Dynamo rebuild - Printable Version +- Austinsevenfriends (https://www.austinsevenfriends.co.uk/forum) +-- Forum: Austin Seven Friends Forum (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=1) +--- Forum: Forum chat... (https://www.austinsevenfriends.co.uk/forum/forumdisplay.php?fid=14) +--- Thread: Dynamo rebuild (/showthread.php?tid=1833)

Dynamo rebuild - Nick Salmon - 04-10-2018 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.   P1100117.JPG (Size: 120.87 KB / Downloads: 337) 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.   P1100118.JPG (Size: 115.75 KB / Downloads: 333) 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?   P1100119.JPG (Size: 87.14 KB / Downloads: 331) RE: Dynamo rebuild - bob46320 - 04-10-2018 Follow this thread for the mechanical bits (Gears,bearings etc) http://www.austinsevenfriends.co.uk/forum/showthread.php?tid=1492&highlight=dynamo     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" RE: Dynamo rebuild - Nick Salmon - 04-10-2018 Thanks. Still need to know where those two wires need to go. RE: Dynamo rebuild - wild_willy - 05-10-2018 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 RE: Dynamo rebuild - Nick Salmon - 05-10-2018 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?