Hyundai R130LC-3 Crawler Excavator Master Service Manual (1995-1998) – 476 Pages | Factory Grade

Hyundai R130LC-3 Service Manual - 1996 Edition

This professional service manual provides authoritative technical guidance for the maintenance and repair of the Robex 130 series crawler excavators. It integrates a vital unique maintenance insight regarding the CAPO (Computer Aided Power Optimization) system, specifically the EPPR valve adjustment, which requires a precise electrical current range of 270–400mA to ensure optimal hydraulic pump delivery and machine uptime. Technical personnel can utilize this documentation to perform comprehensive system diagnostics, structural analysis, and precision component overhauls.

Technical Applicability & Machine Configurations

Standard Crawler Configurations

• Robex 130LC-3: Standard long crawler chassis with 600 mm (24") triple grouser shoes.
• Robex 130LC-3 (Option): Configured with 500 mm (20") or 710 mm (28") shoe variants.

Low Ground Pressure (LGP) / Swamp Configurations

• Robex 130LCM-3: Specialized high-clearance undercarriage with 960 mm (38") triple grouser shoes for marshy terrain.

Technical Series Designations

• Robex Series (Series 3): All Dash-3 technical variants utilizing the Cummins 4BTA3.9 engine and CAPO mechatronics system.
• Serial Number Breakpoints: Specific technical data applies to Swing Motor units up to #1904 and #1905-up, as well as Travel Motor units up to #1563 and #1564-up.

Operational Parameters & Service ROI

• Hydraulic Precision: Detailed relief valve settings, including a standard main relief pressure of 320 kgf/cm² (4550 psi) and a power boost limit of 350 kgf/cm² (4980 psi).
• Structural Integrity: Verbatim torque specifications for critical joints, such as the 140.0 ± 15 kgf·m requirement for counterweight mounting bolts.
• Component Lifecycle: Established wear limits and clearance standards, such as the 0.028–0.056 mm piston-to-cylinder bore clearance for the main pump.

Document Metadata

• Manufacturer: Hyundai Heavy Industries Co., Ltd.
• Document Type: Full Service/Workshop Manual
• Total Pagination: 476 Pages
• Technical Standards: Based on SAE J1097 lifting capacities.

Calibration Data & Factory Benchmarks

Engine performance is benchmarked against the Cummins 4BTA3.9 4-cycle turbocharged diesel engine, producing 111 HP at 2200 rpm. The mechatronics section provides specific EPPR valve pilot pressure ranges of 4–15 kgf/cm² (58–220 psi) for precise flow regulation. Maintenance standards include swing bearing play limits, where the maximum allowable wear is capped at 8.0 mm to prevent structural failure.

Hydraulic Schematics & Visual Aids

System architecture is illustrated through detailed multi-view cutaways and circuit diagrams covering:

• Main Pump Assembly: Variable displacement tandem axial piston pump with gear pump integration.
• Control Valve Spools: 7-spool hydraulic pilot system architecture.
• Travel & Swing Circuits: Automatic spring-applied, hydraulic-released braking systems.

Table of Contents

• Section 1: General (Safety Hints, Specifications)
• Section 2: Structure and Function (Pump Device, Main Control Valve, Swing Device, Travel Device, RCV Lever/Pedal)
• Section 3: Hydraulic System (Hydraulic Circuit, Main/Pilot Circuits, Single/Combined Operation)
• Section 4: Electrical System (Component Location, Electrical Circuit, Monitoring System, Electrical Components)
• Section 5: Mechatronics System (CAPO System, Engine Control, EPPR Valve)
• Section 6: Troubleshooting (Hydraulic, Mechanical, and Electrical troubleshooting)
• Section 7: Maintenance Standard (Operational Performance Tests, Component Wear Limits)
• Section 8: Disassembly and Assembly (Tightening Torques, Removal/Installation Procedures)

Operational Limits & Fluid Specifications

• Engine Lubrication: 11 Liters (2.9 U.S. gal)
• Hydraulic System Capacity: 150 Liters
• Coolant Temperature Limits: Overheat warning at 110°C; Warming up lamp active below 30°C.
• Gradeability: 40 degrees (84%)
• Travel Speed: Low 3.2 km/hr / High 5.2 km/hr
• Torque Sequence: Sprocket mounting bolts (M16) must be torqued to 23.0 ± 2.5 kgf·m.

FAQ

Does this manual cover both the standard and high-clearance versions of the Robex 130 series? Yes, the documentation is applicable to the R130LC-3 and the R130LCM-3 (swamp version). It details specific differences in the undercarriage, such as the 960 mm (38") triple grouser shoes utilized on the LCM-3 configuration compared to the standard 600 mm (24") shoes found on the LC-3 model.

What is the factory-specified main relief valve pressure for the R130LC-3 hydraulic system? The manual specifies a standard main relief pressure of 320 kgf/cm² (4,550 psi). When the power boost function is engaged via the CAPO system, this pressure limit is increased to 350 kgf/cm² (4,980 psi) to provide temporary additional digging force.

Are detailed electrical and mechatronic schematics included for troubleshooting the CAPO system? The manual provides exhaustive coverage of the Computer Aided Power Optimization (CAPO) system within Section 5. It includes specific wiring diagrams and logic for the Prolix switch, which allows operators to bypass the CPU in an emergency by sending a constant electric current to the EPPR valve to maintain hydraulic pump delivery.

How is the swing motor brake system serviced according to the maintenance standards? Maintenance procedures in Section 2 and Section 8 describe a spring-applied, hydraulic-released disc brake system. Technicians must ensure that the brake release pressure is correctly calibrated, as the system is designed to automatically engage the swing park brake whenever the RCV pilot levers are in the neutral position.

What are the benefits of using this digital service manual for urgent field repairs? The digital format provides instant access to critical high-resolution diagrams, such as the 7-spool main control valve layout or the Cummins 4BTA3.9 engine torque sequences. Users can immediately navigate to Section 6 for hydraulic and mechanical troubleshooting or print specific pages like the 140.0 ± 15 kgf·m counterweight mounting bolt torque specs for use directly at the machine.