This manual covers a comprehensive range of industrial equipment, including various models within the GDP, GLP, and GP series, across multiple series designations such as A810, A875, A876, A877, A878, A909, B810, B813, B875, B876, B877, B878, B909, C810, C813, C875, C876, C877, C878, D876, D877, D878, E177, E813, E876, E877, E878, F813, F876, F877, G813, H813, and J813. These models are designed for demanding operational environments and represent advanced engineering for reliability and performance. This service manual provides essential information for the maintenance, repair, and technical understanding of the listed equipment. It includes detailed procedures, diagnostic information, technical specifications, and safety guidelines, ensuring that owners, technicians, and mechanics can effectively service and maintain the equipment to optimal operational standards. The content is structured to facilitate efficient troubleshooting and repair, promoting longevity and peak performance.