We’ll explain how to thread the top cover stitch. Sew a cover stitch seam first before threading the top cover thread. Turn the handwheel toward you and align its mark with the top cover mark on the machine. Install these parts before sewing the top cover stitch. With the top cover spreader opened, clamp it onto the top stitch drive shaft from the right side. Insert the top cover thread guide. Turn the handwheel toward you until its mark is aligned with the line on the machine. After passing the thread through thread guides 1 and 2, pass the thread through 3. Then, pass the thread through the top cover thread tension dial, and pass the thread through the thread guides. Pass the thread through this part of the top cover thread guide. Raise the presser foot lever, and then pass the thread under the presser foot. Make sure that the thread is taut, and then lower the lever to return the presser foot to its original position. Please Turn the handwheel towards you a few times to check that stitches are formed. This completes threading.