2003 Komatsu PC40MR-2/PC50MR-2 Hydraulic Excavator Operation and Maintenance Manual

Full technical coverage for Komatsu GALEO series excavators including hydraulic systems, engine specifications, and service schedules. Part No. SEAM055301T for models PC40MR-2, PC40MRx-2, PC50MR-2, and PC50MRx-2.

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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.

Komatsu Models Covered & Key Technical Specifications

Models: PC40MR-2, PC40MRx-2, PC50MR-2, PC50MRx-2
Build Years: 2003
Serial Numbers: PC40MR-2 8001 and up, PC40MRx-2 8001 and up, PC50MR-2 5001 and up, PC50MRx-2 5001 and up
Technical Data:

  • Engine displacement: 2.189 liters (133.5 cu in)
  • Rated power output: 29.4 kW (39 hp) at 2,350 rpm
  • Peak hydraulic relief pressure: 17.2–21.6 MPa (2,490–2,980 PSI)
  • Travel speed range: 2.8–4.6 km/h (1.7–2.9 mph)
  • Continuous swing velocity: 9.0 rpm
  • Bucket capacity range: 0.14–0.16 m³ (0.18–0.21 cu/yd)
Technical Specifications
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Document Number / Seller:
23761 / Lisa Phillips
File Size:
6.90 MB
File Type:
PDF
Language:
English
Pages:
265
Printable:
Yes
Category:
Mini Excavator
Last updated / verified
Jan 6, 2026

Komatsu Manual Features & Content Preview

2003 Komatsu PC40MR-2 and PC50MR-2 Operation Manual

  • Covers 2003 Komatsu PC40MR-2, PC40MRx-2, PC50MR-2, and PC50MRx-2 hydraulic excavators with matching serial number ranges starting at 8001 and 5001.
  • Official Komatsu publication P/N SEAM055301T, dated October 2003.
  • Contains 17 safety label diagrams, 15 safety warning illustrations, and 1 detailed fuse capacity circuit chart.
  • File link appears in your order confirmation straight away.
  • Suitable for printing individual sections for shop-floor use.
  • This 2003 OEM publication serves as the primary reference for the initial release of the Galeo-series PC40MR-2 and PC50MR-2 compact hydraulic excavators.

Operational Documentation

This manual documents safety precautions, machine controls, and operating procedures for the 2003 Komatsu PC40MR-2 and PC50MR-2. Chapters address pre-start inspections, safe machine operation techniques including slope travel and demolition work, and emergency egress procedures via the cabin window. The text defines the location of safety labels and the correct sequence for machine maintenance, including floor tilting and fuse replacement.

Technical Highlights

The manual details key technical parameters for the 2003 Komatsu PC40MR-2 and PC50MR-2, including operating speeds and relief pressure values. Engine oil capacity check and coolant levels are documented with specific references to the dipstick and sub-tank indicators. The fuse capacity chart lists amperage ratings for the engine stop solenoid and monitor panel components. Travel speed boost monitor logic for the 2003 Komatsu PC40MR-2 is outlined for performance under varied terrain conditions. An official 265-page Komatsu OEM operation manual covering the 2003 Komatsu PC40MR-2 and PC50MR-2 series, documenting safety, controls, and maintenance requirements for the Galeo-series hydraulic excavator.

Document Reference: SEAM055301T, October 2003

Manual FAQ, Purchase & Download Details

Is the Operation and Maintenance Manual provided as a downloadable PDF file? keyboard_arrow_down

Manual is available as a digital PDF document that can be downloaded upon purchase.

Does this manual cover the Komatsu PC40MR-2 and PC50MR-2 hydraulic excavator models? keyboard_arrow_down

Document serves as the Operation and Maintenance Manual specifically for the Komatsu GALEO PC40MR-2, PC40MRx-2, PC50MR-2, and PC50MRx-2 hydraulic excavator series.

What information regarding electrical systems can be found in the manual? keyboard_arrow_down

Manual includes sections covering fuse capacities, circuit names, block fuse locations, and auxiliary electric power connector specifications for both canopy and cab machine configurations.

Are there exploded views or diagrams showing maintenance access points? keyboard_arrow_down

Manual includes numerous illustrations showing access locations for components like the engine rear cover, cooling cover, mud cover, and the method for tilting the floor for inspection.

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