Hyundai HX235A LCR 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. Electric circuit
3. Electrical component specification
4. Connectors
MECHATRONICS SYSTEM
1. Outline
2. Mode selection system
3. Automatic deceleration system
4. Power boost system
5. Travel speed control system
6. Automatic warming up function
7. Engine overheat prevention function
8. Variable power control system
9. Attachment flow control system
10. Boom floating control system
11. Intelligent power control system
12. Anti-restart system
13. Self-diagnostic system
14. Engine control system
15. EPPR valve
16. Monitoring system
17. Fuel warmer system
18.
2D MG+ system
TROUBLESHOOTING
1. Before troubleshooting
2. Hydraulic and mechanical system
3. Electrical system
4. Mechatronics 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 valver
5. Swing device
6. Travel device
7. RCV lever
8. Turning joint
9. Boom, arm, bucket and dozer cylinders
10. Undercarriage
11. 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.