spotty Report post Posted December 13, 2015 I've obtained a 112w140 sewing machine and trying to get it working byt the tensions disks do no appear to release when the presser foot is lifted. I can't find an exploded view of how this linkage works on this machine and think I maybe missing something. Can anyone share any more light about the parts or diagram of how this linkage works. Quote Share this post Link to post Share on other sites
Uwe Report post Posted December 13, 2015 Not 100% sure about this particular machine and tension unit, but there's usually a relatively big pin that pushes from the back of the machine, through the machine and onto a plate on the back of the tension unit. That plate in turn pushes on a teeny-tiny pin that finally pushes one of the tension discs away from the other. It's a surprisingly complex mechanism. I had one machine where the teeny-tiny pin was missing. That pin is so tiny most people wouldn't even notice it falling out if they disassembled the tension unit. I made a replacement pin by cutting a very thin nail to the right length and smoothing the ends on sandpaper. You can buy a complete tension unit for under $20 on ebay. Keep that in mind as you run up hours trying to fix yours. Quote Share this post Link to post Share on other sites
spotty Report post Posted December 13, 2015 Thanks. Thats what I was trying to figure out and now I'm trying to work out what the parts I need. I guess that the part is missing as it there doesn't appear to be a big pin/rod although there is a hole through the machine just behind the tension unit which certainly looks like it would function as described. Quote Share this post Link to post Share on other sites
sandyt Report post Posted December 13, 2015 Do the disks move at all? Are they installed in the whright order? Made that mistake a time or two with my firt machines. I replaced my lost pin using a needle wich I cut the wright length. And polished the ends. Quote Share this post Link to post Share on other sites
Darren Brosowski Report post Posted December 13, 2015 Sorry, but on the scale of sewing machine problems it is a non-event. Pull the assembly apart, clean everything. make sure that there is a pin to release the tension - not hard to follow the mechanics - then reassemble and ensure that the tension assembly is properly seated. Quote Share this post Link to post Share on other sites
CowboyBob Report post Posted December 13, 2015 You can make a pin out of a nail,it needs to be 57mm long.You can bend the bracket on the back of the tension unit to adjust it. Quote Share this post Link to post Share on other sites
