Juki lu 563 sound help

[friquant]

On 12/1/2025 at 12:37 PM, kamo48399 said:

recently I re-timed my Juki LU- 563 hook, after which the bobbin area began to make a grinding sound. Does anyone know what it might be? 

I just realized that you are running the machine under power without the throat plate in place. That is generally a bad idea as the machine could bind. I don't know if that will affect the sound

It's safe to turn by hand without the throat plate though

[kamo48399]

Thanks for letting me know about that I'll make sure to keep the plate on next time. I've tried separating the gears and turning both of them and they don't make the noise on their own so I'm pretty sure its the two gears. and the gears have changed from factory placement so that might be the source of the noise but I'm not sure how to change that.

[friquant]

1 hour ago, kamo48399 said:

and the gears have changed from factory placement so that might be the source of the noise but I'm not sure how to change that.

I have not done this, but this would be the process:

Mark your starting position on both gears. Slide the larger gear left, advance one tooth, slide it right, check for noise. Keep cycling through the teeth until you find the one that is quiet.

On mine (Singer 144) the smaller gear has 15 teeth, so that's 15 positions to check. But unless you did some screw swapping (set screw for position screw) I expect you to only need to go one tooth over to find the original position. 

 

[AlZilla]

That second video really doesn't have any sound that bothers me. Assuming the clacking sound is just the gears changing direction.

If you had to hop a tooth in one direction or another to get the hook timing right, then there's not much you can do about that. 

I suspect that sort of rushing sound when the gears are running will decrease, if it's a new noise.

This opinion is worth less than you paid for it, but that's what it looks like from here.

[kamo48399]

Thanks for the advice AIZilla, the second clacking sound is the gears changing and the case opener (I should have removed it for clarity) and moving a tooth is exactly what I had to do when timing it so maybe the sound is just the gears breaking in or something of the like. Nevertheless Friquants advice about putting the throat pate on when running the machine and marking the gears is still helpful for a novice like myself.

[friquant]

11 minutes ago, kamo48399 said:

moving a tooth is exactly what I had to do when timing it so maybe the sound is just the gears breaking in or something of the like.

You could do a bit of science here and move one tooth back to the original, to confirm that it's quiet in the original configuration and loud being one tooth off.

[kamo48399]

Thats a good idea. I'll do that tomorrow and let you guys know If that is the case.