Vid's GUIDE To Rebuilding Pop Bumpers

(Topic ID: 29731)

Vid's GUIDE To Rebuilding Pop Bumpers


By vid1900

6 years ago



Topic Stats

  • 535 posts
  • 135 Pinsiders participating
  • Latest reply 9 days ago by LynnInDenver
  • Topic is favorited by 593 Pinsiders

You

Linked Games

No games have been linked to this topic.

    Topic Gallery

    There have been 127 images uploaded to this topic. (View topic image gallery).

    20181117_191430 (resized).jpg
    20181117_191427 (resized).jpg
    F015B713-8F83-4811-BD94-8A6C9E54BA62 (resized).jpeg
    E8DCAF43-C631-4F75-906E-F6DEB8E063E4 (resized).jpeg
    B57C7E86-9AFC-492F-9244-65367B8A262F (resized).jpeg
    20180616_170238 (resized).jpg
    IMG_2981 (resized).JPG
    IMG_3815 (resized).JPG
    20180110_093330 (resized).jpg
    20180110_092110 (resized).jpg
    20180110_092030 (resized).jpg
    20180109_213956 (resized).jpg
    20180109_141056 (resized).jpg
    20180109_141130 (resized).jpg
    20180109_141206 (resized).jpg
    44CD94CD-687D-489D-B32C-5D3B2006FC39 (resized).png

    There are 535 posts in this topic. You are on page 11 of 11.
    #501 10 months ago
    Quoted from Rdoyle1978:

    Seems like the only way to go - you don’t want to loosen those nuts, as they will definitely fall off

    Three washers seems to have fixed the issue -- thanks! Another trick to file away.

    1 month later
    #502 8 months ago

    I have a question about my globetrotters. I pulled the 3 pop bumpers off for cleaning and I noticed that the center one appears to be missing the screws that would hold it in place. But I am scratching my head how they could have been sheared off so perfectly without any other damage so I wanted to double-check that in fact this is bad and needs to be replaced!

    IMG_2981 (resized).JPG

    #503 8 months ago
    Quoted from mark532011:

    I have a question about my globetrotters. I pulled the 3 pop bumpers off for cleaning and I noticed that the center one appears to be missing the screws that would hold it in place. But I am scratching my head how they could have been sheared off so perfectly without any other damage so I wanted to double-check that in fact this is bad and needs to be replaced!

    Yup, it's done. I've had several with one sheared, but not both. Replace it and any other worn parts.

    #504 8 months ago
    Quoted from mark532011:

    I have a question about my globetrotters. I pulled the 3 pop bumpers off for cleaning and I noticed that the center one appears to be missing the screws that would hold it in place. But I am scratching my head how they could have been sheared off so perfectly without any other damage so I wanted to double-check that in fact this is bad and needs to be replaced!

    Yep replace ‘em. Make sure you polish the hell out of them before you install them. I’ve had a couple games with this situation. I can only
    Assume the vibrations eventually just shear the ends off

    #505 8 months ago

    VERY easy to over-tighten as well.
    Please do NOT ask me how I know this.
    -mof

    #506 8 months ago

    Yep, if you make them more than snug, they sheer right off.

    1 month later
    #507 7 months ago

    vid1900 - I know it's been said many times, but your tutorial was indispensible for my pop bumper rebuild on SM! Thanks so much for spending the time to help the community. My pop bumpers are rockin! I would have never had the confidence to take this on blindly... (nor know about polishing the rings, etc...)

    Now for the embarrassing part: I had 2 screw left... Not good. Still trying to track down where these go. (Pretty sure they're not part of the pop-bumpers, but something else i needed to tear down in the process. The joys of being a pinball newbie!!!

    20180616_170238 (resized).jpg
    #508 7 months ago

    That is from Stern Spiderman? I don't think they are from the pops.....

    #509 7 months ago
    Quoted from vid1900:

    That is from Stern Spiderman? I don't think they are from the pops.....

    Yes, apologies for being vague. Stern Spiderman. Agreed, I don't think they're from the pops. I'm beginning to think it's a coincidence. Is it possible the switches for sandman just need to be replaced?

    #510 7 months ago
    Quoted from Broohaha:

    Is it possible the switches for sandman just need to be replaced?

    Go into Switch Test and see what you got.

    1 week later
    #511 6 months ago
    Quoted from vid1900:

    Go into Switch Test and see what you got.

    Looks like it was the optos up in the sandman area. A light cleaning has greatly reduced the frequency. Need to find the time to do it properly... Thanks for the advice!

    2 months later
    #512 4 months ago
    Quoted from bflagg:

    Thanks for the polishing tip. I would have never thought of it, but it makes them so much smoother.

    [quoted image]

    I'm sure it states it somewhere but, what should I polish these with?

    #515 4 months ago
    Quoted from mollyspub:

    Thanks! Can I use a metal liquid polish instead?

    You can, but you'll have to sand through 2000 grit first.

    #516 4 months ago
    Quoted from mollyspub:

    What do you mean by sanding through 2000 grit? Are you referring to the type of sandpaper?

    Yes.

    Sand 240, then 500, then 1000, then 1500 then 2000 grit sandpaper.

    At that point you can probably get a mirror finish with Fritz.

    1 month later
    #517 88 days ago

    Hey vid, do you know what yoke fiber is made of, and where I can buy a small sheet of it? Or what exactly that material is called? I have an 80 year old companion electric motor that uses a small sample of similar material inside of it, that’s broken. I’m trying to fabricate that sample, and replace it. I’m in process of restoring it back to its glory days . Any info will help. Thanks

    #518 88 days ago
    Quoted from s2k4ary:

    Hey vid, do you know what yoke fiber is made of, and where I can buy a small sheet of it? Or what exactly that material is called? I have an 80 year old companion electric motor that uses a small sample of similar material inside of it, that’s broken. I’m trying to fabricate that sample, and replace it. I’m in process of restoring it back to its glory days . Any info will help. Thanks

    I believe fibre yokes are bakelite. e.g. http://www.actionpinball.com/parts.php?item=545-5609-00U

    #519 88 days ago

    Bakelite was an early plastic/resin material. Those fiber yokes and plunger links are something else.

    #520 88 days ago
    Quoted from ForceFlow:

    Bakelite was an early plastic/resin material. Those fiber yokes and plunger links are something else.

    But everyone calls them bakelite, like sometimes people call vacuum cleaners are Hoovers or all glass cleaners Windex? Ok. I can only go off what people call the stuff, like in the pinrepair guide he explicitly says he used Bakelite to make a flipper link (http://www.pinrepair.com/em/emflip2.jpg), and it looks the same as the material I have for older fibre yokes.

    Given s2k4ary is working on something that's 80 years old, isn't bakelite still a likely candidate?

    #521 88 days ago
    Quoted from ajfclark:

    But everyone calls them bakelite, like sometimes people call vacuum cleaners are Hoovers or all glass cleaners Windex? Ok. I can only go off what people call the stuff, like in the pinrepair guide he explicitly says he used Bakelite to make a flipper link (http://www.pinrepair.com/em/emflip2.jpg), and it looks the same as the material I have for older fibre yokes.

    Right, sometimes terminology is misused, such as battery "acid".

    Examples of actual bakelite: https://www.realorrepro.com/article/Is-it-Bakelite

    PBResource offers lengths of the fiber link material for sale--they might know the proper term for it.

    http://pbresource.com/tools.html#Material

    #522 87 days ago

    Thanks guys, your information was very helpful. I will look into links you provided to find similar material for my project. It’s part of restoring a 1936 Delta Drill press that had a Companion motor on it ( not sure why ). Fun stuff.

    B57C7E86-9AFC-492F-9244-65367B8A262F (resized).jpegE8DCAF43-C631-4F75-906E-F6DEB8E063E4 (resized).jpeg
    #523 87 days ago

    Every fair sized city has a motor rewinding shop, they will probably just give you a scrap of bakelite (if you tell them about your 30s drill press).

    OTOH, although it's certainly fun to restore an old motor like that, you may just want to let them fix it.

    They have a high voltage Surge tester that can find tiny breaks in the winding insulation that you would not be able to find at home.

    Most motor joints will test, terminate and replace the bearings for ~50$

    Find the shop in the worst part of town, not the fancy industrial park, for the best price/service.

    #524 87 days ago

    Great idea, thanks for the input Vid.

    #525 87 days ago
    Quoted from vid1900:

    Find the shop in the worst part of town, not the fancy industrial park, for the best price/service.

    https://mx.easa.com/MemberLookup/Active?

    2 weeks later
    #526 71 days ago

    vid1900 pop pinup

    Polished vs. original

    #Whirlwind rehab in progress

    F015B713-8F83-4811-BD94-8A6C9E54BA62 (resized).jpeg
    4 weeks later
    #527 42 days ago

    Can you help me understand when pop rings needs to be replaced? Mine seems always ok! Can I try this method of polishing on my old rings also? Thanks

    #528 39 days ago
    Quoted from Pesmerga:

    Can you help me understand when pop rings needs to be replaced? Mine seems always ok! Can I try this method of polishing on my old rings also? Thanks

    Bump

    Also I'm rebuilding my BSD bumpers right now but they seems too high when assembled..am I doing something wrong?? Parts are new as from manual and bought from best of pinball here in Europe..they are still not fixed to the pf by the screws but they seems too high anyway to me!

    20181117_191427 (resized).jpg20181117_191430 (resized).jpg
    #529 39 days ago

    In my (brief) experience, pop bumper bodies and rings don't need to be replaced unless they are broken.

    I recently rebuilt my BSD pops and the new bodies from Marco were very inferior. After the rebuild, every time the pop was actuated the ring would shear off a tiny dusty shards of the plastic. the whole pop bumper area become covered in white shards and dust.

    I ended up cleaning up the old bodies and using the whitening technique with peroxide and sunlight.

    As far as rings go, if they're not bent or broken, why replace? Just clean and polish. I have read a million posts from people lamenting after-market metal parts that are totally inferior to the old original items. I have had this experience with flipper rebuilds, post screws, etc. not to bag on marco or pinball life, but I just dont think the new metal parts are made as well as NOS or just old parts that are not worn.

    #530 38 days ago
    Quoted from Elicash:

    In my (brief) experience, pop bumper bodies and rings don't need to be replaced unless they are broken.
    I recently rebuilt my BSD pops and the new bodies from Marco were very inferior. After the rebuild, every time the pop was actuated the ring would shear off a tiny dusty shards of the plastic. the whole pop bumper area become covered in white shards and dust.
    I ended up cleaning up the old bodies and using the whitening technique with peroxide and sunlight.
    As far as rings go, if they're not bent or broken, why replace? Just clean and polish. I have read a million posts from people lamenting after-market metal parts that are totally inferior to the old original items. I have had this experience with flipper rebuilds, post screws, etc. not to bag on marco or pinball life, but I just dont think the new metal parts are made as well as NOS or just old parts that are not worn.

    I also think that replacement are not as good as original.. maybe this length problem in my bumpers is due to this too.. do you know if there is some way to solve it?

    3 weeks later
    #531 13 days ago

    Guys, recently rebuild the pops on my BSD..

    Not getting great action and I think the leaf switch is worn. So I am going to replace this (and the spoon, which I skipped).

    Can someone point me to the part number for this leaf switch in WPC? I cannot find in my manual or on Marco Specialties site.

    Thanks!

    #532 9 days ago

    Oh dear, I have broken bumper skirts on my Dr Who and somehow imaged they would be a lot easier to swap out than what it appears it will actually take from reviewing this thread. May have to shelf that idea for a later date...

    Great guide vid1900 !

    #533 9 days ago

    Yep neemypeemy broken skirt = bumper rebuild!

    #534 9 days ago

    If your pops are sluggish, be sure the cup is clean! I have found sludge and grease in the cups. If you are not changing them be sure to clean them with 90% isopropyl alchohol.
    They are horizontal and have a hole above them.
    Crud affects the post.

    #535 9 days ago
    Quoted from PinballAir:

    If your pops are sluggish, be sure the cup is clean! I have found sludge and grease in the cups. If you are not changing them be sure to clean them with 90% isopropyl alchohol.
    They are horizontal and have a hole above them.
    Crud affects the post.

    Additional: sufficient crud in the cup can cause the coil to "lock on" with EM style pop bumpers (like used on Gottlieb System 1) - basically, the skirt "jams" on the crud and effectively sticks the switch closed.

    Promoted items from the Pinside Marketplace
    € 222.00
    Cabinet - Decals
    Buthamburg
    £ 31.00
    Lighting - Led
    PinballToys
    From: $ 180.00
    $ 18.99
    Eproms
    Matt's Basement Arcade
    $ 89.95
    Cabinet - Shooter Rods
    Super Skill Shot Shop
    € 95.00
    Lighting - Led
    FlipperLED
    $ 79.95
    Cabinet - Shooter Rods
    Super Skill Shot Shop
    $ 119.95
    Cabinet - Shooter Rods
    Super Skill Shot Shop
    From: $ 15.00
    Electronics
    nvram.weebly.com
    $ 15.00
    $ 19.99
    Playfield - Plastics
    Docquest Pinball Mods
    $ 69.99
    Playfield - Toys/Add-ons
    Lighted Pinball Mods
    $ 49.99
    Playfield - Toys/Add-ons
    Lighted Pinball Mods
    $ 125.00
    Cabinet - Shooter Rods
    Super Skill Shot Shop
    $ 29.99
    Cabinet - Sound/Speakers
    Lighted Pinball Mods
    $ 49.99
    Playfield - Toys/Add-ons
    Lighted Pinball Mods
    From: $ 99.99
    Cabinet - Other
    Lighted Pinball Mods
    $ 45.99
    Eproms
    Matt's Basement Arcade
    £ 32.00
    From: $ 42.00
    Cabinet - Shooter Rods
    ModFather Pinball Mods
    From: $ 185.00
    Gameroom - Decorations
    Pinball Photos
    From: $ 9.99
    Eproms
    Matt's Basement Arcade
    There are 535 posts in this topic. You are on page 11 of 11.

    Hey there! Got a moment?

    Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside