Within the hour you could be greasing bucket pins and inspecting rubber shoes on a hydraulic excavator with this 162-page Kobelco SK25SR, SK30SR, SK35SR operator manual PDF (OEM ID S3PW0003E-00) open on the seat beside you. Maintenance takes up more than a quarter of the book. Its lubrication charts and service schedules run from the 8-hour daily check through the 50, 250, 500 and 1,000-hour visits to the 2,000-hour service. Each of the three models gets its own oil viscosity and capacity table, next to torque tables for hydraulic hoses, joints and capscrews, while the operating chapters explain the monitor panel, every switch and lever, and how to remove and install rubber shoes. Clean the hydraulic tank suction strainer every 2,000 hours and tighten it to 12 ± 1 kgf·m (87 ± 7 ft·lbs). Every hour the machine sits, your crew sits with it. Bookmarks and a text layer take you from the index to the interval chart you want in seconds.
What's Inside This Kobelco SK25SR, SK30SR, SK35SR Operator Manual
| System | Pages | Key Topics |
|---|---|---|
| Important Information | 3 | Safety Information, Precautionary Measures, Safety Codes, Insurance Requirements, Safety Messages |
| For Ordering | 5 | Machine Serial Number, Engine Serial Number, Hour Meter |
| Safety | 6-35 | Precautions Before Operation, Precautions During Operation, Precautions During Inspections and Maintenance, Precautions When Handling Batteries |
| Operating Equipment | 36-51 | Location of Components, Monitor Panel, Arrangement and Operation of Switches, Arrangement and Operation of Levers, Fuse Box, Fusible Link, Storage Position of Tools |
| Operation | 52-85 | Inspection Before Starting the Engine, Check Before Operation, Handling of the New Machine, Adjustment Before Starting the Engine, Starting and Stopping the Engine, Warm-Up Running |
| Maintenance | 86-129 | Periodical Inspection and Maintenance, Precautions on Maintenance, Recommended Oil Viscosity and Its Capacity, Expendable Parts, Tightening Torques for Joints and Hydraulic Hoses |
| Transportation | 130-133 | When Preparing Transportation Plans |
| Specifications | 134-149 | Main Specifications, External Dimensions, Working Range, Shoe Types, Bucket Types, Overall Specifications of Boom, Overall Specifications of Arm and Bucket |
| Optional Device | 150-157 | Hydraulic Breaker, Operation Procedure, Precautions During Operation |
Quick Reference Specifications
| Specification | Value | Page |
|---|---|---|
| Hydraulic oil tank Suction strainer cleaning interval | Clean every 2000 hours | p. 99 |
| Engine oil filter replacement interval | After 50 hours (initial change), Every 250 hours (from 2nd change) | p. 98 |
| Engine Oil Filter Replacement Interval (Regular) | 250 hours | p. 91 |
| Inline filter tightening torque | 6-8 kgf·m (43-58 ft·lbs) | p. 129 |
| Pilot valve tightening torque | 3.5 ± 0.5 kgf·m (25 ± 4 ft·lbs) | p. 129 |
| Hydraulic Return Filter Replacement Interval (Regular) | 500 hours | p. 91 |
Kobelco SK25SR, SK30SR, SK35SR Common Problems This Manual Covers
Kobelco SK25SR/SK30SR/SK35SR engine turns over on the starter but will not fire in cold weather
Turn the key to HEAT and preheat for 15 seconds, then crank, following page 56. Never hold the key at START or run the air heater longer than 15 seconds; if it does not fire, return to OFF, wait 30 seconds and retry. Sound the horn first and never start with a warning tag on the lever (page 16). If a gauge cluster warning appears, stop the engine and troubleshoot.
Manual Section: Engine Troubleshooting (Starting) p. 56Weak or discharged battery will not turn the engine over at the start switch
Connect booster cables only to another 12V machine, never a welder, following page 57. Turn off all lamps and accessory switches. Run red from the dead positive terminal to the good positive, then black from the good negative to the dead machine's upper frame, away from the battery. Keep sparks and flames clear and shield your eyes (page 28); never short the starter circuit or battery (page 16).
Manual Section: Engine Troubleshooting (Starting) p. 57Engine will not start after a fuel filter change with air in the fuel system
Set the safety lever to LOCK, stop the engine, fill the tank and check that the fuel filter cock is OPEN, following page 97. Pump the priming lever beside the injection pump to push the air out first. Sound the horn before cranking (page 16). Set the throttle to high idle and crank in bursts of no more than 15 seconds, resting about 30 seconds between tries.
Manual Section: Fuel System Air Release p. 97Hydraulic tank not depressurized or repressurized around return filter and suction strainer service
Stop the engine on level ground, let the oil cool, then slowly loosen the air breather plug to bleed tank pressure (page 95). Never service it before releasing internal pressure (page 21). Change the return filter every 500 hours (page 91). Afterward, run low idle with the plug open, extend each cylinder to stroke end, and torque the plug to 3.0 ± 0.3 kgf·m (21.7 ± 2.2 ft·lbs) per page 96.
Manual Section: Hydraulic System Pressure Release p. 95Boom and arm stuck in the raised position after a failure and will not lower
Clear everyone from under the attachment first; page 65 warns the boom and arm can drop fast. Remove the cover and slowly turn the port relief valve locknut counterclockwise on the control valve until the attachment descends. Stop 30 to 40 cm (12 to 16 in) above ground if you need to move the machine, then call your KOBELCO distributor. It cannot be raised again.
Manual Section: Attachment Lowering (Emergency) p. 65Travel motor locked by a fault and machine will not travel off the work area
Remove the rubber shoes, set safety blocks under both lower frames, lower the machine and stop the engine (page 63). Relieve all hydraulic pressure before pulling hoses (page 6). Catch the draining oil, mark and cap each hose, remove the travel motor, then pull the counter balance valve spool and refit the plug (page 64). Repeat on the other side, move the machine to safety, and call a serviceman.
Manual Section: Travel Motor Lock Release p. 63Frequently Asked Questions
What are the engine oil and hydraulic filter replacement intervals on the Kobelco SK25SR, SK30SR, SK35SR?
The engine oil filter (cartridge) should be replaced after the first 50 hours and then every 250 hours. The hydraulic return filter (element) should be replaced after the first 50 hours and then every 500 hours. The suction strainer in the hydraulic oil tank should be cleaned every 2000 hours. p. 91
What are the replacement specs for the fuel filter and water separator elements on the Kobelco SK25SR, SK30SR, SK35SR?
The fuel filter element should be replaced every 500 hours. The water separator element should be cleaned or replaced when required. p. 91
What is the correct fan belt tension on the Kobelco SK25SR, SK30SR, SK35SR engine?
The fan belt tension is correct if the deflection is about 8 to 12 mm (0.3 to 0.5 in) when the center of the belt is pressed with your thumb. p. 118
What is the tightening torque for the hydraulic hose union nuts on a Kobelco SK25SR, SK30SR, SK35SR?
The tightening torque for hydraulic hose union nuts depends on the nominal screw size. For a 1/8 PF size, it is 1+0.5 kgf·m; for 1/4 PF, it is 2.5+0.5 kgf·m; for 3/8 PF, it is 5+0.5 kgf·m; for 1/2 PF, it is 6+0.5 kgf·m; for 3/4 PF, it is 12+0.5 kgf·m; and for 1 PF, it is 14+0.5 kgf·m. p. 92
Do I get instant access to this Kobelco SK25SR Operator Manual?
A 162-page Operator Manual in searchable PDF format, available the moment you complete checkout. View on computer, tablet, or phone, with no shipping wait.
Is this Kobelco SK25SR Operator Manual printable?
Yes. Printing works from any reader and any printer, for your own shop use.
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