Dynamo rebuild

[Nick Salmon]

Am attempting rebuild of late C35A dynamo that previous owner stripped down and left in a box of bits. I have no idea what he butchered/snipped. (Bear in mind that I don't really do electrickery. My understanding is limited to: Thing works=Good. Thing doesn't work=Bad. Thing smokes and catches fire=Very Bad).

I have just fettled a less deconstructed C35M (following the Cornwall A7 club notes on testing etc) and it's now working fine - but the connections are a little less obvious on the A.

I appear to have two wires from the field coils , the red one (ignore that it is poking out of the casing) and and bare one - there is continuity between them.

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I know that one brush is to earth and I have identified which one it is.  The other brush presumably has a wire from it to the POS/D external terminal.  Then the smaller, moveable, third brush is connected to the field coils and then to the F2 external terminal.

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But I  have two wires from the coils, the red and the bare. Which goes where?

I need to get hold of a few small bits - a brush spring, the two screws that hold the shoe plates in place between the coils, a woodruff key for the drive end, and a spring to hold the end cap in place. Any ideas where they might be obtainable?

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[bob46320]

Follow this thread for the mechanical bits (Gears,bearings etc)

http://www.austinsevenfriends.co.uk/foru...ght=dynamo

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    Also,  it should look like this, remove the paint from mating surfaces as that will throw the bearings out of alignment and worse case prevent flow of "eletrickery"

[Nick Salmon]

Thanks.

Still need to know where those two wires need to go.

[wild_willy]

The field connection poking out of the casing goes to the F terminal. The other end of the field winding goes to the 3rd brush. The insulated larger brush goes to the D terminal via a short piece of wire. By the way if you can find a C35M end plate with the later brushes it will fit straight on the C35A dynamo. Might make finding brushes etc a bit easier than the missing C35A stuff.
Good luck

[Nick Salmon]

Thanks Wild Willy. That's really helpful, especially the tip about using a 35M end plate. All is now clear.

Next question: Might anyone have a surplus 35M endplate they would part with?