Part of the Hyundai Repair Manuals.
All 600 pages of this Hyundai R450LC-7 Shop Manual PDF cover one machine: the R450LC-7 hydraulic excavator, from pump device and main control valve to swing drive, turning joint, and travel motors. You get complete hydraulic circuit schematics for the main and pilot circuits, single and combined operation, plus electrical wiring diagrams with component locations and connector pinouts. Inside: self-diagnostic error codes, a full troubleshooting section for hydraulic, electrical, and mechatronics faults, and page after page of disassembly and assembly procedures backed by mounting torque tables. Set boom, arm, and bucket relief pressure to 390±10 kgf/cm2, then torque the engine mounting bolts to 46.4 kgf·m. Your excavator earns nothing parked. Get the factory numbers, not forum guesses. Bookmarked with a real text layer; type any spec, jump straight to it, and get back to work.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-28 | Safety Hints, Specifications |
| Structure and Function | 29-137 | Pump Device, Main Control Valve |
| Hydraulic System | 138-177 | Hydraulic Circuit, Main Circuit, Pilot Circuit, Single Operation, Combined Operation |
| Electrical System | 178-225 | Component Location, Electrical Circuit, Electrical Component Specification, Connectors |
| Mechatronics System | 226-264 | Mode Selection System, Automatic Deceleration System, Power Boost System, Travel Speed Control System, Self-Diagnostic System, Engine Control System |
| Troubleshooting | 265-314 | Before Troubleshooting, Hydraulic and Mechanical System, Electrical System, Mechatronics System |
| Maintenance Standard | 315-352 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 353-575 | Pump Device, Main Control Valve, Swing Device, Travel Device, Turning Joint, Boom Arm and Bucket Cylinder |
| Component Mounting Torque | 576-600 | Engine System, Electric System, Hydraulic System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Relief valve | 33kgf/cm2 | p. 144 |
| bypass relief valve | 1.5kgf/cm2 | p. 142 |
| Maximum allowable pressure (Boom, Arm, Bucket) | 390±10 kgf/cm2 | p. 337 |
| Engine mounting bolt, nut | 46.4 ± 4.6 kgf·m | p. 358 |
| Radiator mounting bolt | 29.7 ± 4.5 kgf·m | p. 358 |
| Operating Weight | 44900 kg | p. 11 |
| Travel Speed (Low/High) | 3.2/5.3 km/hr | p. 11 |
| Swing Speed | 10.3 rpm | p. 25 |
| Engine Oil Quantity | 37.85 L | p. 24 |
| Battery | 2 x 12V x 160Ah | p. 24 |
| Main Pump Rated Oil Flow | 2 x 380 L/min | p. 24 |
| Hydraulic Tank Capacity | 250 L | p. 360 |
