Kobelco SK100, SK120, SK120LC Excavator 1990-1996 Shop Manual

Kobelco SK100, SK120, SK120LC Excavator — covering general systems, specifications, and maintenance. Part Number S5LP0105E

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Technical Safety Notice
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This official OEM document is intended for professional technicians and skilled operators. Performing service on mechanical equipment involves inherent risks. By purchasing, you acknowledge that RepairLoader provides original manufacturer data for informational purposes. Always prioritize safety: use correct tools, wear protective gear, and consult a certified professional if you are uncertain of any procedure.

Kobelco Models Covered & Key Technical Specifications

Models: Kobelco SK100, SK120, SK120LC
Sub-models / Variants: SK100, SK120, SK120LC, Standard, LC (Long Crawler)
Build Years: 1990–1996
Serial Numbers: YW-03371~, LP-06191~, YP-01601~
Technical Data:

  • Engine model: Isuzu 4BD1 (SK100), Isuzu 4BD1T (SK120/SK120LC)
  • Engine configuration: 4-cycle, water-cooled direct injection diesel
  • Displacement: 3,856 cc (235 cu in)
  • Max swing speed: 12.7 rpm
  • Rated power (SK100): 76 ps / 2,300 rpm
  • Rated power (SK120): 85 ps / 2,150 rpm
  • Operating weight: 10,500–11,700 kg (23,100–25,800 lbs)
Technical Specifications
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Document Number / Seller:
30611 / Betty Miller
File Size:
41.47 MB
File Type:
PDF
Language:
English
Pages:
775
Printable:
Yes
Category:
Excavator
Last updated / verified
Sep 22, 2025

Kobelco Manual Features & Content Preview

Kobelco SK100, SK120, and SK120LC Excavator Technical Documentation

  • Covers 1990–1996 Kobelco SK100, SK120, and SK120LC crawler excavators, including standard and long-crawler variants
  • Original OEM publication book code S5LP0105E, first edition March 1990 with 1990-11 revision
  • Contains 47 detailed exploded-view component diagrams and 18 technical troubleshooting flow charts
  • Files download to your account within seconds of checkout
  • Unlimited re-downloads tied to the purchase record
  • Suitable for printing individual sections for shop-floor use
  • Indexed PDF search covers every chapter and appendix
  • This official reference documents the foundational service parameters for the YW, LP, and YP series hydraulic excavators

Manual Coverage and Systems

The Kobelco SK100, SK120, and SK120LC shop manual provides technical details organized into general, system, component, and procedural sections. This 775-page document outlines specifications, component locations, weight charts, and maintenance standards for the factory workshop documentation required for machine maintenance.

Chapters include drive system mechanics, hydraulic circuit configurations, swing performance data, travel system adjustments, and electrical system schematics. Procedural instructions for mechatro controller settings, pressure measurement, and valve adjustments are also provided for these specific Kobelco SK100, SK120, and SK120LC models.

Specification and Data Preview

Engine specifications for the SK100 document an Isuzu 4BD1 powerplant, while the SK120 and SK120LC feature the turbocharged 4BD1T. The manual lists torque values for metric coarse and fine threads, pressure settings for relief valves, and hydraulic oil cleanliness standards.

Main relief valve pressure for the SK100 and SK120 is documented at 290–295 kgf/cm² in H-mode. Engine compression pressure is specified at 31 kgf/cm² at 200 rpm for both powerplants. The Kobelco SK100, SK120, and SK120LC swing motor drain rate is documented as a maximum of 5–7 l/min depending on the specific machine configuration. Reference only — always consult a certified technician before performing service on this equipment.

An official 775-page Kobelco OEM shop manual covering the 1990–1996 SK100, SK120, and SK120LC excavators, documenting engine, hydraulic, electrical, and structural specifications for the YW, LP, and YP series machine builds.

Manual FAQ, Purchase & Download Details

Are system chapters for the hydraulic, drive, and attachment segments included in this shop manual? keyboard_arrow_down

Document covers these core machine systems through dedicated sections like the drive system, hydraulic system, and various attachments. Each section provides reference data relevant to the architecture of the SK100, SK120, and SK120LC models.

Does the manual contain specification tables for engine performance, weight, and component dimensions? keyboard_arrow_down

Specification sections contain comprehensive tables detailing engine output, total machine weights, and general dimensions for the supported excavator configurations.

Can I find information regarding hydraulic component layouts, including valve functions and pump specifications? keyboard_arrow_down

Manual includes detailed component sections that list the hydraulic pump types, control valve arrangements, and other hydraulic motor specifications. These sections also provide exploded view references for major components. Such documentation helps in understanding the machine layout without providing procedural repair guidance.

Is the publication date and document identity clear for this shop manual? keyboard_arrow_down

Manual is identified by book code S5LP0005E and includes revision information from 1990.

What kind of attachment and working range data is available in the document? keyboard_arrow_down

Manual lists extensive working range charts and attachment combination tables for various arm and bucket configurations. These reference tables show the digging reaches and heights specific to the different machine setups supported by the document.

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