Komatsu has been engineering world-class diesel engines for over 90 years, powering the heavy equipment that builds infrastructure across the globe. Renowned for their exceptional durability and fuel efficiency, Komatsu engines like the S6D, SA6D, and SAA series are specifically designed to withstand the extreme demands of construction, mining, and industrial applications. Their engines feature advanced technology including high-pressure common rail injection, variable geometry turbochargers, and sophisticated electronic control systems that optimize performance while meeting stringent emissions standards. From compact S4D engines in small excavators to massive SAA12V140 engines in mining haul trucks, Komatsu diesels deliver the power, reliability, and longevity that equipment operators demand in the world's toughest working conditions.

RF Engine is your trusted source for Komatsu diesel engines and parts, supporting the yellow iron that moves mountains worldwide. We stock an extensive inventory of new aftermarket, remanufactured, and quality used Komatsu engines and components for all series—from compact S4D95 and 4D98 engines to powerful SA6D and SAA6D models. Whether you're rebuilding a 6D95 in an excavator, servicing a SAA6D114 in a wheel loader, or maintaining any Komatsu-powered equipment, our comprehensive selection covers every application. With hard-to-find parts availability, competitive pricing, and deep knowledge of Komatsu engines, RF Engine delivers the parts and expertise that keep your Komatsu equipment operating at peak performance and maximum productivity.