This comprehensive technical service manual covers the Smiths Tachograph SG 20 and SG 24 models, offering a detailed guide for service centers. It delves into the intricacies of installation, calibration, sealing, and paperwork procedures for both single and dual tachographs, along with taco adapters. The manual also provides guidance on tachograph ancillary equipment like flexible drives. A dedicated section covers electric tachograph drive systems, encompassing installation and troubleshooting techniques. For electronic tachographs, the manual offers insights into calibration, installation, part numbers, and ratio tables. Finally, it explores the operation of digital turn counters and their role in calculating fuel efficiency. The manual is meticulously illustrated with diagrams to enhance understanding and facilitate practical application.

The Smiths Tachograph Technical Service Manual for the SG 20 and SG 24 models was a crucial resource for technicians working with these tachographs. This trade-only publication was strictly controlled, only available to authorized Smiths Tachograph service centers. The manual covered a wide range of aspects pertaining to these devices, from installation and calibration to sealing procedures and paperwork requirements. It provided detailed instructions on handling both mechanical and electronic tachographs, including the single and dual SG 20 and SG 24 models, as well as taco adapters and ancillary equipment like flexible drives. The manual also addressed electric tachograph drive systems, offering guidance on installation, troubleshooting, and fault-finding. Furthermore, the manual delved into the intricacies of electronic tachographs, covering their calibration, installation, and component part numbers. It included valuable ratio tables for accurate configuration. It also provided clear explanations of digital turn counters, their role in assessing fuel efficiency, and their operational principles. The inclusion of numerous diagrams further enhanced the manual's clarity, making it a comprehensive reference for understanding the diverse aspects of these tachographs. The scarcity of this manual underscored its importance within the industry, as it served as an essential guide for maintaining and repairing these critical components of commercial vehicles.