![Hyundai RC215C-7 Repair Manual [Crawler Excavator]](https://youfixthis.com/wp-content/uploads/2016/02/2016-02-16_11-07-01-1-300x300.jpg)
Part of the Hyundai Repair Manuals.
All 424 pages of this Hyundai R80-7, Robex 80-7 shop manual PDF focus on one machine: your Robex 80-7 hydraulic excavator, from pump device to undercarriage. You get full electrical circuit diagrams with connector pinouts, hydraulic schematics tracing the main and pilot circuits through single and combined operation, and step-by-step disassembly and assembly for the pump, main control valve, swing device, travel device, and turning joint. Troubleshooting charts walk you through hydraulic, electrical, and mechatronics faults, with the self-diagnostic codes decoded. Set the main relief valve to 280 kgf/cm2 (3,983 PSI) and fill the hydraulic system to 130L before running your performance tests. No more chasing wiring faults with a multimeter and a prayer. Bookmarked and keyword-searchable; jump straight to the spec, then get back on the machine.
What's Inside This Hyundai R80-7, ROBEX 80-7 Manual
| System | Pages | Key Topics |
|---|---|---|
| General | 1-22 | Safety Hints, Specifications |
| Structure and Function | 23-80 | Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Rcv Pedal |
| Hydraulic System | 81-111 | Hydraulic Circuit, Main Circuit, Pilot Circuit, Single Operation, Combined Operation |
| Electrical System | 112-159 | Component Location, Electrical Circuit, Electrical Component Specification, Connectors |
| Mechatronics System | 160-186 | Outline, Mode Selection System, Travel Speed Control System, Automatic Warming Up Function, Engine Overheat Prevention Function |
| Maintenance Standard | 232-265 | Operational Performance Test, Major Components, Track and Work Equipment |
| Disassembly and Assembly | 266-402 | Precaution, Tightening Torque, Pump Device, Main Control Valve, Swing Device, Travel Device, Rcv Lever, Turning Joint |
| Component Mounting Torque | 403-424 | Introduction Guide, Engine System, Electric System, Undercarriage, Structure, Work Equipment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic tank capacity | 75L (19.8 U.S. gal) | p. 21 |
| Hydraulic system capacity | 130L (34.3 U.S. gal) | p. 21 |
| Main relief valve pressure | 280kgf/cm2 (3983psi) | p. 19 |
| Overload relief valve pressure | 310kgf/cm2 (4410psi) | p. 19 |
| Tightening torque for G1/4 ports | 2.5~3 kgf·m (18.1~21.7 lbf·ft) | p. 31 |
| Tightening torque for G1/2 ports | 6~7 kgf·m (43.4~50.6 lbf·ft) | p. 31 |
| Secondary pressure | 5 to 20.5 kgf/cm2 | p. 68 |
| Bypass relief valve opening pressure | 1.5kgf/cm2 (21psi) | p. 83 |
| Pilot relief valve setting pressure | 35kgf/cm2 | p. 85 |
| Piston assembly and cylinder block clearance (D-d) | ≤ 0.060mm | p. 251 |
| Piston shoe and piston axial play | ≤ 0.2mm | p. 251 |
| 1/4" Pipe and hose torque | 3 kgf·m | p. 271 |
Hyundai R80-7, ROBEX 80-7 Common Problems This Manual Covers
Hyundai R80-7 hydraulic functions weak, boom and bucket slow under load, dig force gone
Test main relief pressure at the pump test port. Boom, arm, and bucket relief should read 310±10 kgf/cm2 and travel 280±10 kgf/cm2 per the pressure table on page 250. Adjust or replace the main relief valve, then torque the cartridge to the value in the disassembly and assembly torque chart on page 301.
Manual Section: Maintenance Standard p. 250Boom or arm drifts down with controls in neutral, load creeps during trench work
Swap the overload relief valves between the boom and arm circuits to see if the drift follows the valve; torque them to the chart value on page 301 during reinstall. If the drift stays put, the cylinder piston seals are bypassing: rebuild the cylinder with a seal kit and retest.
Manual Section: Disassembly and Assembly p. 301Hydraulic oil overheats after an hour of digging, pump whines and power fades
Check hydraulic tank level first; the tank holds 75 L (19.8 U.S. gal) and the full system takes 130 L. Drain a sample: if the oil is cloudy or dark, change it and confirm viscosity stays within the recommended range in the General specifications. Then work the overheating chart in the troubleshooting procedures starting.
Manual Section: Hydraulic and Mechanical System Troubleshooting p. 21Joysticks respond slowly or functions cut out intermittently, worse when oil is cold
Tee a gauge into the pilot line and check the pilot relief setting: it should hold 35 kgf/cm2, spec on page 85. Verify RCV lever secondary pressure falls between 5 and 20.5 kgf/cm2 through full stroke (page 68). Low readings point to a clogged pilot filter or weak pilot relief valve; clean or replace and retest.
Manual Section: Hydraulic System p. 85Hydraulic hoses weep at fittings after replacement, drips return within a day
Back off the leaking fitting, inspect the O-ring face for nicks, and retorque to the port and hose values in the torque chart (G1/4 ports 2.5~3 kgf·m, G1/2 ports 6~7 kgf·m, page 31). Do not overtighten to stop a leak; a crushed seal weeps worse. Replace any fitting that still leaks at correct torque.
Manual Section: Disassembly and Assembly p. 271Frequently Asked Questions
How do I reset the recorded error codes on the Hyundai R80-7?
To delete all recorded error codes, select the recorded error (TIME Er) display on the cluster. Press the engine and select switch at the same time for 2 seconds or more. The cluster display will change to TIME Er : 00, indicating that the CPU controller has deleted all recorded error codes from its memory. p. 167
What is the torque specification for the track roller mounting bolts on the Hyundai R80-7?
The tightening torque for the track roller mounting bolts (M14 x 2.0) is 19.6 ± 2.5 kgf·m (142 ± 18 lbf·ft). p. 269
What is the tightening torque for the main pump mounting bolts on the Hyundai R80-7?
The tightening torque for the main pump mounting bolts (M12 x 1.75) is 12 ± 1.0 kgf·m (86.8 ± 7.2 lbf·ft). p. 269
What is the standard engine speed for the H mode on the Hyundai R80-7?
The standard engine speed for the H mode is 2200 ± 50 rpm. p. 162
What is the hydraulic oil capacity for the R80-7 hydraulic tank?
The hydraulic tank capacity is 75 liters (19.8 U.S. gal). p. 21
Will this Hyundai R80-7 Shop Manual download right away?
You download the Shop Manual yourself: 424 pages, searchable PDF, available immediately. Keep a copy on every device you use.
Is this Hyundai R80-7 Shop Manual printable?
You can. The PDF is unlocked and carries no copy protection, so print the sections you want and keep the file as your backup.
Reviews
There are no reviews yet.