Hello,

With my bar closed, GnR SE is out on rental now and it’s my second service call tomorrow with the spinning disc. The ball was getting stuck on the post on the disc, so I adjusted the height to be flush with the playfield.

It seemed to be better but I couldn’t figure out how to stabilize the side to side wobble. The client just let me know that balls are still getting stuck (it’s been a few weeks since my last service call). This is an early production machine from the first run of standards.

How can I fix this for good?
Thanks in advance!

CD82BB49-4824-4607-8DAF-DC0080675C42 (resized).jpeg

Just circling back here in case anyone has the same problem.
Thanks a lot for the advice.

In my case it was the #16 top side screw.
I had to pierce the decal to tighten it and then re-adjust the height of the disc since the disc was now sitting higher that it should with everything tight.

Hopefully it doesn't work its way loose again. If it does, I guess you have to use the 425 loctite?
I ordered some for the bottom screw but it had it applied from the factory and it makes it impossible to remove the screw from the shaft. I guess I'm worried if I put it on the top screw I won't ever be able to remove it.

That’s what I had done at first and it slowly worked its way loose again. I don’t think you can properly tighten the top screw without a small philips. If you push on it hard with your finger while screwing the bottom nut you will still feel the top screw spinning. Once I tightened it from the top the wobble was totally gone.

Before:

EAEFE37E-DB96-4FF1-85E2-7E801193FD3C (resized).jpeg