Part of the Hyundai Repair Manuals.
This 490-page Hyundai R210NLC-7A Service Manual PDF covers the crawler excavator from pump device to undercarriage, straight from the factory. You get full hydraulic schematics tracing main and pilot circuits through single and combined operation, wiring diagrams with connector pinouts and component locations, and a mechatronics section that decodes the self-diagnostic system, power boost, and auto-deceleration logic. Inside: a complete disassembly and assembly section for the pump, main control valve, swing and travel devices, plus mounting torque tables for every system on the machine. Set the pilot relief valve to 35 kgf/cm2, and check that drain oil pressure stays under 1.5 kgf/cm2 (21 psi) before you condemn a motor. Chasing a swing fault with forum guesses gets expensive fast. Bookmarked with a full text layer; jump to any section or search any spec right from the tablet in your cab.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 12-40 | Safety Hints, Specifications |
| Structure and Function | 41-120 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Rcv Pedal |
| Hydraulic System | 121-152 | Hydraulic Circuit, Main Circuit, Pilot Circuit, Single Operation, Combined Operation |
| Electrical System | 153-201 | Component Location, Electrical Circuit, Electrical Component Specification, Connectors |
| Mechatronics System | 202-231 | Outline, Mode Selection System, Automatic Deceleration System, Power Boost System, Travel Speed Control System, Automatic Warming Up Function, Engine Overheat Prevention Function |
| Maintenance Standard | 282-316 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 317-475 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 476-490 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Battery | 2 x 12V x 100Ah | p. 36 |
| Starting motor | Nippon denso (24V-4.5kW) | p. 36 |
| Bypass relief valve opening pressure | 1.5kgf/cm2 (21psi) | p. 124 |
| Pilot relief valve setting pressure | 35kgf/cm2 | p. 128 |
| Drain oil pressure limit | 1.5kgf/cm2 (21psi) | p. 125 |
| Battery voltage | 12V X 2 | p. 155 |
| Starter | 24V 4.5kW | p. 178 |
| Carrier roller mounting bolt, nut | 29.7 ± 4.4 kgf·m | p. 322 |
| Track roller mounting bolt | 54.7 ± 5.0 kgf·m | p. 322 |
| Tightening torque for piston assembly to rod assembly | 100 ± 10.0 kgf·m (723 ± 72.3 lbf·ft) | p. 458 |
| Tightening torque for lock nut (20) - Bucket | 200 ± 20 kgf·m (1447 ± 145 lbf·ft) | p. 458 |
| Operating Weight | 22000 kg | p. 22 |
