This document is a workshop manual that provides safety regulations, general instructions, technical specifications, maintenance procedures, and troubleshooting information for Rider 11, Rider 13, and Rider 16 ride-on mowers. It includes sections on delivery and dealer service, design and function, reparation instructions, and the electrical system. Specifications like dimensions, weight, engine details, oil types and capacities are provided for the Rider 11 and Rider 13 models. Tightening torques and special tools needed for repairs are also listed.