I can't figure out how to replace the needle on a Juki MO-3314E industrial serger
There should be a lever (probably black) at the back left side of the machine. When you push down on it (strongly) it should release the whole foot to swing out left from the machine. I think that model has its needle holding screws on the front and you will probably need a small allen wrench / needle wrench to unscrew that small needle screw. I could be wrong. Sometimes they are just a regular needle screw that is unscrewed with a small screw driver.
Unscrew the needle screw and take the old needle out. Try not to drop it into the machine because this can start a whole new set of problems. You can use tweezers or needle nose pliers if it is hard to hold on to it. I think that this model takes a B-64 needle and probably either a 12,14,16,18 size. Use the size that was already in it if you know. If you don't know, you may be able to read it on the top of the old needle (you may need a magnifying glass if it is pretty worn).
Put your new needle into the hole where the old one came out, making sure that the 'eye' of the needle is straight forward or it will not make good stitches. You may already know this, but just in case you don't, the front of the needle is the side that has a groove straight down the front of the needle to the hole so that the thread can run down it to the eye as you sew. If you put the needle in backwards, it will probably not make stitches.
Make sure that the needle is as far up into the hole as it can go and tighten your needle screw. Thread your needle (s) and lay the thread ends towards the back of your machine. Now, make sure that the threads from the loopers are coming directly from the eyes of the loopers, not tangled up with each other and lay those thread ends towards the back of the machine.
Turn the handwheel on the right side of your machine forward until the needles are as high as they are going to go.
Now, push down on the black lever on the back of the machine and swing your foot back into place. Before you try to run it, make sure that the foot is 'locked' in place. You can assure yourself of this, by trying to wiggle the foot from left to right. It should not move from left to right when locked into place. Now turn your handwheel forward again slightly to make sure that your needles are not going to hit the foot. If all is well, run a small piece of fabric through the machine and check the stitch.
Jun 26, 2014 |
Juki 6716 Mechanical Sewing Machine