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

• 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.