2000–2003 Kobelco SK25SR-2 Mini Excavator Shop Manual (P/N S5PV0001E②)

This Kobelco shop manual covers 2000–2003 SK25SR-2 mini excavators in the PV08 and PV09 machine series, including US, EU, and Oceania configurations with rubber or iron crawlers. P/N S5PV0001E② identifies the overall manual; its section revision records include the January 2003 second revision.

Printable PDF and Wiring Detail

Text search, navigation, and diagrams: PDF text search is unavailable, and there are no embedded PDF bookmarks. Small wire codes and connector labels in the detailed electrical drawings need zooming for comfortable reading.

One printable, English-language PDF contains 591 pages, including five opening cover, index, and safety pages. Section title and revision pages, along with the integrated Yanmar engine material, are included in that total.

Hydraulic Testing, Component Repair, and Undercarriage Service

The following selected coverage highlights outline the main workshop content. Additional reference material includes machine and attachment dimensions, lifting-capacity charts, engine performance curves, and unit-conversion charts.

• Hydraulic diagnosis: Main and pilot pressure measurements, travel and slew performance tests, motor drain checks, cylinder drift measurements, and symptom-based troubleshooting charts.

• Hydraulic component repair: Step-by-step disassembly and assembly procedures for the variable-displacement pump, control valve, pilot valves, slewing motor, and swivel joint.

• Attachments and cylinders: Bucket, arm, boom, swing bracket, and dozer removal and installation, cylinder seal replacement, and pin-and-bushing inspection standards.

• Undercarriage and travel drive: Rubber and iron crawler removal, lower-roller and front-idler service, idler-adjuster disassembly, travel-motor overhaul, and slewing-bearing work.

• Electrical fault tracing: Wiring diagrams, harness connection tables, connector views, and troubleshooting for starting, instruments, lever locks, travel-speed selection, and optional deceleration.

• Engine repair: Yanmar 3TNE74-NYBB removal and installation, internal disassembly and reassembly, inspection procedures, and engine-specific service data.

This manual suits experienced equipment mechanics with hydraulic test equipment and lifting facilities; its hydraulic overhaul guidance calls for personnel with specific knowledge or component-service training.

Hydraulic Circuits and Repair Decisions

The circuit explanations trace travel, bucket, arm, boom, swing, and dozer operation, including combined movements. Regional differences cover mechanical versus hydraulic pilot controls and nibbler/breaker arrangements.

The teardown instructions and inspection standards support planning component repairs and assessing whether worn parts need replacement. Diagnostic flowcharts compare pilot pressure, spool movement, and motor drain results to distinguish control, pump, and actuator faults.

Control-valve service includes post-assembly relief-setting, leakage, and flow-resistance tests requiring hydraulic test equipment. Relief and anti-cavitation valve teardown descriptions are supplied for reference; the manual directs replacement of faulty assemblies.

Nibbler/breaker circuits are covered, but the separate optional-attachment installation section listed in the overall index is not included in this PDF.

Wiring, Harnesses, and Serial-Specific Controls

Separate PV08 and PV09 electrical layouts include harness routing, wire-color identification, terminal connections, and equipment specifications. The USA hand-control arrangement has its own main and instrument-panel harness drawings.

Useful illustrations include the Standard Circuit Diagram, Schematic Piping for Hydraulic System, Electric Circuit Diagrams, Instrument Panel Harness drawings, and Travel Motor Cross Sectional View. These connect system operation with component locations and internal construction.

Wear Inspection and Workshop Preparation

Attachment tables distinguish standard clearances, repairable levels, and service limits for pins, bushings, and thrust clearances. Undercarriage sections provide corresponding inspection criteria for rollers, idlers, crawlers, and travel-drive components.

Dimensioned cylinder-seal jigs, travel-motor tooling, and a counterweight lifting jig support workshop preparation. Standard maintenance time tables assist job planning and explain their workshop assumptions and excluded diagnosis, machining, and travel time.

The travel-motor drain-test notes warn that an incorrect rotation direction against the stopper pin can break the sprocket rib. Hydraulic installation precautions also identify component damage that can result from operating without the specified filling and air release.

Follow the manual’s precautions for supported attachments, trapped hydraulic pressure, and lifting heavy assemblies.

Yanmar Engine Inspection and Scope

The integrated TNE-series material covers compression testing, injector pressure and spray checks, injection timing, valve adjustment, and internal wear measurement. Cylinder-head, piston, connecting-rod, crankshaft, gear-train, and lubrication-system data distinguish the applicable engine entries.

Other TNE engines appear in the shared engine material; they do not expand excavator model coverage. The separately indexed final Yanmar tightening-torque chapter is absent from this PDF, although torque information appears elsewhere in the supplied manual.

Examples of Valve-Clearance and Slew-Drain Data

For the 3TNE74-NYBB, intake and exhaust valve clearances are both 0.2 mm (0.008 in) with the engine cold.

The SK25SR-2 slewing-motor drain test lists 4.2 liters per 30 seconds as the standard value and 9 liters per 30 seconds as the service limit. These figures apply at rated engine speed, with hydraulic oil at 50–60°C and the specified full-stroke relief test conditions.