The service manual sheet mentions an insulator sheet (paper?) that goes between the large sheet metal cover and the underneath of the switch.
I don't know if I ever opened up a O22 switch and found that insulator.
What should I make them out of?
Thank you.
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I have used manila file folders.
It is my understanding some switches had them and some were manufactured without.
They eliminated them in later versions as they felt they weren't necessary. If the wires and tabs are tucked into the Bakelite base, it isn't needed, but if you want to make one, a manila folder, as CW suggested, or a brown paper bag works too.
The risk if it's not there is that if the non-derailing link on the curved turnout rail fractures it's solder joint on the underside (as they are prone to do), then it can drop and short to the baseplate causing the mechanism to always want to be in the turnout position. If this happens there is no choice other than tear the switch out for repairs. 😫
Rod
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