Does this have 'auto threader' for lower looper?'

try contacting a janome dealer to see about the part

I have this serger, also. A friend (who knows sergers) and I spent 2 hours today trying to get the lower looper threaded--with no success! There is a diagram in the door of my machine, but it is still very confusing! I'm taking mine to the shop on Monday and have them thread it and show me how to do it!

From "Serge With Confidence" by Nancy Zieman:

Set the machine up for a 3-thread rolled edge. Normal width; length 1 - 2.

Use Woolly Nylon in the loopers & regular thread in the needle.

Lock or disengage the cutting blade.

Guide fabric along the right edge of the presser foot.

Stretch and equal amount from fron to back while serging.

Lower the differential feed, if available to about 0.6.

Serge at a slow to moderate speed.

Practice with scraps first.

After serging, gently stretch & release the fabric edge after serging.

Ok,... before you re-thread the loopers, always unthread the needles.Thread the needles last.

Here is a manual - http://ifixmachines.com/Janome-Model-634D/View-all-products.html

The thread guide should be inside the door.

Lift the antenna and presser foot. Turn the tensions to zero, if possible.

Turn the handwheel so the upper looper is at the highest point - there may be a mark on the side of the serger to align with a mark on the handwheel.

Begin threading from the right to the left, beginning with the lower looper.

Ooh, I've heard it is difficult timing a serger because there's more involved than a sewing machine.

You can try looking at videos and web sites:

serger timing Google Search

Check that your lower looper is actually threaded and not tangled with the upper looper (needle thread) when it moves. I wish they'd include pictures in the manual how to lay the thread.

hmm.. I could scan a copy of mine but there should be a guide on the inside of the front cover plate

Self threading is perhaps not exactly correct, however there is a guide with an armature to release the guide to enable easy access........have a look in you manual

Also take a look at this image and move the lever to use it.....all will be easier to see with the needle plate off ....until you become familiar with the operation

Yes, the model I used had a self threading lower looper. Just put the thread into the guide and flick the switch