Need factory-level service data for the Kobelco SK08 Mini Excavator? This 344-page Kobelco SK08 shop manual PDF (OEM #S5PT0009E01) delivers the complete shop-level reference, from engine disassembly to hydraulic system pressure adjustment. You get a hydraulic circuit schematic with full fluid routing and circuit operation detail, a wiring diagram for the complete electrical system, exploded views of the engine and all hydraulic equipment assemblies, and a dedicated troubleshooting section with symptom-based diagnosis for both mechanical and hydraulic faults. Packed with tightening torque tables organized by machine, engine, and hydraulic hose joint type. Travel motor hex socket bolts torque to 44.1 to 58.9 N·m; seat the suction filter fitting to 98.1 to 117.7 N·m. Your machine is down. Get the factory answer. One-click download, bookmarked and keyword-searchable, ready on any device you bring to the shop.
What's Inside This Kobelco SK08 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 11-24 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 25-38 | 2-1 Specifications, 2-2 Outline Drawing and Working Area, 2-3 Weight List of Main Parts, 2-4 Lifting Capacity List |
| Service Standards | 39-60 | Machine Performance, Engine, Undercarriage (Rubber Crawler Specifications), Controls, Hydraulic Equipment (Hydraulic Cylinders) |
| Engine | 61-104 | Disassembly of Engine (Removing: Nozzle and Glow Plug, Cylinder Head Cover, Oil Pipe, Water Pump Assembly, Rocker Arm and Push Rods, Exhaust Manifold, Cylinder Head, Tappets, Injection Pump Assembly, Crankshaft Pulley, Timing Gear Case Assembly, Idle Gear and Oil Pump Assembly, Camshaft Assembly, Suction Filter and Pipe, Connecting Rods and Pistons, Crankshaft Assembly) |
| Hydraulic System | 105-138 | 5-1 Outline, 5-2 Hydraulic Circuit Schematic, 5-3 Circuit Operation, 5-4 Pressure Adjustment |
| Hydraulic Equipment | 139-226 | 6-1 Hydraulic Pump, 6-2 Control Valve, 6-3 Swing Motor, 6-4 Travel Motor |
| Adjustment and Repair | 227-302 | 7-1 Electrical Equipment of Machine, 7-2 Undercarriage, 7-3 Controls, 7-4 Swing Bearing, 7-5 Hydraulic Equipment, 7-6 ROPS Bar, 7-7 Work Implements |
| Periodic Inspection and Servicing | 303-306 | 8-1 List of Periodic Inspection and Servicing |
| Fuel, Lube Oil and Grease Recommended | 307-310 | 9-1 List of Fuel, Lube Oil and Grease Recommended |
| Troubleshooting | 311-342 | 10-1 Non-Breakdowns, 10-2 Troubleshooting |
| Reference Data | 343-344 | 11-1 Dimensions and Specifications for Attachment |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Track roller tightening torque | 57.9 to 72.4 ft·lbf (78.5 to 98.1 N·m) | p. 53 |
| Travel motor installation bolt tightening torque | 32.5 to 43.4 ft·lbf (44.1 to 58.9 N·m) | p. 54 |
| Suction filter tightening torque | 72.4 to 86.8 ft·lbf (98.1 to 117.7 N·m) | p. 54 |
| Stop Solenoid Terminal mounting nut tightening torque | 0.7 to 1.1 ft·lbf (1.0 to 1.5 N·m) | p. 100 |
| Starter motor Nominal output / Weight | 1.2 kW / 5.8 lbs. (2.65 kg) | p. 93 |
| Starter motor No load Speed | More than 2800 rpm | p. 93 |
| Engine Rated Output / Engine Speed | 10.3 HP (7.7 kW) / 2400 rpm | p. 29 |
| Hydraulic Pump Maximum Allowable Pressure | 2625 PSI (18.1 MPa) | p. 26 |
| Control Valve System Relief Set Pressure | 2625 PSI (18.1 MPa) | p. 27 |
| Engine Compression Pressure | 420.6 PSI (2.9 MPa) at 300 rpm | p. 30 |
| Hydraulic Oil Tank Capacity | 2.83 Gals. (10.7 L) | p. 28 |
| Cylinder Head Bolt Tightening Torque | 25.1 to 28.8 ft•lbf (34 to 39 N•m) | p. 56 |
Kobelco SK08 Common Problems This Manual Covers
Kobelco SK08 engine cranks but won't start, starter motor spins with no combustion
Check the start relay connector and wiring harness before condemning the starter. Inspect for corroded pins or loose terminals at the relay socket. Trace the full start circuit on the wiring diagram. If voltage reaches the solenoid but the engine still won't fire, torque the stop solenoid terminal nut to 0.7 to 1.1 ft·lbf (1.0 to 1.5 N·m) per page 100.
Manual Section: Electrical Equipment of MachineEngine cranks slowly or fails to start in cold weather, even with a fully charged battery p. 100
Test each glow plug for continuity before chasing battery or fuel problems. Replace any open-circuit plug and torque the new unit to 5.9 to 11.1 ft·lbf (8 to 15 N·m) per page 100. Once plugs check out, verify compression reaches 420.6 PSI (2.9 MPa) at 300 rpm per page 30. A cylinder reading significantly below spec points to worn rings or a failed head gasket.
Manual Section: EngineBoom or arm drifts downward after controls are released and levers return to neutral p. 139
Inspect the control valve spool for wear or contamination that prevents full seating. Verify system relief pressure holds at 2625 PSI (18.1 MPa) per page 27; anything lower accelerates cylinder drift. Pull the hydraulic schematic on page 110 to confirm pilot signal integrity through the circuit. Clean or replace the affected spool per control valve procedures in the Hydraulic Equipment section starting at page 139.
Manual Section: Control Valve TroubleshootingMachine pulls left or right during travel, one track noticeably slower than the other p. 54
Test travel speed on flat ground; spec is 40.0 seconds over 65.6 ft (20 m) per page 40. Time each track separately to isolate the slow side. Inspect the slow-side travel motor for case drain leakage indicating internal bypass loss. If reinstalling the motor, torque the installation bolts to 32.5 to 43.4 ft·lbf (44.1 to 58.9 N·m) per page 54.
Manual Section: Travel Motor TroubleshootingWork implements move sluggishly under load, bucket stalls or bogs down in firm ground p. 105
Check hydraulic oil level first; tank capacity is 2.83 Gals. (10.7 L) per page 28. Inspect the 10-micron return filter for blockage. A clogged filter starves pump flow well before the pressure gauge reacts. Measure system pressure with a calibrated gauge; maximum allowable is 2625 PSI (18.1 MPa) per page 26. If pressure reads low with a clean filter and correct oil level, inspect the suction strainer for cavitation.
Manual Section: Hydraulic SystemEngine overheats during normal digging operation, temperature gauge climbs into the warning zone p. 315
Remove and pressure-test the radiator cap; it should hold 12.79 PSI (88.2 kPa) before venting per page 31. A weak cap drops coolant prematurely and triggers false overheating. Inspect coolant level, clear mud packed into radiator fins, and check fan belt tension. If temperature spikes persist after cooling system service, work through the engine overheating flowchart in the troubleshooting procedures at page 315.
Manual Section: Engine Troubleshooting (General)Frequently Asked Questions
What do Kobelco SK08 error codes mean?
The manual does not provide a list of specific numerical or alphanumeric error codes. Instead, it describes alarm lamps for critical engine conditions. The Engine oil alarm lamp, Water temp. alarm lamp, and Battery charge alarm lamp indicate issues such as low engine oil pressure (below 5.69 to 8.53 PSI), engine overheating (water temp. above 224.6 to 235.4°F), or battery charging problems. A buzzer sounds when any of these lamps illuminate while the engine is running.
How do you fix kobelco SK08 engine cranks but won't start, starter motor spins with no combustion?
Check the start relay connector and wiring harness before condemning the starter. Inspect for corroded pins or loose terminals at the relay socket. Trace the full start circuit on the wiring diagram. If voltage reaches the solenoid but the engine still won't fire, torque the stop solenoid terminal nut to 0.7 to 1.1 ft·lbf (1.0 to 1.5 N·m) per page 100.
How do you fix engine cranks slowly or fails to start in cold weather, even with a fully charged battery?
Test each glow plug for continuity before chasing battery or fuel problems. Replace any open-circuit plug and torque the new unit to 5.9 to 11.1 ft·lbf (8 to 15 N·m) per page 100. Once plugs check out, verify compression reaches 420.6 PSI (2.9 MPa) at 300 rpm per page 30. A cylinder reading significantly below spec points to worn rings or a failed head gasket.
How do you fix boom or arm drifts downward after controls are released and levers return to neutral?
Inspect the control valve spool for wear or contamination that prevents full seating. Verify system relief pressure holds at 2625 PSI (18.1 MPa) per page 27; anything lower accelerates cylinder drift. Pull the hydraulic schematic on page 110 to confirm pilot signal integrity through the circuit. Clean or replace the affected spool per control valve procedures in the Hydraulic Equipment section starting at page 139.
How will I receive this Kobelco SK08 Shop Manual?
This is a 344-page searchable PDF ready for immediate download. Works on any device, so pull it up on your phone while you're under the hood. No shipping, no waiting.
Am I able to print pages from this manual?
Yes. The PDF has no DRM restrictions, so print any page or section you need for your shop. Works with any standard printer.
Can I find wiring schematics in this Kobelco SK08 manual?
Yes, full electrical schematics are included with wire colors, connector locations, and circuit descriptions.
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