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Yanmar ViO45-6A ViO50-6A ViO55-6A Excavator Service Manual - 810 Pages PDF

Yanmar ViO45-6A ViO50-6A ViO55-6A Excavator Service Manual – 810 Pages PDF

Name: Yanmar ViO45-6A ViO50-6A ViO55-6A Excavator Service Manual - 810 Pages PDF
SKU: YAN-VIO45-6A-SM-001
Availability: InStock

Original price was: $44.95.Current price is: $26.95.

Complete 810-page YANMAR service manual for the ViO45-6A, ViO50-6A, and ViO55-6A compact excavators. Covers engine overhaul, hydraulic systems, electrical diagnostics, undercarriage service, and full wiring diagrams.

SKU: YAN-VIO45-6A-SM-001 Category: Heavy Equipment Service Manuals Tags: yanmar excavator service manual pdf, yanmar vio45-6a service manual, yanmar vio50-6a repair manual, yanmar vio55-6a workshop manual Vendor: Paver Manuals

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Description

Yanmar ViO45-6A, ViO50-6A, ViO55-6A Excavator Service Manual — Complete 810-Page Workshop Guide

This is the comprehensive YANMAR service manual for the ViO45-6A, ViO50-6A, and ViO55-6A compact excavators. Whether you are rebuilding the 4TNV88C-PBV or 4TNV86CT-PBV engine, diagnosing a hydraulic fault, servicing the undercarriage, or troubleshooting the electronic control system, this manual provides the procedures, specifications, and technical data required to complete the work correctly. The document spans 810 pages across eight primary chapters plus a full wiring diagram appendix.

File Details

Manual Type: Service Manual
Brand: YANMAR
Models Covered: ViO45-6A, ViO50-6A, ViO55-6A
Engines Covered: 4TNV88C-PBV, 4TNV86CT-PBV
Document Number: 172B04 0BKB3-EN0094
Language: English
Page Count: 810
File Format: PDF
Edition: 5th edition, 1st revision — January 2024

Chapters Covered

General Cautions for Maintenance Work — Correct work practices, safety precautions, preparations, disassembly and reassembly cautions, hydraulic equipment and piping removal/installation, seal handling, hydraulic hose installation and specifications, air release procedures
Technical Data — Specifications for ViO45-6A and ViO50-6A (without and with quick coupler), ViO55-6A, outline drawings and working areas, weight lists, lifting capacity lists, attachment specifications, periodic inspection and servicing schedules, recommended fuel/lube oil/grease, hydraulic circuit schematics, wiring diagrams
Service Standards — Machine performance, engine nominal and allowable values for both engine models, undercarriage specifications (rubber and steel crawlers), controls, hydraulic equipment including cylinders, implement specifications, tightening torque lists for machine and engine, general bolt and nut torque, hydraulic fitting torque, pressure adjustment procedures for relief valves, swing brake valve, and cut-off valve
Engine — Safety statements, engine service procedures, special service tools, measuring instruments, cylinder head components and service, valve clearance measurement and adjustment, crankshaft and camshaft components, EGR system, intake throttle, fuel system components and specifications, cooling system, lubrication system, turbocharger, starter motor, alternator, electronic control system, electric wiring precautions, failure diagnosis, compression pressure testing, troubleshooting quick reference
Electric System — Electrical equipment layout around engine, seat mount, P.T.O. 2, air conditioner, heater, cabin, work lamp, engine, work control, angle blade harness; LCD monitor and alarm systems; engine start and stop circuit; engine ECU; hydraulic ECU; error code list with detection conditions, causes, and corrective measures
Hydraulic System — Outline and component operation, circuit operation for boom, arm, bucket, swing, boom swing, blade, travel, non-deviation travel, simultaneous operations, hydraulic P.T.O., quick coupler, travel alarm, auto deceleration; hydraulic pump theory and service; control valve operation and disassembly/reassembly; pilot valve; swing motor; travel motor; proportional solenoid valves; solenoid valve for blade angling; pilot check valve; 2-way valve
Adjustment and Repair — Engine and electric equipment removal/reinstallation (engine, starter motor, radiator and oil cooler, fan belt, engine ECU, hydraulic ECU, DPF); undercarriage (crawler, travel motor, idler, track roller, carrier roller, floating seal installation); controls (mechanical linkage, travel levers, boom swing pedal, blade lever, lock lever); swing bearing; hydraulic equipment (hydraulic pump, control valve, pilot valves, swing motor, swivel joint, hydraulic cylinder, hydraulic oil tank, piping layout); work implements (bucket, arm, boom, blade, boom bracket, boom swing cylinder, quick coupler); cabin removal/reinstallation and disassembly/reassembly; air conditioner
Troubleshooting — Non-breakdown phenomena including natural release of bucket, discontinuous arm movement, drifting of upperstructure on quick travel, thermal shock of travel motor, elongation of boom swing cylinder, time lag on travel speed switching, fluctuation in oil level, quick coupler cylinder operation; quick reference tables for troubleshooting
Appendix — Wiring diagram for ViO45-6A, ViO50-6A, ViO55-6A

Each chapter includes detailed procedures with measurements, torque specifications, and service limits. The engine chapter alone spans hundreds of pages covering every component from cylinder head to turbocharger, including the electronic control system and DPF regeneration procedures. The hydraulic chapter breaks down every circuit operation — boom, arm, bucket, swing, boom swing, blade, travel, and combined functions — with component-level disassembly and reassembly instructions. The adjustment and repair chapter provides step-by-step removal and reinstallation procedures for all major assemblies, from engine and hydraulic pump to cabin and air conditioner.

What This Manual Enables You to Do

With this service manual, you can perform complete engine overhauls on both the 4TNV88C-PBV and 4TNV86CT-PBV engines, including cylinder head service, valve clearance adjustment, crankshaft and camshaft inspection, EGR system maintenance, turbocharger service, and electronic control system diagnostics. The fuel system section covers the common rail system, supply pump, injectors, and rail components with torque specifications and safety procedures for high-pressure fuel lines.

The hydraulic system chapter provides circuit-by-circuit operation explanations for every machine function, along with disassembly and reassembly procedures for the hydraulic pump, control valve, pilot valve, swing motor, and travel motor. You can diagnose hydraulic faults using the detailed flow diagrams and troubleshooting tables, and service components such as the anti-drift valve, relief valves, and proportional solenoid valves.

The undercarriage chapter covers rubber and steel crawler specifications, track tension adjustment, idler, track roller, and carrier roller disassembly and reassembly with floating seal installation procedures. The electrical system chapter includes the complete error code list for the engine ECU and hydraulic ECU, along with circuit descriptions for engine start/stop, auto deceleration, and eco mode. Service standards throughout the manual provide nominal values and allowable limits for engine components, hydraulic cylinders, undercarriage parts, and controls.

For the electronic-controlled engines, the manual explains how to work with the engine ECU, including precautions for handling connectors, minimum operating voltage requirements, and battery reverse connection warnings. The DPF regeneration procedures and EGR system maintenance are critical for emissions compliance and engine longevity. The manual also covers SMARTASSIST DIRECT (SA-D) diagnostic tool usage for fault diagnosis and component replacement.

Why This Manual Matters

The ViO45-6A, ViO50-6A, and ViO55-6A are precision-engineered compact excavators, and incorrect service procedures can lead to premature failure, reduced performance, or safety hazards. This manual gives you the exact specifications, procedures, and safety precautions that YANMAR engineers developed for these machines. From the correct valve clearance to the proper hydraulic hose installation technique, every detail is documented.

Complete PDF Bookmark Tree

Complete Bookmarks

The complete bookmarks in the “Yanmar ViO45-6A ViO50-6A ViO55-6A Excavator Service Manual – 810 Pages PDF” are as follows:

Coverp. 1

Spinep. 2

FOREWORDp. 3

CONTENTSp. 5

1. General Cautions for Maintenance Workp. 13

1-1 Correct Workp. 13

1-2 Safety Precautionsp. 13

1-3 Preparationsp. 13

1-4 Cautions for Disassembly and Reassemblyp. 13

1-5 Cautions for Removal and Installation of Hydraulic Equipmentp. 14

1-6 Cautions for Removal and Installation of Hydraulic Pipingp. 14

1-7 Cautions for Handling Sealsp. 15

1-8 Correct Installation of Hydraulic Hosep. 15

1-9 Specifications of Hydraulic Hosep. 18

1-10 Air Release of Hydraulic Equipmentp. 20

2. Technical Datap. 25

2-1 Specificationsp. 25

2-2 Outline Drawing and Working Areap. 41

2-3 Weight List of Main Partsp. 49

2-4 Lifting Capacity Listp. 53

2-5 Specifications for Attachmentp. 57

2-6 Periodic Inspection and Servicingp. 59

2-7 Fuel, Lube Oil and Grease Recommendedp. 61

2-8 Hydraulic Circuit Schematicp. 63

2-9 Wiring Diagramp. 67

3. Service Standardsp. 85

3-1 Machine Performancep. 85

3-2 Enginep. 89

3-2-1 Nominal and Allowable Valuesp. 89

3-3 Undercarriagep. 97

3-3-1 Rubber Crawler Specificationsp. 97

3-3-2 Steel Crawler Specificationsp. 98

3-3-3 Common Specifications of Steel & Rubber Crawlersp. 99

3-4 Controlsp. 101

3-5 Hydraulic Equipmentp. 103

3-5-1 Hydraulic Cylindersp. 103

3-6 Implementp. 105

3-6-1 Front Attachmentsp. 105

3-6-2 Blade Moving Devicep. 106

3-6-3 Bucket Teethp. 107

3-7 List of Tightening Torquep. 108

3-7-1 Machinep. 108

3-7-2 Enginep. 113

3-7-3 Tightening Torque for General Bolts and Nutsp. 116

3-7-4 Hydraulic Fittingp. 117

3-8 Pressure Adjustmentp. 118

3-8-1 Relief Valvesp. 118

3-8-2 Swing Brake Valvep. 121

3-8-3 Cut-Off Valvep. 122

4. Enginep. 127

4-1 Safetyp. 127

4-1-1 Safety Statementsp. 127

4-1-2 Safety Precautionsp. 128

4-2 Enginep. 141

4-2-1 Before You Begin Servicingp. 141

4-2-2 Introductionp. 142

4-2-3 Special Service Toolsp. 143

4-2-4 Measuring Instrumentsp. 146

4-2-5 Cylinder Headp. 148

4-2-6 Measuring and Adjusting Valve Clearancep. 163

4-2-7 Crankshaft and Camshaft Componentsp. 165

4-2-8 EGR Systemp. 191

4-2-9 Intake Throttlep. 198

4-3 Fuel Systemp. 199

4-3-1 Before You Begin Servicingp. 199

4-3-2 System Structurep. 200

4-3-3 Fuel System Specificationsp. 202

4-3-4 Fuel System Diagramp. 203

4-3-5 Fuel System Componentsp. 204

4-4 Cooling Systemp. 212

4-4-1 Before You Begin Servicingp. 212

4-4-2 Introductionp. 213

4-4-3 Cooling System Diagramp. 213

4-4-4 Engine Coolant Pump Componentsp. 214

4-4-5 Engine Coolant System Checkp. 215

4-4-6 Engine Coolant Pumpp. 215

4-5 Lubrication Systemp. 220

4-5-1 Before You Begin Servicingp. 220

4-5-2 Introductionp. 221

4-5-3 Lubrication System Diagramp. 221

4-5-4 Checking Engine Oil Pressurep. 222

4-5-5 Oil Pump Componentsp. 222

4-6 Turbochargerp. 226

4-6-1 Before You Begin Servicingp. 226

4-6-2 Introductionp. 226

4-6-3 Specificationsp. 226

4-6-4 Troubleshootingp. 227

4-6-5 Turbocharger Componentsp. 229

4-6-6 Turbocharger Component Functionsp. 230

4-6-7 Washing Procedurep. 232

4-6-8 Periodic Inspectionp. 233

4-7 Starter Motorp. 236

4-7-1 Before You Begin Servicingp. 236

4-7-2 Introductionp. 237

4-7-3 Starter Motor Specificationsp. 237

4-7-4 Starter Motor Troubleshootingp. 238

4-7-5 Starter Motor Componentsp. 239

4-7-6 Starter Motorp. 240

4-8 Alternatorp. 250

4-8-1 Before You Begin Servicingp. 250

4-8-2 Introductionp. 251

4-8-3 Alternator Specificationsp. 251

4-8-4 Alternator Troubleshootingp. 252

4-8-5 Alternator Componentsp. 253

4-8-6 Alternator Wiring Diagramp. 254

4-8-7 Alternator Standard Outputp. 255

4-8-8 Alternatorp. 256

4-9 Electronic Control Systemp. 261

4-9-1 Engines available with the electronic control systemp. 261

4-9-2 Before You Begin Servicingp. 261

4-9-3 System Structurep. 263

4-9-4 How to Remove and Reattach the Diesel Particulate Filter (DPF)p. 271

4-9-5 SF and DPF Maintenance Kitp. 281

4-9-6 Troubleshooting of Electronic Control Systemp. 282

4-9-7 Replacement of Componentsp. 285

4-9-8 Installation Position of Sensorsp. 289

4-10 Electric Wiringp. 298

4-10-1 Electric Wiring Precautionsp. 298

4-11 Failure Diagnosisp. 299

4-11-1 Special Service Toolsp. 299

4-11-2 Troubleshooting By Measuring Compression Pressurep. 300

4-12 Troubleshootingp. 303

4-12-1 Quick Reference Table for Troubleshootingp. 303

5. Electric Systemp. 311

5-1 Electric Equipment of Machinep. 311

5-1-1 Parts Layout of Electrical Equipmentp. 311

5-1-2 LCD Monitor and Alarm Systemsp. 324

5-2 Circuit Description of Engine Start and Stopp. 330

5-3 Engine ECU (engine controller)p. 333

5-3-1 Engine ECUp. 333

5-3-2 Circuit Description of Auto Deceleration Modep. 335

5-3-3 Circuit Description of Eco Modep. 336

5-3-4 Control Functionsp. 337

5-4 Hydraulic ECU (Controller)p. 338

5-5 Error Code Listp. 341

6. Hydraulic Systemp. 359

6-1 Outlinep. 359

6-1-1 Control Valve Operationp. 361

6-1-2 Additional Operation of Control Valvep. 362

6-2 Circuit Operationp. 363

6-2-1 Boomp. 363

6-2-2 Armp. 364

6-2-3 Bucketp. 365

6-2-4 Swingp. 366

6-2-5 Boom Swingp. 367

6-2-6 Bladep. 368

6-2-7 Travelp. 371

6-2-8 Non-Deviation Travel (with Boom, Arm or Boom Swing Operation)p. 372

6-2-9 Non-Deviation Travel (with Bucket Operation)p. 373

6-2-10 Simultaneous Operation of Boom Up and Arm Retractp. 374

6-2-11 Simultaneous Operation of Boom Up and Bucketp. 375

6-2-12 Simultaneous Operation of Boom Up and Swingp. 376

6-2-13 Simultaneous Operation of Arm and Bucketp. 377

6-2-14 Hydraulic P.T.O.p. 378

6-2-15 Quick Coupler (Quick coupler spec.)p. 379

6-2-16 Travel Alarmp. 380

6-2-17 Auto Decelerationp. 381

6-3 Hydraulic Pumpp. 383

6-4 Control Valvep. 421

6-5 Pilot Valvep. 492

6-6 Swing Motorp. 506

6-7 Travel motorp. 533

6-8 Proportional solenoid valvep. 584

6-8-1 Proportional Solenoid Valve for P.T.O. (Without Air Conditioner spec.)p. 584

6-8-2 Proportional Solenoid Valve for P.T.O. and Engine Speed Sensing (Air Conditioner spec.)p. 590

6-9 Solenoid Valve for Blade Angling Control (Angle blade spec. only)p. 596

6-10 Pilot Check Valve (For Quick Coupler Circuit)p. 602

6-11 2-way valvep. 610

7. Adjustment and Repairp. 615

7-1 Engine and Electric Equipmentp. 615

7-1-1 Removal and Reinstallation of Enginep. 615

7-1-2 Removal and Reinstallation of Starter Motorp. 628

7-1-3 Removal and Reinstallation of Radiator and Oil Coolerp. 630

7-1-4 Removal and Reinstallation of Fan Belt and Compressor Driving Beltp. 635

7-1-5 Removal and Reinstallation of Engine ECUp. 638

7-1-6 Removal and Reinstallation of Hydraulic ECU (Air conditioner spec.)p. 640

7-1-7 Removal and Reinstallation of Diesel Particulate Filter (DPF)p. 641

7-2 Undercarriagep. 645

7-2-1 Outlinep. 645

7-2-2 Main Partsp. 645

7-2-3 Points of Reassembly (Rubber Track)p. 646

7-2-4 Points of Reassembly (Steel Track)p. 647

7-2-5 Removal and Reinstallation of Crawlerp. 649

7-2-6 Removal and Reinstallation of Travel Motorp. 651

7-2-7 Disassembly and Reassembly of Idlerp. 653

7-2-8 Disassembly and Reassembly of Track Rollerp. 656

7-2-9 Disassembly and Reassembly of Carrier Rollerp. 659

7-2-10 Installation of Floating Sealp. 661

7-2-11 Drawings of Jigp. 662

7-3 Controlsp. 666

7-3-1 Mechanical Control Linkagep. 666

7-3-2 Adjustment of Travel Leversp. 668

7-3-3 Adjustment of Boom Swing Pedalp. 669

7-3-4 Adjustment of Blade Leverp. 669

7-3-5 Adjustment of Lock Leverp. 670

7-4 Swing Bearingp. 671

7-5 Hydraulic Equipmentp. 673

7-5-1 Removal and Reinstallation of Hydraulic Pumpp. 673

7-5-2 Removal and Reinstallation of Control Valvep. 675

7-5-3 Removal and Reinstallation of Pilot Valves (L and R)p. 679

7-5-4 Removal and Reinstallation of Swing Motorp. 681

7-5-5 Removal and Reinstallation of Swivel Jointp. 683

7-5-6 Disassembly and Reassembly of Swivel Jointp. 689

7-5-7 Disassembly and Reassembly of Hydraulic Cylinderp. 692

7-5-8 Removal and Reinstallation of Hydraulic Oil Tankp. 707

7-5-9 Piping Layoutp. 716

7-6 Work Implementsp. 725

7-6-1 Removal and Reinstallation of Work Implementsp. 725

7-6-2 Quick Couplerp. 735

7-7 Cabinp. 738

7-7-1 Removal and Reinstallation of Cabinp. 738

7-7-2 Disassembly and Reassembly of Cabinp. 742

7-8 Air Conditionerp. 774

7-8-1 Removal and Reinstallation of Air Conditionerp. 774

8. Troubleshootingp. 793

8-1 Non-Breakdownsp. 793

8-1-1 Natural Release of Bucketp. 793

8-1-2 Discontinuous Arm Movementp. 793

8-1-3 Drifting of Upperstructure on Quick Travel Operationp. 794

8-1-4 Thermal Shock of Travel Motorp. 795

8-1-5 Elongation of Boom Swing Cylinder on 68 degrees Swingp. 796

8-1-6 Time Lag on Travel Speed Switchingp. 797

8-1-7 Fluctuation in Oil Level of Hydraulic Oil Tank Due to Temperature Changep. 798

8-1-8 Operation of Quick Coupler Cylinder (for Quick Coupler Type)p. 799

8-2 Quick Reference Table for Troubleshootingp. 800

Colophonp. 805

APPENDIXp. 807

The tightening torque lists cover machine, engine, and hydraulic fittings, ensuring every fastener is torqued correctly. The service standards provide allowable limits for wear parts, helping you determine when replacement is necessary. The troubleshooting tables help you systematically diagnose faults without unnecessary disassembly.

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Yanmar ViO45-6A ViO50-6A ViO55-6A Excavator Service Manual – 810 Pages PDF

Description

Yanmar ViO45-6A, ViO50-6A, ViO55-6A Excavator Service Manual — Complete 810-Page Workshop Guide

File Details

Chapters Covered

What This Manual Enables You to Do

Why This Manual Matters

Complete Bookmarks

IMAGES PREVIEW

Instant PDF Delivery

Reviews

What Our Customers Say

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