2003+ Komatsu S6D125-2, D65E-12, D75S-5, SA6D125-2, D85A-21, D85P-21, WA470-3, PC400-6 Diesel Engine Shop Manual

Technical Scope of the Komatsu 125-2 Series Diesel Engine Manual

• Covers the 2003+ Komatsu 125-2 series diesel engines, including 6D125-2, S6D125-2, SA6D125-2, and SAA6D125-2 variants across bulldozer, excavator, generator, and truck configurations
• Official Komatsu publication P/N SEBM006410, printed May 2003
• Contains 47 high-precision assembly diagrams for side, front, rear, and top views plus 18 performance curves and comprehensive torque-specification tables
• Accessible from your device as soon as the order is placed
• OCR text layer lets you jump to a torque spec by keyword
• Laid out for standard letter and A4 printing
• Documentation for 40+ specific Komatsu machine models ranging from bulldozers to mobile crushers and heavy-duty generators
• This 399-page shop manual is the definitive reference for the 125-2 engine family, documenting critical tolerances and maintenance standards for every supported industrial power application

Engine Service and Specifications

This factory manual provides technical documentation for the Komatsu 125-2 diesel engine series. The content is organized to facilitate identification and service work, starting with clear classification codes for electrical wiring, technical specifications, and general assembly drawings for every supported machine. The publication details standard tightening torques for metric bolts, flared nuts, and O-ring boss piping joints, ensuring precision during component assembly.

Maintenance and Technical Data Preview

The manual includes detailed performance curves for every major application, mapping flywheel horsepower and torque outputs across the RPM range. Technical data includes specific lubrication capacities and coolant volumes for machines such as the D65E-12, WA470-3, and PC400-6. You can find detailed technical guidance on what an OEM service publication covers within the structure and function chapters. Maintenance standards are provided to guide inspection of major components including turbochargers, cylinder heads, and fuel injection pumps. Reference values are documented for all primary engine configurations to support professional-grade maintenance. Reference only — always consult a certified technician before performing service on this equipment.

An official 399-page Komatsu OEM shop manual covering the 2003+ 125-2 diesel engine series, documenting performance curves, technical specifications, assembly diagrams, and torque values for diverse industrial machinery and generator applications.

Document Reference: SEBM006410, printed May 2003