Davidmadd Report post Posted October 23, 2022 Hi - Hoping for some advice regarding a Pfaff 341. When I recently bought it, it was supposedly working fine and in fairness it did stitch pretty well using lighter threads. 60s.........I noticed that the bobbin area appeared to be heavily contaminated with what looked very much like small paint chippings. I tried to clean it out with everything in situ but there were some I just could not get out. I washed it in paraffin, or kerosene, also used an air line to blow it out but in the end the only way to ensure it was clean was to remove the mechanism in and around the bobbin. This machine is driven by a right angled bevel gear and the drive to the bobbin/hook assembly looked worn but I just could not find a source of supply for replacement items. Nor could I find an adjusters manual for this machine. All I have found is a parts list and a user instruction manual. I cleaned everything out and inspected each part and re-assembled. Somewhere along the line I appeared to have upset the adjustment of the feed dog. This is a needle feed machine but without the walking foot. The machine does stitch but on max stitch length ( should be 4.5mm) it only produces stitches quite a bit smaller, probably about 3mm. When the material is being fed through, instead of being a continuous feed in one direction the fabric seems to start moving backwards in the first instance before being moved forward. I'm trying to sew using Bonded Nylon 40s thread here....Its just not obvious to me which of the screws in that area would be the one to use to overcome this so I'm appealing for help to the community, hoping someone out there may have some experience of this or a similar machine. I think the Pfaff 141 is similar but a flat bed model and not a cylinder arm. So does anyone have knowledge that might help, anyone have an adjusters manual or perhaps point me in the right direction as to where the adjusting mechanism is, Im assuming it needs a collar to be slackened off and a part rotating shaft to be slightly moved but which one???? On the same machine, as I turn it by hand, to try and watch the movement of the feed dog, the hand wheel will suddenly become quite tight...by backing off the handwheel very slightly it then continues to turn smoothly. I just cant ascertain which area is causing the stiffness and it appears to be random. I dont know if it is once again in the area by the bobbin/hook. If it is in the bevel on the other end that drives the hook bevel, or is is in the top of the head by the needlebar or in the mechanism inside the casing by the handwheel....all leaving me somewhat perplexed!!!!!! Quote Share this post Link to post Share on other sites
Wizcrafts Report post Posted October 23, 2022 I found these manuals for the Pfaff 341 series. There are different types of feed on sub-classes. One I uploaded and the other is on ManualsLib.. https://www.manualslib.com/products/Pfaff-341-8830949.html Pfaff_341.pdf Quote Share this post Link to post Share on other sites
Davidmadd Report post Posted October 24, 2022 Many thanks Wizcrafts. These are the two manuals that I have already managed to find, but they are not adjusters manuals. Pfaff produced great manuals for some of their later machines but the 341 was not one of them and there is very little info around and indeed the same for spares. It came to me with one presser foot and there are just none available. It uses an Extra High Shank foot. I think it never sold in great numbers and the spares availability seems to support this. In truth I thought I was buying the Pfaff 355 which is a walking foot as well as needle feed and there are plentiful supplies of spares around for that machine. In order to cure the intermittent seizing up I'm afraid I will need to strip it down a lot more but would really like a bit more information on setting it up before I go too deep into the strip down. I note that there is a rocking shaft attached to each end of the feed dog and when the stitch length adjust lever is moved I can see which shaft moves and which way the shaft turns to increase the stitch length so I can work on that aspect to properly set the stitch length, probably by trial and error. But many thanks for your reply and taking the trouble to seek out those elusive manuals, it is much appreciated.... Quote Share this post Link to post Share on other sites
shoepatcher Report post Posted October 24, 2022 Look for a mechanics manual for the Pfaff 345. The 341 was in this family of machines glenn Quote Share this post Link to post Share on other sites
