(Topic ID: 269355)

Strange Stuff on coils

By Frogger1108

2 years ago



Topic Stats

  • 10 posts
  • 9 Pinsiders participating
  • Latest reply 2 years ago by KenLayton
  • Topic is favorited by 1 Pinsider

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#1 2 years ago

Hi,
i just got an old "Crazy Race" from Recel. I worked on EM Recels before, so I was surprised when I opened it and found that all the coils had this white stuff on them.
Does anybody know what it is, is it eventually even dangerous (asbestos comes to mind)?

Thank you

WhiteStuff1 (resized).jpgWhiteStuff2 (resized).jpg
#2 2 years ago

Looks like caulking, perhaps to reduce the vibration of a wire getting broken off?

John

#3 2 years ago

Silicon caulk can be used as an electrical insulator after it has fully cured. Interesting location to use it.

#4 2 years ago

I've got a Black Jack with similar looking stuff all over it. Never figured out why

#5 2 years ago
Quoted from zacaj:

Never figured out why

Ops often did things to lessen service calls on location games. One local op years ago would unsolder every wire to every coil lug and put heat shrink tubing on the wire, solder it back on. Then heat the tubing.

Rarely had a wire break off service call.

This seems like an attempt at the same thing. Only easier and less time consuming.

LTG : )

#6 2 years ago
Quoted from LTG:

Ops often did things to lessen service calls on location games. One local op years ago would unsolder every wire to every coil lug and put heat shrink tubing on the wire, solder it back on. Then heat the tubing.
Rarely had a wire break off service call.
This seems like an attempt at the same thing. Only easier and less time consuming.
LTG : )

It doesn’t cover the areas where the wires are soldered though.

I wonder if you peeled the caulk away you wouldn’t find that the plastic is cracked or broken and that’s reinforcing it.

#7 2 years ago

The caulk/RTV/Silicone added as shown is to prevent the solenoid winding wire from breaking off near the power wire lugs/tabs. How many times have we all had to repair the thin one on the center lug on an early SS Bally flipper coil? Or just replace the coil?

#8 2 years ago

Thank you all for your replies. I'll just leave it where it is then, I just wondered if it was a Recel thing or if some operator "tuned" his machine along the road.

#9 2 years ago
Quoted from LTG:

Ops often did things to lessen service calls on location games. One local op years ago would unsolder every wire to every coil lug and put heat shrink tubing on the wire, solder it back on. Then heat the tubing.
Rarely had a wire break off service call.
This seems like an attempt at the same thing. Only easier and less time consuming.
LTG : )

I know an old operator who told me he had to do that on every solder connection on some of the earliest gottlieb system 1 games when they first came out since they kept coming apart on a regular basis.

#10 2 years ago

Yeh, that looks like an operator squirted on some silicone caulking to prevent wire breakage service calls.

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