The Husqvarna Viking 150 was one of the company's professional-grade sewing machines, allowing users access to basic sewing functions as well as a variety of stitching and basic embroidering techniques. Each sewing machine has its own unique means of threading the device's needle, and the Viking 150 is no exception. The good news, though, is that the threading mechanism for the 150 remained fairly consistent through the 160, 180, 190 and 150E models, making the process a familiar ritual for many.
Threading the Bobbin
Place the bobbin case and bobbin side by side so that you are looking into the case, and the circular brand on the top of the bobbin is showing. The end of the thread should come up and over the right side of the bobbin.
Place the bobbin into the case, threading the thread through the side of the case so it passes directly under the tension spring. Pull the thread through, checking that the bobbin rotates clockwise.
Open the bobbin compartment on the sewing machine. Insert the threaded bobbin case down and to the right to slip into its compartment. Press the case down until it clicks.
Pull the thread out of the side of the bobbin case until you have a length that extends out of the compartment. Thread this length into the thread cutter on the edge of the compartment.
Pull the thread tight in the cutter to snip the excess. This readies the thread for feeding into the machine. Close the bobbin compartment.
Threading the Needle
Raise the pressure pedal so the machine's needle is at its highest position. Load a spool of thread onto the left spool pin on the top of the machine.
Feed the thread into the guide on the upper arm on the top left side of the machine. Draw this arm upward.
Draw the thread down between the tension discs on the front face of the machine. Loop the thread around the guide arm above the needle and draw it back up to loop through the take-up lever which runs down the machine's front face. The thread should now form an "N" shape on the front face of the machine, which does not loop back over itself at any point.
Feed the thread down and through the black guide-hole on the needle housing. Thread the needle itself, feeding the thread from the front to back of the machine.
Tread gently on the pedal so the needle depresses below the machine's pressure-foot. Pull at least 7 inches of thread through the needle's eye, under the heel of the pressure foot and past the rear of the machine. Both threads are now loaded and ready for sewing.