This workshop service repair manual covers the STIHL TS 400 cut-off saw, a robust tool engineered for professional use. Featuring a powerful 64.1 cc, 4.4 Hp two-stroke engine, it delivers outstanding cutting performance. The TS 400 is designed with user comfort in mind, incorporating an ElastoStart shock-absorbing starter handle and a semi-automatic belt tensioner for efficient operation. Its versatility is further enhanced by compatibility with 12" or 14" cutting wheels, achieving a spindle speed of 5350 rpm. Weighing 20.8 lbs, this cut-off saw balances power with manageable handling for demanding tasks. This comprehensive manual provides essential diagnostic, repair, and maintenance information to ensure the optimal performance and longevity of your STIHL TS 400. It details procedures for critical systems, including the fuel system, and offers extensive troubleshooting guidance with detailed diagrams. The manual also covers the use of special tools required for servicing. Its scope is designed to assist owners, mechanics, and technicians in performing routine maintenance, complex repairs, and in-depth diagnostics, facilitating reduced service intervals and efficient upkeep of this professional-grade equipment.