Hyundai R290LC-3 Excavator Service Manual 2004–2007 OEM (P/N 2-1 through 2-62)

This 476-page original OEM publication (OEM P/N not specified, form number 2-1 through 2-62) delivers the exact factory data required for the 2004–2007 Hyundai R290LC-3, ROBEX 290-3, and ROBEX 290NLC-3 crawler excavators, including bucket, arm, and undercarriage variants.

• Supplied as a PDF, this manual provides exact operational performance test procedures—including track revolution speed and swing bearing play evaluations—allowing mechanics to bypass expensive dealer diagnostics.
• Includes component tear-down instructions for the turning joint, RCV lever, RCV pedal, prolix switch, pilot pump, swing reduction gear, and gear pump.
• Covers maintenance standards for track rollers, carrier rollers, idlers, recoil springs, boom cylinders, arm cylinders, and bucket cylinders.

System Documentation & Tear-Down Reference

This 2004–2007 edition remains the definitive factory reference for the R290LC-3 build series to execute any heavy-duty repair. It meticulously documents engine tuning, hydraulic circuit logic, and swing device assembly parameters. You will find over 80 system diagrams, specifically featuring wiring diagrams, electrical circuit schematics, hydraulic circuit schemas, working range charts, operational performance test charts, component location views, and cross-section component views.

Chapters break down the function and structure of key machine systems. The mechatronics section heavily details the CAPO system, monitoring system, and EPPR valve operation, while maintenance pages define standard performance benchmarks for tracks and work equipment. By providing step-by-step disassembly and assembly instructions for overhauling the main control valve, travel motors, turning joint, and cylinder assemblies, shops can keep high-ticket rebuilds in-house rather than outsourcing to expensive dealerships. Always verify system pressure relief procedures and battery explosion prevention steps in the safety section before breaking loose high-pressure hydraulic lines or servicing the electrical system. Detailed troubleshooting flow charts correlate specific operational lags or faults directly with their mechanical or electrical roots.

Specification and Reference Data

Expect extensive unit conversion tables, SAE J1097 lifting capacities, and bucket selection guides categorized by material density. The technical sections lay out precise engine parameters for the CUMMINS 6CT8.3-C (8270 cc displacement), covering firing order, piston displacement, and fuel consumption metrics.

Critical hydraulic reference data is included for pumps and relief valves:

• Main pump rated oil flow: 2 x 260 L/min.
• Swing motor relief pressure: 240 kg/cm².