Part of the Hyundai Repair Manuals.
Need the factory answers for your Hyundai R55-9 crawler excavator? This 412-page Hyundai R55-9 service manual PDF walks you through the pump device, main control valve, swing and travel drives, and RCV lever from teardown to final torque. Inside: full hydraulic circuit schematics covering pilot, single, and combined operation, complete wiring diagrams with connector pinouts, and a heavy troubleshooting section for both hydraulic and electrical faults. You also get maintenance standards with operational performance tests and wear limits for the track and work equipment. Tighten the P1 pump port fittings to 6.0~7.0 kgf·m, and check solenoid valve resistance against the 15-25 Ohm spec before you condemn a coil. No more chasing pilot pressure faults with borrowed numbers. Bookmarked with a live text layer; search any spec, jump to any section, and pull it up on the tablet next to the machine.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-23 | Safety Hints, Specifications |
| Structure and Function | 24-80 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever |
| Hydraulic System | 81-114 | Hydraulic Circuit, Main Circuit, Pilot Circuit, Single Operation, Combined Operation |
| Electrical System | 115-170 | Component Location, Monitoring System, Electrical Circuit |
| Troubleshooting | 171-209 | Before Troubleshooting, Hydraulic and Mechanical System, Electrical System Troubleshooting |
| Maintenance Standard | 210-247 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 248-401 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 402-412 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Tightening torque for P1, P2, P3, A1-A10, B1-B10, B11 ports | 6.0~7.0 kgf·m | p. 33 |
| Tightening torque for T1, T2 ports | 10~12 kgf·m | p. 33 |
| Maximum allowable viscosity | 1000 mm²/s | p. 30 |
| Minimum allowable viscosity | 10 mm²/s | p. 30 |
| Solenoid valve resistance | 15-25 Ohm | p. 148 |
| Travel solenoid resistance | 15-25 Ω | p. 204 |
| Axial clearance between coupling gear and cover | 0.3 ± 0.1 mm | p. 235 |
| Hydraulic tank quantity | 70 L | p. 255 |
| Operating Weight | 5650 kg | p. 13 |
| Travel Speed (low/high) | 2.2/4.0 km/hr | p. 13 |
| Engine Rated Gross Horse Power | 57.8 Hp | p. 20 |
| Main Pump Maximum Pressure | 220 kgf/cm2 | p. 20 |
