Part of the Hyundai Repair Manuals.
Every one of the 405 pages in this Hyundai R55-7A, Robex Shop Manual PDF is aimed at one machine: your R55-7A crawler excavator. Inside: complete hydraulic circuit diagrams tracing the main and pilot circuits through single and combined operation, electrical schematics with connector pinouts and component locations, and a full troubleshooting section for both hydraulic and electrical faults. You also get step-by-step disassembly and assembly procedures for the pump device, main control valve, swing device, travel device, and turning joint, backed by mounting torque tables for the entire machine. Torque the main pump mounting bolts to 12.8 kgf·m, set the pilot relief valve at 30 kgf/cm², and change the hydraulic filter every 500 hours like the factory intended. No more chasing hydraulic faults with a gauge and a hunch. Bookmarked and keyword-searchable; pull it up on your phone at the machine and get wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 3-23 | Safety Hints, Specifications |
| Structure and Function | 24-73 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever |
| Hydraulic System | 74-104 | Hydraulic Circuit, Main Circuit, Pilot Circuit, Single Operation, Combined Operation |
| Electrical System | 105-154 | Component Location, Monitoring System, Electrical Circuit, Electrical Component Specification, Connectors |
| Troubleshooting | 155-193 | Before Troubleshooting, Hydraulic and Mechanical System |
| Maintenance Standard | 194-231 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 232-386 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 387-405 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic oil filter filtration accuracy | 10 μm or less | p. 29 |
| Hydraulic oil filter replacement interval | 500 hours | p. 30 |
| Main pump mounting bolt | 12.8±3.0 kgf·m | p. 235 |
| Carrier roller mounting bolt, nut | 41±5.0 kgf·m | p. 235 |
| Track roller mounting bolt | 41±5.0 kgf·m | p. 235 |
| Boom cylinder gland tightening torque | 95 ± 9.5 kgf·m | p. 392 |
| Boom cylinder lock nut tightening torque | 292 ± 29 kgf·m | p. 392 |
| Main pump housing tightening torque | 12.0 ± 1.0 kgf·m | p. 391 |
| Operating weight | 5700 kg | p. 12 |
| Travel speed (Low/High) | 2.2/4.1 km/hr | p. 12 |
| Engine oil quantity | 11.6 L | p. 19 |
| Main pump maximum pressure | 220 kgf/cm2 | p. 19 |
