Part of the Hyundai Repair Manuals.
This 617-page Hyundai R170W-7A Shop Manual PDF is aimed at one machine: your R170W-7A wheel excavator, from pump device to rear axle differential. You get full hydraulic schematics for the main circuit, pilot circuit, and combined operation, plus wiring diagrams with connector pinouts and component locations. Inside: mechatronics troubleshooting for the self-diagnostic system, step-by-step teardown procedures for the pump, main control valve, swing motor, travel motor, transmission, steering valve, and both axles, and mounting torque charts for every system. Set the pilot relief valve to 40 kgf/cm2, and check that the bypass check valve is set at 4.5 kgf/cm2 (64 psi) before you blame the pump. A wheel excavator earns nothing parked in the yard. Bookmarked with a full text layer; pull it up on your phone, jump to the section, and start wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-35 | Safety Hints, Specifications |
| Structure and Function | 36-124 | Pump Device, Main Control Valve, Swing Device, Travel Motor, Rcv Lever, Accelerator Pedal, Brake Pedal, Transmission |
| Hydraulic System | 125-177 | Hydraulic Circuit, Main Circuit, Pilot Circuit, Single Operation, Combined Operation |
| Electrical System | 178-232 | Component Location, Electrical Circuit, Electrical Component Specification, Connectors |
| Mechatronics System | 233-266 | Outline, Mode Selection System, Automatic Deceleration System, Power Boost System, Travel Speed Control System |
| Maintenance Standard | 315-343 | Operational Performance Test, Major Components, Track and Work Equipment |
| General Precautions and Tightening Torque | 344-350 | Removal Work, Installation Work, Tightening Torque Charts, Pipe and Hose Connections |
| Pump Device Disassembly and Assembly | 351-373 | Main Pump Removal, Main Pump Installation, Regulator Structure, Regulator Disassembly, Regulator Assembly |
| Main Control Valve Disassembly and Assembly | 374-387 | Main Control Valve Removal, Main Control Valve Installation, Spool Disassembly, Holding Valve, Relief Valve |
| Swing Device Disassembly and Assembly | 388-410 | Swing Motor Removal, Swing Motor Installation, Swing Motor Disassembly, Swing Motor Assembly, Reduction Gear Disassembly, Reduction Gear Assembly |
| Travel Motor Disassembly and Assembly | 411-434 | Travel Motor Removal, Travel Motor Installation, Motor Unit Structure, Regulator Structure, Counter-Balance Valve, Sealing the Drive Shaft |
| Steering Valve Disassembly and Assembly | 435-459 | Steering Valve Removal, Steering Valve Installation, Steering Valve Disassembly, Steering Valve Assembly, Tightening Torque |
| Front and Rear Axle Disassembly and Assembly | 460-554 | Front Axle Removal, Rear Axle Removal, Differential Disassembly, Differential Assembly, Input Flange, Pivot Bearing |
| Work Equipment Disassembly and Assembly | 555-601 | Rcv Lever Disassembly, Rcv Lever Assembly, Bucket Cylinder, Arm Cylinder, Boom Cylinder, Dozer Cylinder |
| Component Mounting Torque | 602-617 | Introduction Guide, Engine System, Electric System, Power Train System, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Bypass check valve setting pressure | 4.5kgf/cm2 (64psi) | p. 128 |
| Bypass relief valve opening pressure | 1.5kgf/cm2 (21psi) | p. 128 |
| Voltage | 10~12.5V | p. 184 |
| Battery | 12V 80Ah | p. 201 |
| Starter | 24V 5.0kW | p. 206 |
| Fuel filter element interval | 500hr | p. 263 |
| Drain filter cartridge interval | 250hr | p. 263 |
| CAN communication resistance | 120 Ω | p. 293 |
| Starter motor voltage | 20~30V | p. 300 |
| Turning joint seal set - Slipper ring | 1.5mm (0.059in) narrower than seal groove | p. 341 |
| Turning joint seal set - Worn limit | 0.5mm (0.02in) ~ 1.5mm (0.059in) | p. 341 |
