Part of the Hyundai Repair Manuals.
Put the factory in your toolbox: this Hyundai Robex 22-7 Service Manual PDF packs 120 pages of crawler excavator service data into one download. Inside: a full troubleshooting section for the travelling, slewing, boom, and swing systems, plus performance test procedures for the main pump. You also get disassembly and assembly steps for the control valve, slew and travel motors, hydraulic cylinders, swivel joint, and the complete crawler undercarriage (idlers, sprockets, track rollers, spring case). Real numbers, too. The hydraulic system holds 33 liters total; set the overload relief valve to 11.8 MPa and keep oil temperature inside the -20°C to 120°C window. Tired of translating forum guesses into torque wrench settings? Bookmarked and text-searchable, this PDF opens on your phone, tablet, or laptop, so walk it out to the machine and start wrenching.
What's Inside This Manual
| System | Pages | Key Topics |
|---|---|---|
| Precautions on Maintenance | 6 | Correct Operation, Precautions on Operation, Safety Check, Preparation, Disassembly, Assembly |
| Outline | 7-24 | Location of Serial No, Name of Each Part, Dimensions and Specification, Weight List, Oil and Grease Supply Points, List of Supply Oil and Grease, When to Repair |
| Attachment | 25-32 | Standard of Maintenance, Inspection and Adjustment, Natural Fall of Attachment, Speed of Attachment Cylinder |
| Engine | 33-36 | Specification, Performance Curve, Location of Serial Number, Standard Engine Speed |
| Main Pump | 37-44 | Specification, Structure, Removing and Installing the Pump, Performance Test of the Hydraulic Pump |
| Hydraulic Oil Filter | 45-50 | Installation, Line Filter, Suction Filter, Pilot Filter, Maintenance Procedure |
| Control Valve | 51-58 | Specification, Disassembly and Assembly, Structure of the Relief Valve, Precautions for Handling |
| Joystick | 59-61 | Pilot Valve Specification, Single- and Double-Operating Torque, Secondary Pressure, Port Plate and Structure |
| Slew Motor | 62-67 | Specification, Structure, Standard of Maintenance of the Slew Bearing and Slew Case, Measuring Natural and Over-Slew Distance, Measuring Slewing Time |
| Travel Motor | 68-73 | Specification, Structure, Operation, Handling, Inspection, Adjustment |
| Hydraulic Cylinder | 74-79 | Structure, Disassembly Procedure, Disassembling Inner Parts, Assembly and Inspection Procedure, Precautions for Assembly |
| Swivel Joint | 80-83 | Specification and Structure, Disassembly and Assembly |
| Crawler | 84-91 | Structure, Operation, Standard of Maintenance, Disassembly, Assembly, Handling |
| Spring Case and Grease Cylinder | 92-95 | Structure, Specification of Spring, Disassembling and Assembling the Adjust Cylinder, Disassembling and Assembling the Grease Cylinder |
| Idler | 96-97 | Standard of Maintenance, Idler Tooth Width, Minor Diameter and Tooth Count, Lubricating Oil Grade and Quantity, Pad or Replace Wear Limits |
| Sprocket | 98-101 | Removing the Sprocket, Installing the Sprocket, Standard of Maintenance and Wear Limits |
| Track Roller | 102-103 | Standard of Maintenance, Roller Outer Diameter (Projected Part and Tread), Overall and Tread Width Limits, Mounting Bolt Tightening Torque, Lubricating Oil Quantity |
| Electrical Equipment | 104-107 | Electric Circuit Diagram, Starter System, Alternator System |
| Troubleshooting | 108-120 | Travelling System, Slewing System, Boom System, Swing System |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic tank capacity | 33 L | p. 14 |
| Weight | 15kg | p. 38 |
| Oil temperature | -20°C to 120°C | p. 47 |
| Total amount of hydraulic oil | 33 L | p. 49 |
| Overload relief set pressure | 11.8MPa | p. 63 |
| Tightening torque for M10x60 bolt | 80Nm | p. 65 |
| Tightening torque for M12x40 bolt | 130Nm | p. 65 |
| Working pressure | 18.6 MPa | p. 69 |
| Glow timer | 3 seconds | p. 104 |
| Engine Rated Output | 12.5 kW | p. 11 |
| Hydraulic Oil Capacity | 33.0 L | p. 11 |
| Fuel Capacity | 29.0 L | p. 11 |
