Part of the Hyundai Repair Manuals.
Looking for a Hyundai R380LC-9 service manual PDF you can trust? This 537-page factory Service Manual covers the R380LC-9 hydraulic excavator, from the main pump and control valve to the swing and travel drives. Inside: full hydraulic schematics with pilot and main circuit routing, complete electrical wiring diagrams with connector pinouts, self-diagnostic error codes for the mechatronics system, and a step-by-step disassembly section that walks you through pump, swing device, and turning joint teardowns. It also carries mounting torques for the engine, undercarriage, and work equipment, plus operational performance tests to benchmark a tired machine. Set the pilot relief at 40 kgf/cm2 and confirm both 12V, 160Ah batteries hold charge before you chase electrical gremlins. Your excavator is down. Get the factory numbers, not forum guesses. Bookmarked by system; pull it up on your phone in the shop and get back to work.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 11-36 | Safety Hints, Specifications |
| Structure and Function | 37-120 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Rcv Pedal |
| Hydraulic System | 121-152 | Hydraulic Circuit, Main Circuit, Pilot Circuit |
| Electrical System | 153-204 | Component Location, Electrical Circuit, Connectors |
| Mechatronics System | 205-261 | Outline, Mode Selection System |
| Maintenance Standard | 330-367 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 368-522 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 523-537 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Battery | 2 x 12V x 160Ah | p. 33 |
| Starting motor | 24V-7.5 kW | p. 33 |
| Pilot relief valve setting pressure | 40 kgf/cm2 | p. 126 |
| Bypass relief valve opening pressure (full-flow filter) | 1.5 kgf/cm2 | p. 124 |
| Bypass check valve setting pressure (1) | 3.0 kgf/cm2 | p. 124 |
| Voltage | 20~25V | p. 159 |
| Starter | 24V 4.5kW | p. 179 |
| Solenoid valve | 15~25 Ohm | p. 176 |
| Eppr valve | 15~25 Ohm | p. 176 |
| System pressure regulator relief setting (Travel) | 360 ± 10 kgf/cm2 | p. 350 |
| Main pump play between piston & shoe caulking section | 0-0.1 mm | p. 351 |
| Main pump combined height of set plate & spherical bushing | 23.8 mm | p. 354 |
