This manual covers the SJ643 TH and SJ843 TH series, applicable to serial numbers 87 110 001 and above. These models represent a commitment to robust engineering and reliable performance, designed for demanding applications where durability and efficiency are paramount. Their construction emphasizes quality components and thoughtful assembly, ensuring a dependable operational experience for the user.

The purpose of this comprehensive guide is to provide detailed information for the maintenance and servicing of your vehicle. It includes essential sections such as recommended service parts and an in-depth look at the main frame, including sheet metal installation, frame subgroups, engine cowling, and fuel tank assemblies. This manual serves as an indispensable resource for owners and technicians alike, facilitating proper upkeep and ensuring the longevity and optimal functioning of the equipment.