Part of the Hyundai Repair Manuals.
Looking for the Hyundai R80-7A shop manual PDF? All 420 pages cover your R80-7A Crawler Excavator, from pump device and main control valve teardowns to swing and travel drive rebuilds. Inside you get full hydraulic circuit schematics tracing main and pilot flow through single and combined operation, plus electrical wiring diagrams with connector pinouts and component specifications. A thick troubleshooting section walks hydraulic, electrical, and mechatronics faults step by step, backed by operational performance tests and maintenance standards for tracks and work equipment. Torque the swing motor mounting bolts to 29.7 kgf·m (215 lbf·ft) and check the coolant temp sender at 120 to 150 ohms before you swap parts on a hunch. Chasing an intermittent fault burns daylight fast. This bookmarked PDF opens on any device; search a spec by keyword, walk to the machine, and fix it.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-22 | 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 | 112-161 | Component Location, Electrical Circuit, Electrical Component Specification, Connectors |
| Mechatronics System | 162-184 | Outline, Mode Selection System, Travel Speed Control System, Automatic Warming Up Function, Engine Overheat Prevention Function, Anti-Restart System, Self-Diagnostic System |
| Maintenance Standard | 227-261 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 262-398 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 399-420 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| bypass relief valve opening pressure | 1.5kgf/cm2 | p. 83 |
| Resistance between CN-93(14) and chassis | MAX 1Ω | p. 213 |
| Resistance between CD-8(1,2) | 120~150Ω | p. 211 |
| Resistance between CN-93(16,28) | 0~1Ω | p. 211 |
| Swing motor mounting bolt | 29.7 ± 3.2 kgf·m (215 ± 23.1 lbf·ft) | p. 265 |
| Track roller mounting bolt | 29.7 ± 4.5 kgf·m (215 ± 32.5 lbf·ft) | p. 265 |
| Main pump mounting bolt | 12 ± 1.0 kgf·m (86.8 ± 7.2 lbf·ft) | p. 265 |
| Operating Weight | 7800 kg | p. 12 |
| Travel Speed (Low/High) | 3.3/4.6 km/hr | p. 12 |
| Swing Speed | 12.0 rpm | p. 19 |
| Engine Oil Quantity | 11.6 L | p. 18 |
| Main Pump Maximum Pressure | 280 kgf/cm2 | p. 18 |
