21-12-2021, 05:55 PM
Having successfully found broken wire on the dynamo, the "easiest" (ha ha) solution was to change out the damaged item and replace it with a recently refurbed dynamo, simples!
All went back together well and even got the timing reasonably accurate for the engine to start and run on about the third pull which is normal for Ruby, she ran fairly lumpy but most disturbingly there was a distinct, never heard before, rattling emanating from the the front of the engine.
I adjusted the timing until the engine ran fairly normally but still this rattle from the front end which even my good lady commented on.
I was pretty convinced it was from the front end and not having had the rattle before, decided it had to be to do with the new unit and so removed the dynamo and compared drive gears.
The attached photo shows the original dynamo right and the re-conned version on the left and to me it is clear that the width of the teeth at their outer edges on the original are significantly thicker than those on the re-conned unit, which to me would mean the teeth would be a loose fit in the mating gear, hence the rattle??
Am I right in thinking that this would cause a rattle and am I right in thinking that I should be ok to change the gears over to run with the re-conned dynamo but with the old drive gear??
Sorry the pic is on a word doc but cannot seem to get pics on the site as the files always appear to be too large.
Cheers Denis S
All went back together well and even got the timing reasonably accurate for the engine to start and run on about the third pull which is normal for Ruby, she ran fairly lumpy but most disturbingly there was a distinct, never heard before, rattling emanating from the the front of the engine.
I adjusted the timing until the engine ran fairly normally but still this rattle from the front end which even my good lady commented on.
I was pretty convinced it was from the front end and not having had the rattle before, decided it had to be to do with the new unit and so removed the dynamo and compared drive gears.
The attached photo shows the original dynamo right and the re-conned version on the left and to me it is clear that the width of the teeth at their outer edges on the original are significantly thicker than those on the re-conned unit, which to me would mean the teeth would be a loose fit in the mating gear, hence the rattle??
Am I right in thinking that this would cause a rattle and am I right in thinking that I should be ok to change the gears over to run with the re-conned dynamo but with the old drive gear??
Sorry the pic is on a word doc but cannot seem to get pics on the site as the files always appear to be too large.
Cheers Denis S