Jerrysleathercrafts Report post Posted June 4, 2021 I have 2 juki lu1508nh and the clamp that holds the gear that operates the bottom shaft keeps coming loose. I have put it back several times but it keeps coming out of both the new machines. I have an older one that It has never happened to and they all do the same job. Does anyone know what causes it and how to fix it? Quote Share this post Link to post Share on other sites
Northmount Report post Posted June 4, 2021 @Jerrysleathercrafts moved your post to Leather Sewing Machines. Quote Share this post Link to post Share on other sites
CowboyBob Report post Posted June 5, 2021 (edited) 20 hours ago, Jerrysleathercrafts said: I have 2 juki lu1508nh and the clamp that holds the gear that operates the bottom shaft keeps coming loose. I have put it back several times but it keeps coming out of both the new machines. I have an older one that It has never happened to and they all do the same job. Does anyone know what causes it and how to fix it? It has a set screw that is on the outside of the pulley.You might have to take the belt off to get to it.Part#43 on page 10 in the parts manual. Juki_LU-1508N,_-1508NH.pdf Edited June 5, 2021 by CowboyBob Quote Share this post Link to post Share on other sites
Jerrysleathercrafts Report post Posted June 5, 2021 Page 10 is just a parts list Quote Share this post Link to post Share on other sites
CowboyBob Report post Posted June 5, 2021 (edited) 30 minutes ago, Jerrysleathercrafts said: Page 10 is just a parts list That set screw #43 is what locks the offset adjustable pin that is loosening that you are having a problem with. Edited June 5, 2021 by CowboyBob Quote Share this post Link to post Share on other sites
Jerrysleathercrafts Report post Posted June 5, 2021 Ok I will try this on Monday and give you an update. Thank you Quote Share this post Link to post Share on other sites
Jerrysleathercrafts Report post Posted June 7, 2021 I went ahead and loosened the oblong screw and tightened the screw in the gear. Then retightened the oblong screw. Hopefully it will hold now Quote Share this post Link to post Share on other sites
Uwe Report post Posted June 7, 2021 (edited) The Juki 1508 Engineer’s Manual (lu1510n.pdf ) describes how the adjustment of the safety clutch torque works, on page 32/33. Here’s a screen shot of the relevant section: Edited June 7, 2021 by Uwe Quote Share this post Link to post Share on other sites
Jerrysleathercrafts Report post Posted June 8, 2021 It worked fine today. I'll update if it happens again Quote Share this post Link to post Share on other sites
