1990–1993 Kobelco SK60 Hydraulic Excavator Shop Manual PDF (P/N S5LE0005E3)

Kobelco shop manual S5LE0005E3 covers SK60 hydraulic excavators from LE-11001 onward, including the electrical-system revision for LE-14101 onward. It combines machine troubleshooting, removal and installation procedures, component overhaul instructions, and Isuzu engine repair documentation.

• Engine repair: Engine removal, internal disassembly, cylinder-head and liner inspection, crankshaft measurements, reassembly, injection-nozzle service, and cooling-system repair.

• Hydraulic components: Main and gear pump overhaul, control and pilot valve service, swivel-joint rebuilding, and hydraulic-cylinder disassembly and inspection.

• Swing and travel: Motor and reduction-unit repair, parking-brake inspection, travel-bearing adjustment, and track, roller, idler, and sprocket service.

• KPSS controls: Mechatro controller engine-speed adjustment, stepping-motor setup, potentiometer checks, and solenoid proportional-valve secondary-pressure measurement.

• Electrical diagnosis: Serial-specific wiring diagrams, regional harness layouts, connector details, and starter and alternator testing and repair.

• Attachments and structure: Boom, arm, and bucket removal and installation, pin-and-bushing inspection, clearance adjustment, and upper-frame, cab, and counterweight removal.

• Air conditioning: Refrigeration-circuit troubleshooting, intake-unit and actuator service, refrigerant charging procedures, and electrical and compressor fault diagnosis.

This manual is suited to experienced heavy-equipment mechanics equipped for hydraulic testing, precision measurement, and heavy component handling.

Engine Repair and Fuel-System Applications

Internal engine work extends to cylinder-liner selection and replacement, valve and guide inspection, timing-gear assembly, and crankshaft bearing clearances. Lubrication and cooling sections cover oil-pump and water-pump repair, with thermostat inspection and engine troubleshooting charts.

Engine-specific data: The Isuzu material includes shared 4JA1, 4JB1, and 4JC1 tables. The SK60 uses the 4JB1 entries where these differ; the injection-pump performance and governor-adjustment sheet labeled 4JC1 PC only is not a 4JB1 calibration chart.

Engine characteristic curves and pump-connection construction drawings accompany the machine-level information. The drive-system section identifies suction-stopper assembly 24100P978F2 and provides its component and dimension drawings.

Hydraulic Testing and Component Overhaul

Performance inspection standards cover circuit-pressure measurement, cylinder speed and drift, swing braking, travel performance, and motor case-drain checks. Diagnostic flowcharts address symptoms such as pump cavitation, hydraulic overheating, and weak or uneven movement.

The hydraulic system diagrams distinguish wrist-control and semi-long-lever arrangements, with neutral, combined-motion, and dozer/extra-hydraulic circuits. Component sections add exploded views, wear limits, assembly checks, and pump control curves.

Travel-unit repair includes the reduction gear, brake valve, parking brake, bearing preload, and snap-ring selection. Swing reduction-unit instructions cover planetary gears and post-assembly checks.

Assembly cautions: The swivel-joint chapter warns that inserting the stem too quickly can damage its seals. The cylinder chapter explains how an unsupported piston rod can damage bushings and seals.

Have a qualified technician review critical structural or hydraulic adjustments before operation, observing the manual's precautions for retained pressure and supported loads.

Electrical Variants and Mechatro Adjustment

The separate later electrical section and export, European, and Northern European harness layouts help identify the correct circuit before tracing a fault. Connector views show wire codes and terminal locations; the engine electrical section supplies starter-coil resistance data and alternator inspection specifications.

Mechatro adjustment instructions distinguish controller versions during engine-speed setup. The control-system chapter also separates cable-operated travel controls from pilot-valve arrangements.

Attachment References and Air-Conditioner Service

Attachment combination tables, working-range drawings, and lifting-up ability diagrams distinguish standard, long-arm, and extension-arm configurations. Component-weight tables support removal planning, while working standards provide coarse- and fine-thread torque tables and sealing-compound references.

The air-conditioner section documents the original R-12 system, including refrigerant filling and leak checks, control-amplifier and actuator adjustments, and a dedicated wiring diagram with connector details.

Operating instructions and preventive-maintenance schedules are assigned to the separate operator's manual.

A Sample of 4JB1 Adjustment Specifications

These examples are a small selection of the engine adjustment data in the manual. For the SK60's Isuzu 4JB1, intake and exhaust valve clearance is 0.40 mm (0.016 in.) with the engine cold, alongside the valve-adjustment procedure.

The model-specific engine table lists injection starting pressure as 185 kgf/cm² (2,630 psi). The fuel-system section describes nozzle inspection, opening-pressure testing, and adjustment.

Reading the PDF and Its Included Sections

Search, navigation, and diagram detail: PDF text search and embedded bookmarks are unavailable. Small wiring and connector labels require zooming; some drawings also require rotation. In the swing reduction-unit chapter, printed pages 9–12 appear out of sequence.

One printable 748-page PDF contains 530 pages of Kobelco machine and component documentation and 218 pages of Isuzu industrial diesel workshop manual IDE-2170. Covers, section indexes, and 13 note pages are already included in these totals.