Adler 69 - weird sound (video)

[Leatherbag]

Hello everyone,

about 3 months ago, I purchased an Adler 69-373, which looks like new and it seems that it was almost never used before. It came with a clutch motor which I changed to a servo motor.

Now that the silent motor is build in, I hear that it makes an awful sound when the presser foot moves, please find here a video:

https://vimeo.com/350508735

I oiled everything and removed some parts of which I believed they could cause the sound, but I still could not find a solution. By now, I think that the sound is caused either by a bent presser foot bar (which optically looks perfectly straight though) or the general lifting force. It definitely comes from the movement of the presser foot - when the presser foot is not moved, but the upper feed and the needle move, the sound is not there.

In the service manual (see attached picture), I found a part that seemed to fit perfectly my problem (it says that roller 4 must lie tight on the sliding piece 5 in order to prevent a kind of growling sound when the presser foot moves), but no matter how I position the sliding piece, the sound is still there.

Now I am afraid that the whole construction or the cast body is somehow distorted and that leaves me pretty frustrated - finally having such a beautiful machine that makes this awful sound and I cant find a solution for 5 full days

So I really hope that you guys can help me and Ms. Adler

 

[Mark842]

Had a sound similar to that On one of my machines a few years back. Turned out it was the feed dog rubbing on the side of the slotted plate. Have you tried checking that yet? I remember I checked everything up top swearing that was where the sound was coming from and as a last ditch effort loosened the screws on the plate and poof..plate moved, sound gone.

[Leatherbag]

Hi, thank you.

I already checked that, but the sound comes from the upper part and has something to do with the parts that move when the presser foot goes up and down. I marked the area of which I think that there is the source of the sound. If I turn the handwheel and come to the point when the presser foot is lifted, it gets pretty hard to turn it and the sound starts.

[Leatherbag]

Hello,

still looking for a fix for this weird sound.
Does anyone (maybe someone with an Adler 69-373) know, if its normal that the gray part (I marked it orange in my previous post) moves a bit to the sides while going up and down? Please find a video here: https://vimeo.com/350731298

I think that somehow this gray excenter is pulled or pushed by something else out of its position but I cant figure it out.

It would help me a lot if someone with an Adler 69 (or a similar 67) could have a look at my latest videos (https://vimeo.com/user98044619) in order to tell me if there are some unnormal movements that could cause the sound. Of course I can comment on the videos if you need more info.

Thank you very much in advance,

best wishes from Germany!

[Wizcrafts]

That's definitely not according to Hoyle! Something has come loose or unscrewed, or out of its bearing.

[chrisash]

On your video the bar that moves up and down on the left where it goes into a vertical block with two screws has a worn surface just showing where the bar enters the block

[Leatherbag]

4 hours ago, Wizcrafts said:

That's definitely not according to Hoyle! Something has come loose or unscrewed, or out of its bearing.

Thank you very much! I cant figure out which part could be loose. When I check by hand, everything is very tight, but somehow as soon as the excenter moves up and down something pushes or pulls it out of position. Maybe its the silver joint because it also moves a little bit. But I cant figure out how to check that safely. I am pretty afraid that its something that can not be repaired :/

58 minutes ago, chrisash said:

On your video the bar that moves up and down on the left where it goes into a vertical block with two screws has a worn surface just showing where the bar enters the block

Thank you very much! Do you mean this part on the machine itself (please see photo)? I just polished that area very slightly because I thought that the bar would rub on the machine, but I am pretty sure it does not. Or do you meant something else?

So I'd really appreciate any more hints what to check....

Edited July 30, 2019 by Leatherbag

[paloma]

Hello,

i dont know if it can help, but mine ( exactly the same model ) songs very differently , there is something anormal in your.

[Leatherbag]

Hi Paloma,

thank you very much! Can you tell me if the excenter moves also to the sides at yours? At mine, it moves very slightly and the silver joint also moves. Dont know it that has something to do with the noise or if this slight movement is just normal? That would help me a lot!

[RockyAussie]

I have been looking at my 69-372 for a good while now and although I found 3 hornets nest in it, it does not make any similar sound. I did have this problem on a Pfaff 335 I think and the answer was that the back presser bar was lightly bent. On that machine I found I had to find a loose spot in the adjustment of the presser tension tube and I was able to get away with that. I would think it is possible that your presser bar is bent or the top tube has been bashed or more likely the bottom of the bar at the foot has been bashed. I did notice in your first video 23seconds in ,that the appeared to be some heavy scouring on the back of the presser shaft.