This manual covers the Yanmar B15-3, B17-3, and B18 excavators, designed for a range of operational tasks. These machines are built with Yanmar's commitment to engineering quality and reliability, offering efficient performance for various construction and utility applications. The comprehensive nature of this guide ensures that owners and operators can fully leverage the capabilities of their equipment. The purpose of this English-language manual is to provide detailed operational and maintenance guidance for the specified Yanmar excavator models. It covers routine maintenance, operational procedures, and usage instructions essential for the longevity and optimal performance of the equipment. This resource is invaluable for owners, operators, and technicians seeking to understand and maintain their Yanmar excavators effectively.