XL3700 FAQs & Troubleshooting XL3700 Not your product? Sort by Updated Date Popularity 3 Results 1. 12/12/2018 It is difficult to pass the thread through the needle bar thread guide(hook). 2. 12/12/2018 Upper threading (Point) 3. 07/27/2012 How do I thread my machine? (for models equipped with a needle threader) Getting Ready FAQs & Troubleshooting