Yoshi888

Thank you very much @friquant for the videos. They were very helpful. I had been wondering how I get these measurements right and the tips from the video were extremely useful! I have also found the needed measurements from mine in the Manual. But alas it seems theres one problem left. I have prepared everything and removed the screws (4,8) as instructed. But the gear on the horizontal shaft does not move or rotate an inch. I understood from the manual that after loosening the screws I could retract it to disengage with the wheel on the vertical shaft, allowing me to adjust the hook in the proper position before engaging and fixing the gear in place again. But I absolutely can't get it to move and didn't want to use more force in case I misunderstood how this steps works. Did I misunderstand the process or is the gear just very stuck? Kind regards Josh 😇

Finally had some time to properly check and fix everything. I first readjusted the gear on the horizontal axis, but that did not seem to make too much of a difference. Next, I checked where the play on the horizontal axis came from. So I removed the Belt cover and opened everything up. I found that the bushing that keeps the axis in place (as shown in the screenshot) had come loose. Resetting that part removed all the play in the axis and also stopped my machine from locking up! So it seems I have found the culprit and fixed it! The only remaining problem seems to be that while doing all that, I have changed my needle timing after all... As seen in the video below. It seems in the end I will also have to learn how to adjust the needle timing. At least once I learned that as well, I am confident I probably will not need a mechanic for my machine anytime in the near future, which is good as the next one is more than 200 km 😂 @AlZilla @friquantThank you so much for the help, I appreciate it a lot. Do you also have any tips or resources for setting the needle timing :)? Kind Regards Josh PXL_20251022_210024307 (1).mp4

I was a bit to curious to wait so I just went over to the workshop to take a look. It seems the horizontal shaft has some play. I screwed in the center screw of the bobbin to pull up the vertical shaft and tested the two cases. When I pull it outwards (to the left) it does not bind up. When I push it in (to the right) it binds up at a fixed position. So my best thought at the moment is also what @friquant suggested. Once I collect my nerves this week, I'll try to reset the horizontal shaft and fix it in place again. Hopefully, if I watch out for the correct position, I can also save my hook/needle timing. But that already gives me hope I don't have to order spare parts again. That was quite an ordeal last time. @AlZilla If the above doesn't fix it that will then be my next task. I think the Belt connects only to the top, so I assume it uses gears but I'll double check below the cover next time because that would probably also be a good thing to know about my machine. Here is also a video again that shows it a bit better than I can explain. PXL_20251013_185331839 (1).mp4

Thank you so much for the advice I took a look at the gears, and there are no teeth missing. It appears that the vertical driving shaft has some play, but I think that might be because it is fixed to the center screen on the Bobbin Carriage (Sorry, I sometimes don't know the proper part names yet.) I cleaned any dirt on the bevel gears, but that did not change anything. I'll take another closer look tomorrow, but if I cannot find anything else, I will probably start removing the other parts to take a closer look at the vertical shaft. Is it possible to disassemble it further without ruining the needle/hook timing?

Hey everyone, I love my Juki-341N, but it seems I once again managed to damage my poor machine. I was sewing as usual, but suddenly it bunched up. I removed my work piece and the thread, but also with the handwheel, it was not properly turning anymore. So I started disassembling it to see if there was some thread stuck near the bobbin, but there wasn't anything. Then I removed the whole shuttle to see if there was anything wrong. I have attached a video here, and it seems the bushing inside the brass/copper ring gets stuck when I turn the handwheel too fast. I have cleaned everything I can, and I cannot find anything stuck anywhere. If I slightly push on the Bushing, it seems to work better, but also after cleaning and reattaching the bobbin, it gets stuck very easily. I did not want to disassemble it more because I am not too knowledgeable about this, and I am worried about ruining the alignment/timing. Do you have any idea what could have happened here and how I could fix it? In case it is relevant, I changed the shuttle a few months ago, but there have not been any problems since then. PXL_20251010_182024859 (1).mp4

While I am usually more active on Reddit, I want to become more active here as well so I thought I would also post a bit of an Intro! Leatherworking has been a passion for many years and roughly 18 months ago I also started my own Business. I am from Germany, and luckily, we still have a very big Craft Fair culture (Kunsthandwerkermärkte) and I make most of my money there. I also sell online, but most of my business is in person. This year I also started my own Youtube Channel and make videos for the Patterns I publish. I love designing and making new products so creating and selling patterns was a perfect excuse to always come up with new product ideas. And next year, I will finally open my own store as well 😇 I have a lot of renovation to do over the Winter, but I feel so blessed and excited that I have the opportunity to have my own store. Here is also a Market of me at one of my Craft Fairs some months ago. Happy to be here and be more active in the Future Happy Crafting Josh

Hey I am so sorry, I thought I had my Notifications on, but did not, and totally missed the responses Thank you so much for the Input! I did end up making the repair myself, and it worked great. So also for confirmation in case someone else sees the post in the future, the steps and video worked perfectly for my Juki-LS341 and I did not even have to any realignment or change the needle timing.

Hello everyone, I bought a used Juki LS-341N for my Leather working Business 1-2 years ago, and it has been a great machine so far. Recently, I made a mistake when sewing thicker material, and it seems I have broken the tip of the Hook next to the Bobbin, so the hook does not properly catch the upper thread anymore. I have tried to resharpen and reposition it so it can catch the thread again, but to no avail. When I position the hole sled with the bobbin closer to the needle, the needle hits the side of the bobbin and is bent away from the hook. So it seems the Hook is too damaged that it could be fixed with sanding and readjusting. Luckily, the original seller sold me a new sled (the hole bobbin shuttle with the Hook). Now I have contacted a mechanic who would be able to do the replacement and service, but they have not been very responsive. (I am located in the Southwest of Germany and have not found other options except this person) So I am trying to evaluate how hard it would be to do this myself. Changing the part does not seem too difficult, but adjusting the needle hook timing and the exact hook position has very small tolerances, and I am not sure how well this can be done by an "amateur". Do you guys have experience with this, or could you give me an estimation of the difficulties and pitfalls of such a task? Any help and input would be greatly appreciated! Cheers Josh