The Selwood S100 pump, powered by a Deutz 2011 SERIES diesel engine, is a robust pumping unit designed for various pumping applications. Engineered for reliability and performance, this system is built to handle demanding tasks, ensuring efficient operation. Its integrated design combines the proven capabilities of the Selwood Seltorque S100 pump with the dependable power of the Deutz engine, making it a suitable choice for professional use. This manual serves as a comprehensive guide for the operation, maintenance, and repair of the Selwood S100 pump and its associated Deutz 2011 SERIES engine. It provides detailed information on routine maintenance, major servicing procedures, fault finding, and troubleshooting. Included are essential technical specifications, a parts list, and guidance for disassembly and assembly, empowering owners, mechanics, and technicians to effectively maintain and service the unit.