2003 Komatsu WB140-2N / WB150-2N Shop Manual (P/N CEBM009802)

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Komatsu Models Covered & Key Technical Specifications

Models: Komatsu WB140-2N, Komatsu WB150-2N

Model Year: 2003

Serial Numbers: WB140-2N A20001 and up, WB150-2N A60001 and up

Technical Data:

  • Hydraulic system maximum pressure: 15 MPa

  • Steering unit displacement: 160 cc/rev

  • Piston rod mounting pin clearance: 0.114 mm

  • Standard shaft/hole size rating: 50 mm

  • Bucket cylinder test mass limit: 40 kg

  • Hydraulic fluid operating temperature: 45 C

Technical Specifications
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Document Number / Seller:
28460 / Harold Collins
File Size:
110.21 MB
File Type:
PDF
Language:
English
Pages:
406
Printable:
Yes
Category:
Backhoe Loader
Last updated / verified
Jun 5, 2026

Komatsu Manual Features & Content Preview

  • Covers 2003 Komatsu WB140-2N and WB150-2N backhoe loaders (Serial Numbers A20001, A60001 and up)
  • Official 406-page OEM publication (P/N CEBM009802 / CEBM009800, May 2003 edition)
  • Delivered as an instant PDF download directly to your account immediately after checkout
  • Contains 85 system-specific schematic diagrams and 6 detailed component tolerance tables

System Documentation & Diagnostics

This technical reference breaks down the power train, hydraulic circuits, and working equipment. It defines the exact structure and operating principles for the engine-to-transmission coupling, front and rear axle differentials, and final reduction gears. The manual also maps out component layouts for control valve blocks, steering units, and the complete backhoe assembly.

Critical Specifications & Tolerances

Built for daily workshop diagnostics, this guide details CLSS (Closed Center Load Sensing System) characteristics, including precise pressure settings and delivery compensation operations. It provides the exact cylinder and gear specifications needed to verify tolerances on the hydraulic pump swash plate, steering unit displacement, and axle clearances. Standard tightening torques for bolts ranging from 6 mm to 39 mm are clearly tabulated in Nm and kgm for precision assembly.

Always ensure that any hands-on diagnostic or maintenance work is performed by qualified personnel referencing these official OEM values to maintain safe machine operation.

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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