The Ford Barn

Conaway2 · 11-14-2020, 12:52 PM

I’m rebuilding a stock A generator and am replacing the coils because the cloth (?) insulation has deteriorated and is falling off. The coils themselves seem fine - continuity tests indicate no broken windings.

if I decided to simply re-insulate the original coils, what should I use ? They appear to have been originally wrapped with some sort of cloth friction tape.

Thanks - Jim

KR500 · 11-14-2020, 02:56 PM

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There are a few different paper tapes that are used in the rebuilder's stock. I have used the 1/2 inch and 3/4 size with success. If you are sure each coil is not shorted and has continuity, great. Wrap the coils and secure the ends, after which coat or spray with an insulating coating such as McMaster Carr carries. I use an expanding tool inside the coils pressing them firmly against the generator interior, and then securing the field pole screws tightly with an impactor screw bit.

11-14-2020, 12:52 PM	#1
Conaway2 Senior Member Join Date: Apr 2019 Location: Mt. Pleasant, SC Posts: 601	Generator Field Coil Insulation I’m rebuilding a stock A generator and am replacing the coils because the cloth (?) insulation has deteriorated and is falling off. The coils themselves seem fine - continuity tests indicate no broken windings. if I decided to simply re-insulate the original coils, what should I use ? They appear to have been originally wrapped with some sort of cloth friction tape. Thanks - Jim

11-14-2020, 02:56 PM	#2
KR500 Senior Member Join Date: Mar 2012 Location: Addison,ll. Posts: 454	Re: Generator Field Coil Insulation Sponsored Links (Register now to hide all advertisements) There are a few different paper tapes that are used in the rebuilder's stock. I have used the 1/2 inch and 3/4 size with success. If you are sure each coil is not shorted and has continuity, great. Wrap the coils and secure the ends, after which coat or spray with an insulating coating such as McMaster Carr carries. I use an expanding tool inside the coils pressing them firmly against the generator interior, and then securing the field pole screws tightly with an impactor screw bit.