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(Topic ID: 29731)

Vid's GUIDE To Rebuilding Pop Bumpers

By vid1900

11 years ago

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657 posts
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Latest reply 21 days ago by vid1900
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Post #183 Bally 80’s pop bumper rebuild Posted by vid1900 (9 years ago)

Post #407 Recommendation for stapler Posted by vid1900 (7 years ago)

Post #536 Link to a great video for people who are new to pop bumpers. Posted by Axl (5 years ago)

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#538 5 years ago

JLR

I did a playfield swap a few months ago for my High Speed and after dialing everything in, I noticed that there was some white flakey stuff around the pop bumpers. Investigation revealed that the metal ring posts are scraping the body on all three of them. I had replaced both the rings and the body (and of course, I don't have the originals to compare with). Has anyone ever seen that before... and what would the solution be? It looks like everything is assembled correctly, but there is definitely slop in the travel of the ring down the body and I could see how they would scrape. But I don't see what you can do to really prevent that. Is it just that the material of the body I purchased is too weak? Or the edges of the ring where the rods join the ring are too sharp? Seems like any contact would cause this, but I don't see the fix...

#541 5 years ago

JLR

jeffr

Pinside+ Frequent

7y 29,650 43

Quoted from Elicash:
This happened when I rebuilt my pops on BSD. The issue is with the quality of the after market pop bumper bodies. I would send a picture and a note back to the vendor you bought them from. I think I know where they came from.
After a hundred plays or so, the white dust will subside. It is just really annoying for awhile.
Or you could replace the bodies from a different vendor, but of course you will have to cut your lamp leads again which is a pain.
As mentioned by many earlier in this thread, quality of aftermarket parts has seemed to take a big hit in the past year or so. I think we as hobbyists need to be vocal to the vendors so they don't cut pennies on parts they are sourcing.

Yeah... I've got new bodies from pinballlife that look "better/different" and I'm going to replace them. The white dust isn't really subsiding, and the body structure is has been seriously compromised by the wear. Also noticed that I don't have washers between the rods and the mechanism. I'll be adding those too.

#545 5 years ago

JLR

jeffr

Pinside+ Frequent

7y 29,650 43

OP
Quoted from vid1900:
You probably need to rebuild the moving parts.
Every old part has a tiny amount of slop, and this adds up to a lot of slop (tolerance build up) - so much slop that the rings touch the body.
Even the coil stop might be worn at an angle, causing the new ring to rub.
Now with the plunger, both yokes, sleeve and washers replaced; manually work the popper, and make sure that the ring does not touch the body.
[quoted image]

Parts ordered... I’ll update after the full rebuild is done. Thanks!

1 week later

#549 5 years ago

JLR

jeffr

Pinside+ Frequent

7y 29,650 43

Quoted from jeffr:
Parts ordered... I’ll update after the full rebuild is done. Thanks!

Rebuild is installed, using new body repros from pinballlife. So far, no dust. Thanks.

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