Part of the Hyundai Repair Manuals.
Wrenching on a Hyundai R290LC-3, R290NLC-3, or R290-3? This 475-page service manual PDF covers the whole crawler excavator family, from the pump device and main control valve to the swing and travel drives. Inside: hydraulic circuit schematics with main and pilot routing, electrical wiring diagrams with component locations, exploded views of the major assemblies, and a full troubleshooting section for chasing faults system by system. You also get complete disassembly and assembly procedures plus operational performance tests for judging component wear before you tear anything down. The twin main pumps run 140 cc/rev each and peak at 320 kg/cm2 (4550 psi); fill the hydraulic system to 380 L, with 270 L in the tank. Your excavator earns nothing parked. Bookmarked chapters and a keyword-searchable text layer mean you find the spec, grab the wrench, and get back on the sticks.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 9-37 | Safety, Specifications |
| Structure and Function | 38-116 | Pump Device, Main Control Valve, Swing Device, Travel Device |
| Hydraulic System | 117-145 | Hydraulic Circuit, Main Circuit, Pilot Circuit |
| Electrical System | 146-204 | Component Location, Electrical Circuit, Power Circuit |
| Mechatronics System | 205-222 | Operation of Capo System, Engine Control System |
| Maintenance Standard | 283-322 | Operational Performance Test, Major Component |
| Disassembly and Assembly | 323-475 | Precautions, Pump Device, Main Control Valve, Swing Device, Travel Device, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic tank capacity | 270 L (71.3 U.S. gal) | p. 37 |
| Hydraulic system capacity | 380 L (100.3 U.S. gal) | p. 37 |
| Pilot pump maximum pressure | 40 kg/cm2 (570 psi) | p. 32 |
| Main pump capacity | 2 x 140 cc/rev | p. 31 |
| Main pump maximum pressure | 320 kg/cm2 (4550 psi) | p. 31 |
| Secondary pressure | 5 to 19 kgf/cm² | p. 104 |
| Relief valve pressure | 40kg/cm2 | p. 121 |
| RCV Lever push rod wear limit | 1 mm | p. 313 |
| Swing bearing upper part mounting bolt | 97.8±10 kgf·m (707.4±72.3 lbf·ft) | p. 326 |
| Swing bearing lower part mounting bolt | 97.8±10 kgf·m (707.4±72.3 lbf·ft) | p. 326 |
| Carrier roller mounting bolt | 21.0±2.3 kgf·m (151.9±16.6 lbf·ft) | p. 326 |
| Track roller mounting bolt | 54.7±6.0 kgf·m (395.6±43.4 lbf·ft) | p. 326 |
