This manual describes the features and characteristics, and the usage of the double needle flat sewing machine T-8420C, 8450C, 8720C, 8750C.
This manual covers safety precautions for operating the T-8420C, 8450C, 8720C, and 8750C sewing machines, including required protective equipment and environmental limits. It also details the proper installation procedure, emphasizing that two persons should perform the setup and that power must not be connected until installation is complete.
Operational guidance includes needle handling, lubricating oil use, and routine maintenance such as checking oil level, adjusting tension, and replacing worn parts. Troubleshooting tips address common issues like needle breakage, oil depletion, and abnormal machine behavior. This manual is written in Japanese.
Installation must be performed by at least two persons, on a stable surface, and power should not be connected until the installation is finished.
Replace the needle with a new one.
If the oil level falls below the marked line, add the appropriate lubricating oil.
Wear protective glasses and gloves.