CV3440 FAQs & Troubleshooting CV3440 Not your product? Sort by Updated Date Popularity 5 Results 1. 01/25/2018 Turning direction of handwheel 2. 08/09/2017 Adjusting the thread tension dials 3. 08/02/2017 How to adjust the stitch length 4. 08/01/2017 How to adjust the looper thread tension 5. 08/01/2017 Opening and closing the front cover Operation FAQs & Troubleshooting