Counterweightp. 255

  Remove and Insall Counterweightp. 255

  +Pump Devicep. 259

  Remove and Install Pump Devicep. 259

  Disassemble and Assemble Pump Device (33Mu)p. 261

  Disassemble and Assemble Pump Device (58Mu)p. 268

  Maintenance Standardp. 275

  +Control Valvep. 277

  Remove and Install Control Valvep. 277

  Disassemble and Assemble Control Valvep. 281

  +Swing Devicep. 293

  Remove and Install Swing Devicep. 293

  Disassemble and Assemble Swing Reduction Gear (33Mu)p. 297

  Disassemble and Assemble Swing Reduction Gear (58Mu)p. 304

  Disasemble and Assemble Swing Motor (33Mu)p. 310

  Disasemble and Assemble Swing Motor (58Mu)p. 317

  Disassemble and Assemble Parking Brake Switch Valvep. 324

  Maintenance Standardp. 326

  +Pilot Valvep. 327

  Remove and Install Front Pilot Valvep. 327

  Remove and Install Swing Pilot Valvep. 329

  Disassemble Front Pilot Valvep. 330

  Assemble Front Pilot Valvep. 332

  Disassemble Swing Pilot Valvep. 336

  Assemble Swing Pilot Valvep. 338

  +Solenoid Valvep. 341

  Disassemble and Assemble Auto Boom-Stop Solenoid Valvep. 341

  Disassemble and Assemble Pilot Control Shut-Off Lever/Travel Speed Change Solenoid Valvep. 345

  +SECTION 3 UNDERCARRIAGEp. 351

  +Swing Bearingp. 353

  Remove and Install Swing Bearingp. 353

  +Travel Devicep. 355

  Remove and Install Travel Devicep. 355

  Disassemble and Assemble Travel Device (33Mu)p. 358

  Disassemble and Assemble Travel Device (58Mu)p. 379

  Maintenance Standardsp. 398

  +Center Jointp. 402

  Remove and Install Center Jointp. 402

  Disassemble Center Jointp. 405

  Assemble Center Jointp. 407

  +Track Adjusterp. 410

  Remove and Install Track Adjusterp. 410

  +Front Idlerp. 412

  Remove and Install Front Idlerp. 412

  Maintenance Standardsp. 413

  +Upper and Lower Rollersp. 416

  Remove and Install Upper Rollerp. 416

  Remove and Install Lower Rollerp. 418

  Maintenance Standardsp. 420

  +Trackp. 424

  Remove and Install Rubber Crawlerp. 424

  Maintenance Standardsp. 427

  +SECTION 4 FRONT ATTACHMENTp. 432

  +Front Attachmentp. 434

  Remove and Install Front Attachmentp. 434

  Maintenance Standardsp. 441

  +Cylindersp. 448

  Remove and Install Cylindersp. 448

  Disassemble Cylindersp. 455

  Assemble Cylindersp. 461

  Tightening Torque Specificationsp. 467

  Maintenance Standardsp. 468

  +SECTION 5 ENGINE 33Mup. 470

  Safety Instructionsp. 474

  Specificationsp. 480

  Performance Curvesp. 486

  Dimensionsp. 489

  +M. MECHANISMp. 490

  F. Featurep. 491

  +1. Engine Bodyp. 493

  [1] Cylinder Blockp. 493

  [2] Cylinder Headp. 493

  [3] Crank Shaftp. 495

  [4] Piston and Piston Ringsp. 495

  [5] Conecting Rodp. 495

  [6] Camshaftp. 497

  [7] Flywheelp. 497

  [8] Rocker Armp. 497

  +2. Lubricating Systemp. 499

  [1] Generalp. 499

  [2] Oil Pumpp. 501

  [3] Relief Valvep. 501

  [4] Oil Filter Cartridgep. 503

  [5] Oil Pressure Switchp. 503

  +3. Cooing Systemp. 505

  [1] Generalp. 505

  [2] Water Pumpp. 505

  [3] Thermostatp. 507

  [4] Radiatorp. 507

  [5] Radiator Capp. 507

  +4. Intake/Exhaust Systemp. 509

  [1] Air Cleanerp. 509

  [2] Mufflerp. 509

  +5. Fuel Systemp. 511

  [1] Generalp. 511

  [2] Injection Pumpp. 511

  [3] Injection Nozzlep. 517

  [4] Fuel Filterp. 517

  [5] Fuel Lift Pumpp. 519

  [6] Governorp. 521

  +6. Electrical Systemp. 525

  [1] Charging Systemp. 525

  +S. DISASSEMBLING AND SERVICINGp. 527

  +G. Generalp. 528

  [1] Engine Identificationp. 528

  [2] General Precautionsp. 530

  [3] Tightening Torquesp. 532

  [4] Troubleshootingp. 535

  [5] Servicing Specificationsp. 543

  [6] Maitenance Check Listp. 559

  [7] Check and Maintenancep. 562

  [8] Special Toolsp. 572

  +1. Engine Bodyp. 580

  Checking and Adjusteingp. 580

  +Disassembling and Assemblingp. 582

  [1] Draining Water and Oilp. 582

  [2] External Componentsp. 582

  [3] Cylinder Head and Valvesp. 584

  [4] Gear Casep. 586

  [5] Piston and Connecting Rodp. 594

  [6] Flywheel and Crankshaftp. 598

  +Servicingp. 600

  [1] Cylinder Headp. 600

  [2] Timing Gear and Camshaftp. 608

  [3] Piston and Connecting Rodp. 612

  [4] Crankshaftp. 616

  [5] Cylinder Borep. 624

  +2. Lubricating Systemp. 626

  Checkingp. 626

  +Servicingp. 626

  [1] Oil Pumpp. 626

  +3. Cooling Systemp. 628

  +Checkingp. 628

  [1] Fan Beltp. 628

  [2] Radiatorp. 628

  Disassembling and Assemblingp. 630

  +4. Fuel Systemp. 632

  +Checking and Adjustingp. 632

  [1] Injection Pumpp. 632

  [2] Injection Nozzlep. 634

  +Disassembling and Assemblingp. 636

  [1] Injection Pumpp. 636

  [2] Injection Nozzlep. 636

  +5. Electrical Systemp. 638

  +Checkingp. 638

  [1] Starterp. 638

  [2] Glow Plugp. 638

  [3] Alternator and Regulatorp. 640

  +Disassembling and Assemblingp. 650

  [1] Starterp. 650

  [2] Alternatorp. 652

  +Servicingp. 660

  [1] Starterp. 660

  [2] Alternatorp. 664

  +SECTION 6 ENGINE 58Mup. 668

  +General Informationp. 670

  General Repair Instructionp. 671

  Notes on the Format of this Manualp. 671

  Appearancep. 674

  Main Data and Specificationsp. 676

  Tightening Torque Specificationsp. 678

  Angular Nut and Bolt Tightening Methodp. 680

  Tightening Torque on Major Componentsp. 682

  Gasket Locationp. 688

  Maintenancep. 690

  Recommended Lubricating Oilp. 695

  +Enginep. 696

  Disassemblyp. 697

  Inspection and Repairp. 711

  Reassemblyp. 728

  +Lubricating Systemp. 752

  Lubricating Oil Circulation System Diagramp. 753

  Oil Pumpp. 754

  +Cooling Systemp. 756

  Cooling Water Circulation System Diagramp. 757

  Water Pumpp. 758

  Thermostatp. 760

  +Fuel Systemp. 762

  Fuel Circulation System Diagramp. 763

  Governorp. 764

  Nozzle Holder Assemblyp. 772

  Troubleshootingp. 774

  Special Toolsp. 780

  +Conversion Tablep. 782

  Lengthp. 782

  Areap. 784

  Volumep. 784

  Massp. 786

  Pressurep. 787

  Torquep. 788

  Temperaturep. 789

• Section 02 – Upperstructure:
  • Group 01 – General: Component layout including pump device, swing unit, fuel/hydraulic tanks, control valves, and counterweight.
  • Group 02 – Pump Device: Variable-displacement swash plate axial plunger pump, dual-delivery valve plate construction, and gear pilot pump.
  • Group 03 – Swing Device: Planetary swing reduction gears, axial piston swing motor, shockless two-stage brake relief valve, make-up valve, multi-disc wet parking brake, and 4-second hydraulic delay timer.
  • Group 04 – Control Valve: Multi-spool valve assembly, flow combiner valve for straight travel tracking, main relief valves, actuator overload relief valves, and cavitation make-up valves.
  • Group 05 – Pilot Valve: Pilot pressure generation, push-rod metering strokes, control lever spool displacement, and pressure characteristics.
  • Group 06 – Solenoid Valves: Pilot shut-off circuit, two-speed travel swash angle control, and proportional solenoid valves for auto boom-stop deceleration.
• Section 03 – Undercarriage:
  • Group 01 – General: Track frame, dozer blade, blade cylinder, center joint, swing bearing, front idler, rollers, and rubber/steel crawler tracks.
  • Group 02 – Travel Device: Variable displacement axial plunger travel motors, automatic 2-speed swash plate control pistons, counterbalance valves, shockless crossover relief valves, and 2-stage planetary reduction final drives.
  • Group 03 – Undercarriage Components: Single-row ball swing bearing, 360-degree rotating center joint hydraulic passage distribution, and grease cylinder track adjusters with recoil springs.
• Section 04 – Electrical System:
  • Group 01 – General: Complete electrical component layout, monitor instrument cluster, indicator circuits, preheat timer, and switch panels.
  • Group 02 – Control System: Auto boom-stop safety system, boom and swing angle sensors, cab/canopy clearance buffer zones, height restriction settings, initial calibration setup, and Dr. EX monitor voltage ranges.
• Section 05 – Hydraulic System:
  • Group 01 – General: Complete factory hydraulic schematics with circuit routing for travel, swing, boom, arm, bucket, auxiliary lines, and pilot systems.

By compiling operational principles, hydraulic routing diagrams, and electrical controls into one reference, this manual supplies field mechanics with the exact engineering data needed to trace fluid flow, pinpoint pressure drops, set hydraulic relief limits, and maintain peak excavator responsiveness under tough working conditions.

In-Depth Powertrain & Hydraulic Engineering

Every critical assembly on the Hitachi EX33Mu and Hitachi EX58Mu is explained in structural detail. The manual provides technical specifications for both diesel powerplants, detailing the 3-cylinder Kubota D1503-KA (1.499 L rated at 16.9 kW / 23 PS at 2,000 rpm) and the 4-cylinder Isuzu 4LE1PA-01 (2.179 L rated at 29.4 kW / 40 PS at 2,100 rpm), including compression ratios, injection pump architectures, starter ratings, and alternator outputs. Technicians can reference precise operating pressures, including main circuit relief thresholds of 24.5 MPa (250 kgf/cm²), overload relief pressures up to 26.5 MPa (270 kgf/cm²), and pilot system pressures of 6.4 MPa (65 kgf/cm²).

IMAGES PREVIEW

Hydraulic specialists will appreciate the detailed coverage of the dual-delivery swash plate axial plunger pumps, showing how ten plungers operate through alternating valve plate ports to supply two independent equal-capacity delivery circuits from a single cylinder block. Furthermore, the guide clarifies the auto boom-stop safety mechanism, giving exact voltage standards (3.5 ± 0.3 V for boom angle, 2.25 ± 0.3 V for swing angle) required when calibrating angle sensors with the Dr. EX diagnostic tool.

Professional Workshop Capability & Instant Digital Delivery

Whether you are performing routine maintenance standards, troubleshooting sluggish track travel, diagnosing electrical solenoid faults, or executing a full tear-down of the swing reduction gearbox, the Hitachi EX33Mu and EX58Mu Excavator Technical & Workshop Service Manual provides the accurate technical backing you need. Using OEM-grade specifications and functional system layouts ensures that every pressure relief adjustment, clearance measurement, and sensor calibration matches factory standards, preventing premature component wear and costly jobsite downtime.

Delivered as an instant PDF download, this digital manual provides instant access on your workshop laptop, rugged tablet, or smartphone without waiting for physical shipping. Keep digital copies on your mobile devices for rapid diagnostics on the jobsite, or print out high-resolution hydraulic schematics and wiring diagrams for hands-on bench repairs.