Part of the Hyundai Repair Manuals.
Hunting for a Hyundai R290LC-9, R290NLC-9 service manual PDF that actually matches your machine? This 643-page factory manual covers the standard excavators plus the Long Reach and High Walker variants. You get hydraulic schematics tracing main and pilot circuits through single and combined operations, electrical circuit diagrams with connector pinouts, and a self-diagnostic section that turns cluster fault codes into real answers. The back half is pure teardown: pump device, main control valve, swing and travel units, turning joint, cylinders, and undercarriage, each with its tightening torques. Set the main pumps to relieve at 350 kgf/cm2 (4980 psi), and if the swing feels loose, verify brake holding torque at 70 kgf·m (506 lbf·ft). A dead excavator doesn't wait for parts-counter opinions. Bookmarked and keyword-searchable; pull it up on your phone next to the machine and get back to digging.
What's Inside This Hyundai R290LC-9, R290NLC-9, R290LC-9 LONG REACH, R290LC-9 HIGH WALKER Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 12-52 | Safety Hints, Specifications |
| Structure and Function | 53-187 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Rcv Pedal |
| Hydraulic System | 188-219 | Hydraulic Circuit, Main Circuit, Pilot Circuit |
| Electrical System | 220-271 | Component Location, Electrical Circuit, Electrical Component Specification |
| Mechatronics System | 272-328 | Outline, Mode Selection System, Automatic Deceleration System |
| Maintenance Standard | 399-436 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 437-627 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 628-643 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| All Models | ||
| Braking torque | 70 kgf·m (506 lbf·ft) | p. 48 |
| Main pump maximum pressure | 350 kgf/cm² (4980 psi) | p. 47 |
| Main pump rated oil flow | 2 × 252 L/min (66.6 U.S. gpm / 55.4 U.K. gpm) | p. 47 |
| Tightening torque for G1/4 ports (includes orifice ports) | 3.5~3.9 kgf·m (25.3~28.2 lbf·ft) | p. 107 |
| Battery relay rated load | 24V 100A (continuity) 1000A (30seconds) | p. 241 |
| Swing motor mounting bolt | 58.4 ± 6.4 kgf·m (422 ± 46.3 lbf·ft) | p. 441 |
| 1" flare type pipe and hose torque | 21 kgf·m (151.9 lbf·ft) | p. 443 |
| Engine oil quantity | 24 L | p. 47 |
| R290LC-9 | ||
| Operating weight | 29300 kg | p. 23 |
| R290NLC-9 | ||
| Operating weight | 29100 kg | p. 24 |
| R290LC-9 LONG REACH | ||
| Operating weight | 32690 kg | p. 25 |
| R290LC-9 HIGH WALKER | ||
| Operating weight | 32140 kg | p. 26 |
Hyundai R290LC-9, R290NLC-9, R290LC-9 LONG REACH, R290LC-9 HIGH WALKER Common Problems This Manual Covers
Hyundai R290LC-9 hydraulic functions weak and slow, boom and arm speed drops once oil warms up
Check pilot pressure first, then flow-test the main pump against its rated 2 x 252 L/min shown on page 47. If flow is low, pull the pump and measure play between the piston and shoe caulking section; anything beyond the 0-0.1 mm limit on page 420 means the rotary group is worn, not the oil.
Manual Section: Maintenance Standard p. 420Travel drags on one side and swing feels sluggish after skipping hydraulic oil changes
Remove the MCV orifice filters and flush them; dust-packed screens starve the travel and swing circuits. Clean the filter cavities, fit new O-rings, and torque the G1/4 orifice ports to 3.5 to 3.9 kgf.m (25.3 to 28.2 lbf.ft) per page 107. Change the hydraulic oil and return filter while the system is open.
Manual Section: Structure and Function p. 107Hydraulic oil looks milky or foams in the tank, pump whines under load
Drain a sample from the tank; milky oil means water, foam means air pulled in on the suction side. Inspect suction line clamps and fittings, then retighten any 1 inch flare type pipe connections to 21 kgf.m (151.9 lbf.ft) as listed on page 443. Replace the oil and both filters before running the pump again.
Manual Section: Hydraulic and Mechanical System TroubleshootingEngine cranks slowly or clicks once, starting problems come back after replacing the battery
Test the battery relay before condemning the batteries; it is rated 24V 100A continuous and 1000A for 30 seconds, listed on page 241. Load-test both batteries, then clean and tighten the ground straps from frame to engine block. If the relay drops out under load, replace it and recheck every harness connector on that circuit.
Manual Section: Electrical System p. 241Upperstructure drifts on slopes and the swing brake will not hold the house steady
Measure swing drift with the brake applied; the swing motor braking torque spec is 70 kgf.m (506 lbf.ft) on page 48. If the brake slips, tear down the motor and inspect the brake springs and friction plates for wear. On reassembly, torque the swing motor mounting bolts to 58.4 kgf.m (422.4 lbf.ft) per page 488.
Manual Section: Disassembly and Assembly p. 488Frequently Asked Questions
What are the torque specifications for the main control valve mounting nuts on the Hyundai R290LC-9?
The torque specification for the main control valve mounting nut (Item 8) is 12.3 ± 1.3 kgf·m (89.0 ± 9.4 lbf·ft). p. 441
How do I clear error codes on a Hyundai R290LC-9 excavator?
You can delete logged faults of the MCU or engine ECM using the 'Delete logged fault' menu on the cluster. Navigate to the 'Management' menu, select 'Service menu', enter the password, and then select 'Delete logged fault' to clear the codes. p. 286
What are the replacement specifications for the hydraulic return filter?
The hydraulic oil return filter has a replacement interval of 1000 hours. This is listed in the 'Change or replace interval' table. p. 321
What is the engine oil capacity for the Hyundai R290LC-9?
The engine oil capacity for the Cummins QSB6.7 engine is 24 liters (6.3 U.S. gal). p. 47
What is the standard torque for the counterweight mounting bolts?
The standard torque for the counterweight mounting bolts (M36 × 3.0) is 308 ± 46 kgf·m (2228 ± 333 lbf·ft). p. 441
What format is this Hyundai R290 Series manual in?
You get a 643-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Am I able to print pages from this Hyundai R290 Series manual?
Zero restrictions. The PDF is DRM-free. Print whatever sections you need to take out to the shop. Standard letter or A4 paper works.
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