Part of the Hyundai Repair Manuals.
Wrenching on a Hyundai R55-3? This 456-page Robex 55-3 Service Manual PDF walks you through the whole excavator, from hydraulic pump and main control valve function to full disassembly of the swing motor, travel motor, and turning joint. You get complete electrical circuit diagrams, cluster connector pinouts, and a hydraulic circuit diagram that shows exactly where every line runs. Inside: operational performance tests, hydraulic pressure adjusting procedures, and troubleshooting sections for both the electrical system and hydraulic components. Set the main relief valve at 210 kgf/cm2 (2987 psi), then check swing motor braking torque against the 11.5 kgf-m (83 lbf-ft) standard. No more chasing a dead cluster with a test light and a hunch. Bookmarked and keyword-searchable; pull it up on your phone next to the machine and go straight to the spec you need.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-20 | Safety Hints, Specifications |
| Structure and Function | 21-78 | Hydraulic Circuit Diagram, Hydraulic Pump, Main Control Valve, Travel Device, Swing Machinery |
| Testing and Adjusting | 79-105 | Operational Performance Test, Testing and Adjusting Hydraulic Pressure |
| Component Location | 106-108 | Hour Meter, Starting Switch, Fuse Box, Cluster, Battery Relay, Horn, Head Lamp |
| Electrical Circuit Diagrams | 109-114 | Circuit Diagram A-1, Circuit Diagram A-2, Circuit Diagram A-3, Circuit Diagram B-1, Circuit Diagram B-2, Circuit Diagram B-3 |
| Electrical Circuit Operation | 115-128 | Power Circuit, Starting Circuit, Charging Circuit, Head and Work Lamp Circuit, Beacon Lamp Circuit, Wiper and Washer Circuit, Monitoring Circuit |
| Monitoring System | 129-140 | Monitor Panel Outline, Cluster Check Procedure, Warning Lamps, Gauge Operation |
| Yanmar Engine Manual, Safety and General (Embedded) | 141-190 | Safety Warnings for Electrical Parts and Battery, Waste Treatment, Precautions for Service Work, Preparation Before Disassembly, Precautions in Disassembly, Inspection and Measurement, Reassembly, Adjustment and Check |
| Yanmar Engine Manual, Engine Body (Embedded) | 191-235 | Cylinder Block Honing and Cross Hatch, Boring and Honing Intervals, Piston Pin Bushing Replacement, Valve Guide Replacement, Oil Seal Replacement |
| Yanmar Engine Manual, Turbocharger 4TNE105T (Embedded) | 236-250 | Waste Gate Valve Opening Pressure and Lift Check, Test Equipment Setup |
| Yanmar Engine Manual, Starting Motor (Embedded) | 251-285 | No-Load Characteristic Test, Current, Voltage and Revolution Measurement, 30-Second Rating Caution |
| Yanmar Engine Manual, Alternator (Embedded) | 286-305 | Alternator Service Standards, Output and Regulator Checks |
| Yanmar Engine Manual, Service Standards (Embedded) | 306-325 | Cylinder Bore and Roundness for 4TNE94 / 4TNE98 / 4TNE106, Crankshaft Pin and Journal Limits, Idle Gear Shaft and Bushing, Gear Backlash, Thrust Bearing Side Gap |
| Trouble Shooting | 321-349 | Electrical System Troubleshooting, Hydraulic Components Troubleshooting |
| Maintenance Standard | 350-364 | Major Components Maintenance, Track and Work Equipment Maintenance |
| Disassembly and Assembly | 365-456 | Hydraulic Pump Disassembly, Main Control Valve Disassembly, Swing Motor Disassembly, Travel Motor Disassembly, Remote Control Valve Disassembly, Turning Joint Disassembly |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Maximum torque at 1600rpm | 19.4kgf·m (140lbf·ft) | p. 16 |
| Braking torque (Swing motor) | 11.5kgf·m (83lbf·ft) | p. 17 |
| Battery | 1 × 12V × 100Ah | p. 16 |
| Main relief valve pressure | 210kgf/cm² (2987psi) | p. 17 |
| Overload relief valve pressure | 230kgf/cm² (3271psi) | p. 17 |
| Battery voltage | 10~12.5V | p. 115 |
| Voltage | 10~12.5V | p. 125 |
| Radiator cap tester pressure | 0.9±0.15 kgf/cm² | p. 169 |
| Fan belt tension | 10-15 mm | p. 170 |
| Operating weight | 5400 kg | p. 11 |
| Travel speed (Low/high) | 2.2/4.0 km/hr | p. 11 |
| Engine oil quantity | 9.7 L | p. 17 |
