# Episode 38 - Ball Arch Cleaning **Source:** For Amusement Only EM and Bingo Pinball Podcast **Type:** podcast_episode **Published:** 2015-04-18 **Duration:** 5m 30s **Beat:** Pinball **URL:** https://foramusementonly.libsyn.com/episode-38-ball-arch-cleaning --- ## Analysis Nick Baldridge discusses cleaning the ball arch area on EM pinball machines, focusing on Gottlieb, Williams, Chicago Coin, and Bally games. He explains the four-piece metal construction of ball arches, the importance of cleaning lamp shields and diffusers, and advocates for preserving original plastic components rather than discarding them. The episode is part of an ongoing restoration project on a machine called GG. ### Key Claims - [HIGH] Lamps under the ball arch in metal rail EM games are typically 2-4 in number and are usually burned out — _Nick Baldridge describing typical EM pinball construction and lamp burnout patterns_ - [HIGH] Ball arch lamp shields deform or become filthy over time due to heat and airborne dirt accumulation — _Nick Baldridge explaining wear patterns on plastic diffusers and shields_ - [MEDIUM] Some restoration practitioners recommend discarding lamp shields because they're difficult to clean and don't look nice after cleaning — _Nick Baldridge referencing common practice among other restorers_ - [HIGH] Ball arches on Gottlieb, Williams, Chicago Coin, and Bally machines are assembled using the same basic four-piece metal construction — _Nick Baldridge describing standardized EM pinball manufacturing across major manufacturers_ - [HIGH] Cleaning rectangular metal pieces of the ball arch before reassembly prevents dirt from entering the machine — _Nick Baldridge explaining restoration methodology and quality standards_ ### Notable Quotes > "It's not perfect and it never will be, but it's a lot better than when I started." > — **Nick Baldridge**, opening > _Reflects realistic approach to EM restoration and acceptance of imperfection in restoration work_ > "There are some folks that recommend just pitching them because they're hard to clean and they don't really look nice when you're done. However, I really like the look of them. So I save them and clean them." > — **Nick Baldridge**, mid-episode > _Articulates personal restoration philosophy emphasizing aesthetic detail and preservation of original components_ > "That little extra bit of effort, I think, makes just a tiny bit of difference. Like on GG it has two clear or yellow plastic diffusers and then it got two red plastic diffusers. Well that kind of unusual." > — **Nick Baldridge**, mid-episode > _Demonstrates appreciation for subtle original details and mixed-color lamp shield configuration in specific machine_ > "It's one of those satisfactory, you'll know you did it things. No one else will care but it'll have that extra touch of quality just like Gottlieb used to say." > — **Nick Baldridge**, closing segment > _Reflects restorationist ethos of internal quality standards and tribute to manufacturing heritage_ ### Entities | Name | Type | Context | |------|------|---------| | Nick Baldridge | person | Host of For Amusement Only EM and Bingo Pinball Podcast, EM pinball restoration specialist and expert | | For Amusement Only | content | EM and Bingo Pinball Podcast focused on electromechanical and bingo pinball machine restoration, maintenance, and history | | GG | game | EM pinball machine currently undergoing restoration by Nick Baldridge, in-progress project featuring ball arch cleaning work | | Gottlieb | company | Classic EM pinball manufacturer whose ball arch construction standards are discussed | | Williams | company | Classic EM pinball manufacturer whose ball arch design is standardized with Gottlieb and other makers | | Chicago Coin | company | Classic EM pinball manufacturer with standard ball arch construction shared across industry | | Bally | company | Classic EM pinball manufacturer using standardized ball arch construction methodology | ### Topics - **Primary:** EM pinball restoration and maintenance, Ball arch cleaning techniques, Lamp shields and diffusers preservation - **Secondary:** Standardized EM pinball construction across manufacturers, Restoration philosophy and quality standards, Gottlieb legacy and manufacturing quality ### Sentiment **Positive** (0.82) — Nick expresses satisfaction with restoration progress, appreciation for original design details, and enthusiasm for preservation methodology. Tone is constructive and educational without criticism of alternative approaches. ### Signals - **[restoration_signal]** Detailed tutorial on ball arch disassembly and cleaning process for EM pinball machines, including component identification and assembly sequence (confidence: high) — Complete explanation of four-piece metal construction, lamp shield preservation methodology, and reassembly best practices - **[restoration_signal]** Restoration practitioner advocates for preserving and cleaning original plastic lamp shields rather than discarding them, valuing aesthetic and historical authenticity (confidence: high) — Nick Baldridge explicitly states he saves and cleans plastic diffusers despite difficulty because original mixed-color configuration adds value - **[content_signal]** Podcast approaching episode 50 milestone with host soliciting listener feedback on future content topics (confidence: high) — Nick mentions upcoming episode 50 and requests listener input on future topics - **[operational_signal]** Restoration project awaiting delivery of large parts shipment including bumper bodies, scheduled for arrival on Monday (confidence: high) — Nick notes waiting on parts shipment that includes bumper bodies, expected Monday delivery - **[content_signal]** Podcast focused on practical restoration education and community engagement with listener input on restoration topics (confidence: high) — Host encourages listener questions and feedback, indicates receptive to content suggestions --- ## Transcript what's that sound it's for amusement only the em and bingo pinball podcast welcome back to for amusement only this is Nicholas Baldridge another short one tonight as i am still in the thrall of cleaning gg however it's starting to come together and it's looking pretty beautiful at the moment. It's not perfect and it never will be, but it's a lot better than when I started. I'm still waiting on the large parts shipment that's mostly bumper bodies, but that's supposed to get here Monday, so today is Friday. In case you're curious and listening to this at a later date, I just realized that not and everybody probably listens to this every single day. It's always top of mind for me because, of course, I'm recording it. So today's topic is cleaning an EM, and specifically the ball arch area. So it's an easy place to forget because the ball never travels under it, but dirt does accumulate there and in many EMs and we talking about metal rail not wood rail but in metal rail games under the ball arch there are usually between two and four lamps And these lamps, I've never seen them where they weren't burned out. and they're usually covered by a lamp shield, which is either clear or red translucent plastic. Over time and via the heat from the lamps, these normally deform or just become absolutely filthy. And with the dirt that's flying around, they'll get just coated in nastiness. So there are some folks that recommend just pitching them because they're hard to clean and they don't really look nice when you're done. And all they're doing is really diffusing the light a bit. However, I really like the look of them. So I save them and clean them. And that little extra bit of effort, I think, makes just a tiny bit of difference Like on GG it has two clear or yellow plastic diffusers and then it got two red plastic diffusers Well that kind of unusual Normally they all one color They normally all yellow And that's a little accent that would be missing if I didn't, you know, retain those plastic clips. So when you take apart the ball arch on a Gottlieb game specifically, but this applies to Williams as well and Chicago Coin, most of the ball arches were assembled in the same way, and Bally as well. They're comprised of four metal pieces. One rectangular metal piece sits on the bottom between the playfield and the next metal piece, which is flat. and has the shape of the arch. This metal piece is shiny, it's chrome. Moving up, there's another rectangular metal piece, and then finally the arch cover itself, which is normally white. The arch cover has the rebound rubber and the ball gate or gates. Each piece is disassembled removed from the play field and then cleaned And it important to clean even those rectangular pieces before you put them back First of all they supposed to be shiny And secondly they'll still have dirt on them, which can get into the game that you just so meticulously cleaned. So it's worthwhile to do it. It's one of those satisfactory, you'll know you did it things. no one else will care but it'll have that extra touch of quality just like Gottlieb used to say so that's all for tonight just remember, keep those EM games clean and that'll keep them running my name again is Nicholas Baldridge you can email me at foramusementonlypodcast at gmail.com you can find us online at foramusementonly.libsyn.com and you can listen to us on iTunes, Stitcher, Pocket Casts, via RSS, or directly on our website, or even on Facebook. Just about anywhere. If there's somewhere where you'd like to listen to us and you can't, feel free to let me know. And feel free to reach out and let me know if there's anything you'd like for me to talk about. I've gotten some good feedback so far and I'd like to keep that train rolling, especially as we head into episode 50. thanks very much for listening and I'll talk to you next time _(Acquisition: groq_whisper, Enrichment: v3)_ --- *Exported from Journalist Tool on 2026-04-13 | Item ID: ecb810ce-991e-43aa-bb7c-11986c1405cf*