HC7140 FAQs & Troubleshooting HC7140 Not your product? Sort by Updated Date Popularity 4 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. 05/07/2015 How do I thread my machine? (For models equipped with the needle threader) 4. 04/07/2009 Place a spool of thread on a spool pin. Getting Ready FAQs & Troubleshooting