Komatsu PC45MR-5 & PC55MR-5 Compact Hydraulic Excavator Shop Manual PDF Download

Description

Komatsu PC45MR-5 & PC55MR-5 Shop Manual

This is the complete official workshop service and repair manual for the Komatsu PC45MR-5 and PC55MR-5 compact hydraulic excavators. This comprehensive manual provides all the technical information needed for effective servicing, repair, and maintenance of these machines. It is an essential resource for professional mechanics, technicians, and owners who demand accurate and detailed information straight from the manufacturer.

Models & Equipment Covered

This manual is applicable to the following models:

• PC45MR-5 – Serial Numbers: 30001 and up
• PC55MR-5 – Serial Numbers: 20001 and up

It covers both canopy and cab specifications, as well as rubber and steel shoe options where applicable.

Main Systems & Subjects Included

This comprehensive shop manual is organized into sections that cover every major system of the excavator. Key areas include:

• Engine System: Detailed coverage of the Komatsu 4D88E-7 diesel engine, including the Common Rail Injection (CRI) system, engine control, auto-deceleration, and overheating prevention.
• Hydraulic System: In-depth information on the Closed-center Load Sensing System (CLSS), main pump, control valve, hydraulic tank, and all hydraulic circuits for work equipment, travel, swing, and blade.
• Powertrain & Undercarriage: Coverage of the travel and swing motors, final drives, swing circle, track assemblies, idlers, and rollers.
• Electrical System: Comprehensive wiring diagrams for canopy and cab specifications, machine monitor operation, KOMTRAX system, and troubleshooting of electronic components.
• Work Equipment: Detailed procedures for the boom, arm, bucket, blade, and boom swing systems, including cylinder disassembly and assembly.
• Air Conditioner System: A full appendix on the air conditioning system, including component specifications, refrigeration cycle, and troubleshooting.

Key Coverage & Procedures

This manual enables a wide range of professional repair and maintenance tasks, including:

• Step-by-Step Disassembly & Assembly: Detailed instructions for removing and installing major components such as the engine, main pump, travel motor, swing motor, and cylinders.
• Testing & Adjusting: Comprehensive procedures for testing engine speed, oil pressure, track tension, hydraulic pressures, and adjusting valves, pumps, and travel deviation.
• Troubleshooting: Extensive troubleshooting guides for electrical, hydraulic, and mechanical systems, including failure code tables and symptom-based diagnostic flows.
• Maintenance Standards: Complete tables with standard values, clearances, and repair limits for all major components.
• Hydraulic & Electrical Circuit Diagrams: Full-color schematics for accurate system tracing and diagnostics.

Why This Manual Is Useful

This shop manual is an indispensable tool for performing precise repairs, preventing costly downtime, and ensuring the longevity of your excavator. Whether you are diagnosing a complex electrical fault, rebuilding a hydraulic component, or performing routine maintenance, the information in this manual is the definitive reference for your PC45MR-5 or PC55MR-5.

Instant PDF Download
Once your payment is confirmed, you will receive immediate access to the complete shop manual in PDF format. This digital download is compatible with all your devices, allowing you to view the manual on a computer, tablet, or smartphone anywhere you work.