Want the real factory data for your Kobelco SK25SR-6? This 564-page shop manual PDF (OEM #S5PV0029E01) covers the SK25SR-6 Mini Excavator from engine rebuild to final drive: every hydraulic circuit, electrical schematic, and factory procedure in one document. You get complete hydraulic circuit schematics tracing fluid through the control valve, swing motor, and travel motor, plus full wiring diagrams with the automatic deceleration circuit and error code list. The Service Standards section delivers a torque table covering machine bolts, engine hardware, and hydraulic fittings. Verify the return filter bypass valve opens at 0.147 MPa and confirm the engine's 68.0 cu.in. total displacement before you button anything back up. No more chasing specs across three different forums. Download it, search it by keyword, and have the factory answer on your phone before you pick up the first wrench.
What's Inside This Kobelco SK25SR-6 Manual
| System | Pages | Key Topics |
|---|---|---|
| General Cautions for Maintenance Work | 11-22 | Correct Work, Safety Precautions, Preparations, Cautions for Disassembly and Reassembly, Cautions for Removal and Installation of Hydraulic Equipment |
| Technical Data | 23-50 | 2-1 Specifications, 2-2 Outline Drawing and Working Area, 2-3 Weight List of Main Parts, 2-4 Lifting Capacity List, 2-5 Specifications for Attachment |
| Service Standards | 51-82 | Machine Performance, Engine, Undercarriage (Rubber Track Specifications, Steel Track Specifications, Common Specifications of Steel & Rubber Crawlers), Controls |
| Engine | 83-226 | 4-1 Safety, 4-2 Engine, 4-3 Fuel System, 4-4 Cooling System, 4-5 Lubrication System, 4-6 Starter Motor, 4-7 Alternator, 4-8 Electric Wiring |
| Electric System | 227-254 | 5-1 Electric Equipment of Machine, 5-2 Circuit Description of Engine Start and Stop, 5-3 Automatic Deceleration System, 5-4 Error Code List |
| Hydraulic System | 255-454 | 6-1 Outline, 6-2 Circuit Operation, 6-3 Hydraulic Pump, 6-4 Control Valve, 6-5 Pilot Valve, 6-6 Swing Motor, 6-7 Travel Motor, 6-8 Proportional Solenoid Valve |
| Adjustment and Repair | 455-552 | 7-1 Engine and Electric Equipment, 7-2 Undercarriage, 7-3 Controls, 7-4 Swing Bearing, 7-5 Hydraulic Equipment, 7-6 Work Implements, 7-7 Cabin |
| Troubleshooting | 553-564 | 8-1 Non-Breakdowns, 8-2 Quick Reference Table for Troubleshooting |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Return filter filtration accuracy | 10 u | p. 27 |
| Return filter by-pass valve opening pressure | 21 psi (0.147 MPa) | p. 27 |
| Fuel filter filtration area | 66.96 sq.in. (432 sq.cm) | p. 30 |
| Battery voltage - 5 hrs rate capacity | 12-36 V - Ah | p. 31 |
| Engine Total Displacement | 68.0 cu.in. | p. 29 |
| Rated Engine Output (GROSS) | 21.2 HP | p. 29 |
| Hydraulic Oil Tank Capacity | 10.3 Gals | p. 27 |
| System Relief Set Pressure (P1, P2) | 2987 psi | p. 25 |
| Swing Speed | 10 rpm | p. 24 |
| Intake Valve Clearance (Cold engine) | 0.008 in. | p. 29 |
| Radiator Cap Pressure | 12.8 psi | p. 30 |
| Engine Mount Vibroisolating Rubber Tightening Torque | 19 to 23 ft•lbf | p. 68 |
Kobelco SK25SR-6 Common Problems This Manual Covers
Kobelco SK25SR-6 hydraulic pressure loss with visible oil leaks at lines and fittings
Inspect all hydraulic fittings and hose connections for weeping or spray patterns. Verify the tank is full: hydraulic oil capacity is 10.3 Gals (page 27). Connect a gauge at the test port and confirm system relief pressure is at 2987 psi. Swap out any seals showing cracking or deformation before chasing pump or valve issues.
Manual Section: Hydraulic Pump TroubleshootingEngine won't start or turns over slowly in cold weather conditions
Check for relevant error codes in the '5-4 Error Code List' on pages 247-254. Verify the battery meets spec on page 31, then test terminals for corrosion and measure resting voltage with a multimeter. Inspect fuel filters; filtration area is 66.96 sq.in. and cold weather clogs them fast. Measure compression per before condemning the fuel pump.
Manual Section: Engine Troubleshooting (General)Machine upper structure won't swing left, rotation is sluggish and jerky
Test swing in both directions; rated speed is 10 rpm (page 24). If rotation locks or drags only left, connect a pressure gauge to the swing pilot circuit and verify secondary pressure rises smoothly. Check the swing motor case drain for bypass flow or contamination. Inspect parking brake release under the motor cover before any disassembly.
Manual Section: Swing Motor TroubleshootingEngine temperature spikes into the red during normal operation, EC-02 warning active
Test the radiator cap first: it must hold 12.8 psi (page 30). A cap that bleeds early drops the boiling point and triggers EC-02 well before actual overheating occurs. Confirm the code, then clean debris from the radiator core and verify thermostat operation. Check fan belt tension before pulling the head or pressure-testing the block.
Manual Section: Engine Troubleshooting (General)Machine pulls left or right during travel, fails to track straight on flat ground
Measure case drain flow from both travel motors: unequal output points to internal bypass on the weak side. Inspect track tension and check rollers on the drifting side for flat spots or seized bearings. Verify the high-speed control piston moves freely in each motor. Cross-reference the deviation symptom in the troubleshooting section at page 553.
Manual Section: Travel Motor TroubleshootingFrequently Asked Questions
How to reset the error code on Kobelco SK25SR-6?
To reset an error code on the Kobelco SK25SR-6, after solving the cause of the error, the error condition can be canceled by using the starter switch to turn the power OFF and then back ON. For example, for error code 00 000091.04 (Accelerator sensor malfunction: short circuit to low voltage side), the corrective measure is to check the connectors, harnesses, and accelerator sensor, then turn the starter switch OFF and ON to check if the error code is displayed again.
What are the torque specs for the main pump bolts on Kobelco SK25SR-6?
The tightening torque for the hydraulic pump mounting bolts (M12) on the Kobelco SK25SR-6 is 57.9 to 72.3 ft·lbf (78.5 to 98.1 N·m).
What is the procedure to reset the machine after an overheat alarm on Kobelco SK25SR-6?
After an overheat alarm, such as for error code 00 000110.00 (Engine coolant temperature sensor malfunction: too high), you should first inspect the engine cooling system, connectors, and coolant temperature sensor. To clear the error condition, turn the starter switch to the “OFF” position and then to the “ON” position.
How to reset the display monitor on Kobelco SK25SR-6
The manual does not specify a general 'reset' procedure for the LCD monitor itself. However, error conditions displayed on the monitor can be cleared by turning the starter switch to the “OFF” position and then back to the “ON” position after resolving the underlying issue.
How quickly can I access this manual after buying?
You get a 564-page searchable PDF that downloads instantly after checkout. Open it on your laptop, tablet, or phone, and bring it right to the shop floor.
Am I able to print pages from this manual?
Yes, print as many copies as you want, and there are no restrictions. Many mechanics print the section they need and bring it to the shop floor.
Can I find hydraulic circuit diagrams in this Kobelco SK25SR-6 manual?
Yes, complete hydraulic schematics with flow diagrams, valve configurations, and pressure specifications are included.
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