2003-2008 Komatsu PC27/PC30/PC35/PC40/PC50MR-2 Service Manual
Complete factory service documentation for Komatsu mini excavators. Covers hydraulic systems, engine specifications, and component procedures. SEBM032406 reference manual (622 Pages)
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Sample pages from the 2003-2008 Komatsu PC27/PC30/PC35/PC40/PC50MR-2 Service Manual manual
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Komatsu Models Covered & Key Technical Specifications
Models: PC27MR-2, PC30MR-2, PC35MR-2, PC40MR-2, PC50MR-2
Sub-models / Variants: Canopy specification, Cab specification, X-weightless specification, Steel shoe specification, Rubber shoe specification
Build Years: 2003–2008
Serial Numbers: PC27MR-2 15001 and up, PC30MR-2 20001 and up, PC35MR-2 5001 and up, PC40MR-2 8001 and up, PC50MR-2 5001 and up
Technical Data:
- Engine displacement: 1,330 to 2,189 cc
- Main hydraulic system pressure: 24.5 MPa {250 kg/cm2}
- Maximum digging depth: 3,800 mm (PC50MR-2)
- Boom cylinder stroke: 552.5 mm
- Rated engine output: 18.9–29.4 kW
Komatsu Manual Features & Content Preview
Komatsu PC27MR-2 to PC50MR-2 Hydraulic Excavator Documentation
- Covers 2003–2008 Komatsu PC27MR-2, PC30MR-2, PC35MR-2, PC40MR-2, and PC50MR-2 hydraulic excavators in both canopy and cab configurations
- Official OEM publication SEBM032406, dated January 2005
- Contains dozens of technical diagrams, hydraulic system schematics, electrical wiring codes, and component-specific maintenance standards
- Delivered as a direct download the moment payment clears
- Indexed PDF search covers every chapter and appendix
- This 2005 shop manual is the authoritative factory reference for the MR-2 series, defining the engineering specifications for all five models across their respective serial number ranges
Document Scope and Technical Highlights
Component and System Documentation
The provided shop manual covers the complete technical architecture of the Komatsu PC27MR-2 through PC50MR-2 range. Each section details the construction and function of critical assemblies, including the swing machinery, hydraulic power train, and undercarriage components. Readers find specific guidance on the operation of the cyclone assembly, hydraulic tank maintenance, and the function of the counterbalance valve and parking brake. Specialized data tables allow for precise identification of carrier and track roller specifications, idler dimensions, and track shoe configurations including rubber, double, and triple grouser types.
Technical Reference and Specification Data
This document includes extensive service standards, such as torque values for bolts, nuts, and flared nuts, which are organized by thread diameter. The manual lists specific piston rod and bushing clearance limits for boom, arm, bucket, boom swing, and blade cylinders. Fluid capacities are documented for engine oil, hydraulic systems, and coolant. The hydraulic pump set pressure is 24.5 MPa for these models. Piston rod diameter for the PC50MR-2 arm cylinder is 50 mm. Maximum digging depth for the PC50MR-2 is 3,800 mm. Refer to how factory workshop documentation is structured for additional insight into factory service terminology. Note: All service data shown here is for reference only — qualified technicians and the original OEM documentation remain the authoritative source for any hands-on work. An official 622-page Komatsu OEM workshop manual covering the 2003–2008 PC27MR-2, PC30MR-2, PC35MR-2, PC40MR-2, and PC50MR-2, documenting engine, chassis, electrical, and hydraulic system specifications for the MR-2 series builds.
Document Reference: Shop Manual SEBM032406, January 2005, Komatsu America Corp.
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