Hyundai R25Z-9A Crawler Excavator Service Repair Manual

Table of Contents

FOREWORD
GENERAL
1. Safety hints
2. Specifications
STRUCTURE AND FUNCTION
1. Pump device
2. Main control valve
3. Swing device
4. Travel device
5. RCV Lever
6. RCV Pedal
HYDRAULIC SYSTEM
1. Hydraulic circuit
2. Main circuit
3. Pilot circuit
4. Single operation
5. Combined operation
ELECTRICAL SYSTEM
1. Component location
2. Monitoring system
3. Electrical circuit
4. Electrical component specification
5. Connectors
TROUBLESHOOTING
1. Before troubleshooting
2. Hydraulic and mechanical system
3. Electrical system
MAINTENANCE STANDARD
1. Operational performance test
2. Major components
3. Track and work equipment
DISASSEMBLY AND ASSEMBLY
1. Precaution
2. Tightening torque
3. Pump device
4. Main control valve
5. Swing device
6. Travel device
7. RCV lever
8. Turning joint
9. Boom, arm and bucket cylinder
10. Undercarriage
11. Work equipment
COMPONENT MOUNTING TORQUE
1. Introduction guide
2. Engine system
3. Electric system
4. Hydraulic system
5. Undercarriage
6. Structure
7. Work equipment

This manual has been prepared as an aid to improve the quality of repairs by giving the serviceman an accurate understanding of the product and by showing him the correct way to perform repairs and make judgements. Make sure you understand the contents of this manual and use it to full effect at every opportunity.
This manual mainly contains the necessary technical information for operations performed in a service workshop.