I need instructions on replacing the thread take up spring Juki DDL 8700

Take up spring is very important. theres a screw on the right side of the post located on machine body. loosen and remove entire tension device. don't lose the tension pin in the center. now look at the tension post and you will see a small screw that when loosened will allow u acess to the take up spring. study the way the spring in place.the end of the take up spring fits in a slot on the post. remove old spring and slide in new one making sure the free end of the spring goes in the slot on post, put the other piece back on and twist till u have med. tension on the spring them tighten the screw, put tension pin back in center of post and slide device back in machine. take up part should be arounf 10 oclock. tighten screw to hold tension device. u can change the spring tension by putting a screwdriver in the slot where the tension screw is located. turn right for more tesion. sorry but this is a hard repair to put in writing because its simple but requires ome experience.

Contact a juki dealer to see if they can give instructions