Part of the Hyundai Repair Manuals.
Looking for the Hyundai R140W-7 service manual PDF? You just found all 638 pages of factory workshop coverage for the R140W-7 wheeled excavator, straight from Hyundai. Inside: full electrical wiring circuits, hydraulic schematics with main and pilot circuit routing, self-diagnostic error codes for the mechatronics system, and step-by-step disassembly and assembly for the main pump, swing motor, travel motor, transmission, and steering valve. You also get operational performance tests plus tightening torque charts for every bolt on the machine. Set the pilot relief valve at 40 kgf/cm2, and check solenoid valve resistance at 15 to 25 ohms before you condemn a coil. Chasing an electrical fault through a harness with no diagram is a wasted afternoon. This PDF is bookmarked by section and text-searchable; pull it up on your tablet, walk to the machine, and start wrenching.
What's Inside This Hyundai R140W-7 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-38 | Safety Hints, Specifications |
| Structure and Function | 39-120 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Accelerator Pedal, Brake Pedal, Transmission |
| Hydraulic System | 121-153 | Main Circuit, Pilot Circuit, Combined Operation |
| Electrical System | 154-205 | Component Location, Electrical Circuit, Electrical Component Specification |
| Mechatronics System | 206-244 | Mode Selection System, Automatic Deceleration System, Engine Control System |
| Maintenance Standard | 303-331 | Operational Performance Test, Major Components, Track and Work Equipment |
| Precautions and Tightening Torque | 332-338 | Removal Work, Installation Work, Completing Work, Tightening Torque Chart |
| Pump Device | 339-361 | Removal and Install, Main Pump Structure, Regulator Structure, Disassembly and Assembly, Inspection |
| Main Control Valve | 362-375 | Removal and Install, Main Control Valve Structure, Disassembly and Assembly, Inspection, Relief Valve |
| Swing Device | 376-390 | Removal and Install, Swing Motor Structure, Disassembly and Assembly, Inspection, Brake Assembly |
| Reduction Gear | 391-400 | Removal and Install, Reduction Gear Structure, Disassembly and Assembly |
| Travel Motor | 401-440 | Motor Unit Structure, Control Unit Structure, Counter-Balance Valve, Disassembly and Assembly, Inspection |
| Steering Valve and Final Drive | 441-478 | Final Drive Disassembly, Steering Valve Structure, Steering Valve Disassembly and Assembly, Steering Cylinder |
| Cylinders and Work Equipment | 479-622 | Turning Joint, Boom Cylinder, Arm Cylinder, Bucket Cylinder, Dozer Cylinder, Outrigger Cylinder, Bucket Assembly |
| Component Mounting Torque | 623-638 | Introduction Guide, Engine System, Electric System, Power Train System, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Bypass check valve (1) setting pressure | 5.0kgf/cm2 (71psi) | p. 124 |
| Bypass check valve (2) setting pressure | 3.0kgf/cm2 (43psi) | p. 124 |
| Solenoid valve resistance | 15~25 ohm | p. 177 |
| Transducer (Pump 1,2) 0bar voltage | 1V | p. 182 |
| Transducer (Pump 1,2) 500bar voltage | 5V | p. 182 |
| Engine Rated Horsepower | 115 Hp | p. 34 |
| Main Pump Maximum Pressure | 330 kgf/cm2 | p. 34 |
| Swing Motor Relief Pressure | 240 kgf/cm2 | p. 35 |
| Travel Motor Relief Pressure | 360 kgf/cm2 | p. 35 |
| Engine Oil Capacity | 15.3 L | p. 34 |
| Hydraulic Tank Capacity | 124 L | p. 38 |
| Fuel Tank Capacity | 270 L | p. 38 |
