Komatsu PC05-6, PC07-1, PC10-6, PC15-2 Mini Excavator Shop Manual (P/N SEBM020M0604)

Komatsu shop manual P/N SEBM020M0604 covers the 1990s-era PC05-6, PC07-1, PC10-6, and PC15-2 mini excavators. Its four main sections cover structure and function, testing and adjusting, disassembly and assembly, and maintenance standards.

PDF Bookmarks, Search and Diagram Detail

Navigation and small labels: Embedded bookmarks link to chapters, components, and individual removal or installation sections. PDF text search is not available. Small wiring codes and connector numbers require zooming for comfortable reading.

Supplied as one printable, 248-page PDF in English, including the original cover, contents page, and two revised-page lists.

Hydraulic Testing and Chassis Repair

These selected coverage highlights outline the main workshop content rather than reproduce the full contents list. Additional topics include lubricant selection and component weights for handling and lifting.

• Engine checks: Valve-clearance adjustment, compression-pressure measurement, fuel-injection timing checks and adjustment, plus model-specific engine removal and installation.

• Hydraulic testing: Circuit-specific pressure checks and main relief adjustment, supported by performance standards for travel, swing, work-equipment speed, and hydraulic drift.

• Control valves: Selector-pedal and separate-control configurations, valve removal and installation, and step-by-step control-valve disassembly and assembly procedures.

• Travel and swivel repair: Travel-motor removal, PC05-6/PC07-1 motor and final-drive disassembly and assembly, and center swivel joint removal and seal-related assembly work.

• Chassis and work equipment: Swing-circle, radiator, hydraulic-pump, swing-motor, work-equipment, and blade removal and installation, with undercarriage and cylinder inspection standards.

• Electrical references: Model- and serial-specific wiring diagrams, connector layouts, starting-switch connecting tables, and electric wire color and size codes.

Written for service personnel carrying out workshop repairs, this manual assumes access to lifting equipment, hydraulic test instruments, and the specified service tools.

Engine Checks and Repair Scope

Engine data covers compression pressure, injection timing, valve clearance, oil pressure, and operating-speed checks for the listed engine families. The timing procedures distinguish shim adjustment on the smaller models from injection-pump mounting-angle adjustment on the larger models.

Engine coverage includes removal and installation, but this is not the separate engine-series overhaul volume. The manual’s introductory guidance identifies separate engine, electrical, and attachment volumes for work beyond the chassis manual’s scope.

Hydraulic Configurations and Fault Assessment

The valve layouts distinguish machines with a swing–boom swing selector pedal from those with separate swing and boom-swing controls. Component references cover 1-, 2-, 5-, 6-, 7-, and 8-spool valves, including additional-circuit equipment.

The hydraulic circuit diagrams, control-valve section views, and center swivel joint port diagrams let a mechanic relate an operating problem to the relevant oil path before selecting a pressure test. The testing section distinguishes swing safety-valve pressure from main relief pressure; these are not interchangeable readings.

Performance tables provide the measuring conditions and judgment standards for travel deviation, swing stopping, cylinder drift, and internal leakage. Hydraulic-pump coverage combines removal and installation with inspection clearances and delivery-test standards.

Travel Drive, Swing Circle and Wear Assessment

The PC05-6 and PC07-1 travel-drive procedures extend into the planetary gears, bearings, hydraulic motor, valve plate, and floating seals. The final-drive assembly instructions also explain the relationship between snap-ring thickness and bearing preload.

Maintenance-standard drawings identify inspection points for the track frame, recoil spring, idlers, track rollers, track shoes, cylinders, and work-equipment pins and bushings. Their standard dimensions and repair limits support decisions about component reuse or replacement.

Assembly cautions: The final-drive cover procedure warns of O-ring damage during installation. Swing-circle installation also calls attention to hoses and the center swivel joint, which can be trapped by the revolving frame.

Working on heavy machinery involves substantial physical risks. Observe the manual’s safety precautions, support raised assemblies, and release hydraulic pressure before opening a circuit.

Examples of Swing-Bearing and Pump Inspection Limits

For the PC05-6 and PC07-1 swing-circle bearing, standard axial clearance is 0.2–0.3 mm, with a 0.6 mm clearance limit. The PC10-6 and PC15-2 table specifies 0.05–0.25 mm, with a 0.4 mm limit.

For the PC10-6 and PC15-2 hydraulic pump, the side-plate-to-gear clearance table gives a standard range of 0.05–0.10 mm and a 0.15 mm limit. These examples show how the maintenance-standard section separates normal clearances from inspection limits.