Part of the Hyundai Repair Manuals.
All 424 pages of this Hyundai R80-7, Robex 80-7 shop manual PDF focus on one machine: your Robex 80-7 hydraulic excavator, from pump device to undercarriage. You get full electrical circuit diagrams with connector pinouts, hydraulic schematics tracing the main and pilot circuits through single and combined operation, and step-by-step disassembly and assembly for the pump, main control valve, swing device, travel device, and turning joint. Troubleshooting charts walk you through hydraulic, electrical, and mechatronics faults, with the self-diagnostic codes decoded. Set the main relief valve to 280 kgf/cm2 (3,983 PSI) and fill the hydraulic system to 130L before running your performance tests. No more chasing wiring faults with a multimeter and a prayer. Bookmarked and keyword-searchable; jump straight to the spec, then get back on the machine.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-22 | Safety Hints, Specifications |
| Structure and Function | 23-80 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Rcv Pedal |
| Hydraulic System | 81-111 | Hydraulic Circuit, Main Circuit, Pilot Circuit, Single Operation, Combined Operation |
| Electrical System | 112-159 | Component Location, Electrical Circuit, Electrical Component Specification, Connectors |
| Mechatronics System | 160-186 | Outline, Mode Selection System, Travel Speed Control System, Automatic Warming Up Function, Engine Overheat Prevention Function |
| Maintenance Standard | 232-265 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 266-402 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 403-424 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic tank capacity | 75L (19.8 U.S. gal) | p. 21 |
| Hydraulic system capacity | 130L (34.3 U.S. gal) | p. 21 |
| Main relief valve pressure | 280kgf/cm2 (3983psi) | p. 19 |
| Overload relief valve pressure | 310kgf/cm2 (4410psi) | p. 19 |
| Tightening torque for G1/4 ports | 2.5~3 kgf·m (18.1~21.7 lbf·ft) | p. 31 |
| Tightening torque for G1/2 ports | 6~7 kgf·m (43.4~50.6 lbf·ft) | p. 31 |
| Secondary pressure | 5 to 20.5 kgf/cm2 | p. 68 |
| Bypass relief valve opening pressure | 1.5kgf/cm2 (21psi) | p. 83 |
| Pilot relief valve setting pressure | 35kgf/cm2 | p. 85 |
| Piston assembly and cylinder block clearance (D-d) | ≤ 0.060mm | p. 251 |
| Piston shoe and piston axial play | ≤ 0.2mm | p. 251 |
| 1/4" Pipe and hose torque | 3 kgf·m | p. 271 |
