Document number S5RO0002E NA on the cover marks this as the maker's own factory book: the 331-page Kobelco SK024, SK027, SK032 shop manual PDF for all three compact hydraulic excavators. Hydraulic schematics trace oil from the pump through the control valve's main relief, port relief and anti-cavitation valves, and wiring diagrams map the electrical circuits that feed the solenoid valves. Travel motors get separate disassembly chapters, since the 027 runs a different unit than the 024 and 032, and troubleshooting fills roughly the last sixth of the book, sorted by overall machine, travel, slewing and boom faults. Check boom and arm pressure on the 024 against 200 kgf/cm², and keep engine oil at or below the 4.7 L upper limit on the pan. Out on site with a stalled machine, you have no one to ask. Bookmarked and text-searchable, the PDF travels on your laptop or tablet to wherever the excavator is parked.
What's Inside This Manual
| System | Pages | Key Topics |
|---|
| General | 14-27 | General Precautions, Precautions for Disassembly and Assembly, Precautions for Removing and Installing Hydraulic Units |
| Specifications | 28-81 | Specification Diagrams, Lifting Capacities, Specification Tables |
| Machine Configuration | 82-140 | Drive System, Slew System, Travel System, Upper Frame |
| Hydraulic Pump | 141-154 | Pump Construction, Pump Operation, Disassembly and Assembly, Inspecting and Adjusting, Troubleshooting |
| Control Valve | 155-174 | Valve Construction, Main Relief Valve, Port Relief Valve, Anti-Cavitation Valve, Solenoid Valve, Troubleshooting |
| Cylinder | 175-198 | Boom Cylinder, Arm Cylinder, Bucket Cylinder, Dozer Blade Cylinder, Swing Cylinder, Disassembly and Assembly |
| Travel Motor (SK024, SK032) | 199-226 | Reduction Gear, Counterbalance Valve, 2-Speed Control Valve, Disassembly and Assembly, Inspecting and Adjusting |
| Travel Motor (SK027) | 227-244 | Hydraulic Motor, Reduction Gear, Counterbalance Valve, 2-Speed Control Valve, Disassembly and Assembly |
| Slew Motor | 245-268 | Hydraulic Motor, Reduction Gear, Brake Valve, Disassembly and Assembly, Inspecting and Adjusting |
| Swivel Joint | 269-278 | Swivel Joint Construction, Disassembly and Assembly, Inspecting and Adjusting, Troubleshooting |
| Troubleshooting | 279-331 | Overall Machine, Machine Travel, Slewing, Boom |
Quick Reference Specifications
| Specification | Value | Page |
|---|
| Hydraulic Hose Fittings Union Nut (PF) 1/8 Torque | 1.0 ± 0.5 kgf-m (7.3 ± 3.5 ft-lb) | p. 24 |
| Hydraulic Hose Fittings Union Nut (PF) 1/4 Torque | 2.5 ± 0.5 kgf-m (18.1 ± 3.5 ft-lb) | p. 24 |
| Boom Hydraulic Oil Pressure | 200 kgf/cm² | p. 72 |
| Arm Hydraulic Oil Pressure | 200 kgf/cm² | p. 72 |
| Engine Oil Pan Upper Limit | 4.7L | p. 55 |
| Engine Oil Pan Lower Limit | 2.9L | p. 72 |
| Bore (dimension A) replacement limit | 37.49 mm | p. 151 |
| Shaft diameter | 17.968 mm | p. 152 |
| Overall Displacement 1st gear (SK024) | 798 cc/rev. | p. 202 |
| Overall Displacement 2nd gear (SK024) | 420 cc/rev. | p. 202 |
| Hydraulic Hose Fitting Union Nut (PF) 1/8 Torque | 1.0 ± 0.5 kgf-m | p. 24 |
| Hydraulic Hose Fitting Taper Threads (PT) 1/8 Torque | 1.2 ± 0.12 kgf-m | p. 24 |
