Komatsu PC27MRX–PC45MRX Excavator Shop Manual (P/N SEBM016808)

947 Pages • 55.86 MB • Instant, Printable PDF

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Komatsu Models Covered & Key Technical Specifications

Models: Komatsu PC27MRX-1, PC30MRX-1, PC35MRX-1, PC40MRX-1, PC45MRX-1

Sub-models / Variants: Canopy specification, Cab specification

Model Year: 2003

Serial Numbers: PC27MRX-1 (11574 and up), PC30MRX-1 (10001 and up), PC35MRX-1 (3930 and up), PC40MRX-1 (1001 and up), PC45MRX-1 (1001 and up)

Technical Data:

  • Engine displacement: 1.490 liters (1,496 cc) for 3D84E-3 engine

  • Maximum rated power: 20.6 kW at 2,500 rpm (PC30MRX-1 configuration)

  • Peak torque: 85.3 N·m (8.7 kgm) at 1,800 rpm

  • Main hydraulic relief pressure: 26.3 ± 0.49 MPa (268 ± 5 kg/cm²)

  • Cooling system max temperature: 120°C (248°F)

  • Swing motor speed: 9.3 rpm

Technical Specifications
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Document Number / Seller:
23757 / Sharon Miller
File Size:
55.86 MB
File Type:
PDF
Language:
English
Pages:
947
Printable:
Yes
Category:
Mini Excavator
Last updated / verified
Jun 4, 2026

Komatsu Manual Features & Content Preview

  • Covers 2003 Komatsu PC27MRX-1 through PC45MRX-1 excavators, including both canopy and cab configurations
  • Original OEM publication (Form SEBM016808, August 2003)
  • Contains 947 pages of exploded-view diagrams, hydraulic schematics, and standard torque tables

Time is money on the shop floor. When a Komatsu excavator goes down, you need accurate specifications immediately. This 947-page factory manual gives technicians, mechanics, and dedicated DIYers the exact structural, hydraulic, and electrical data required for the MRX-1 series.

Working with heavy industrial equipment involves managing severe hydraulic pressures and massive components; always consult the specific safety tolerances and maintenance standards outlined in these pages before beginning any service work.

The guide details essential performance parameters to help you accurately identify machine configurations and maintenance needs. Technical data pages cover precise fluid capacities, lubrication schedules, and specific electrical wire codes. Key reference highlights include the 3D84E-3 engine displacement (1,496 cc), the PC27MRX-1 main control valve relief pressure (26.3 MPa), and a swing motor rated speed of 1,266 rpm.

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.

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