Jeffds1360 Posted July 15, 2021 Report Share Posted July 15, 2021 Hi guys. I stripped my c40 after fitting a c40l. (thanks Roger) I found a corrugated washer between the fan and pulley. Unusual and not in the book but wth! I pulled the end bracket off and the brushes were fine, however there was no sign of the felt ring or alloy sealing disc...???. I then pulled the armature and found substantial play in the drive end ball bearing, as expected. After removing the bearing I found no corrugated washer or felt washer but there was a washer of sorts, a very flat 'w' shape.??? So......on reassembly, I fitted a felt washer under the 'w' washer, not realising the PO may have done some 'jiggling' I then found that on fitting the fan, it went past the woodruff key and span freely!!!!! That is why the corrugated washer had been put there, to grip the pulley!!! Rollocks! I just realised where the corrugated washer should have been and the bearing locating ring was too short??? or something else was amiss?? Well its all back together now. Spins freely and feels good. The rivets were a nightmare to replace. Should I strip it down again and why does the fan not locate on the woodruff key? Link to comment Share on other sites More sharing options...
daverclasper Posted July 15, 2021 Report Share Posted July 15, 2021 (edited) I seem to remember that the fan goes past the key and spins, though when the nut is tightened up, the fan is secured? Not sure if that's the query now it's back together?. Edited July 15, 2021 by daverclasper Link to comment Share on other sites More sharing options...
Jeffds1360 Posted July 15, 2021 Author Report Share Posted July 15, 2021 Cheers Dave, I'm more bothered about the felt washer and end play. It just seemed odd that the PO had used the washer from the bearing as a 'grip' on the fan !! and used a weird one to replace it. Not to worry. I'll swap it back on to the car and see how it runs. Thanks for that info. Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 15, 2021 Report Share Posted July 15, 2021 agree the fan is not located to be driven by the keyway just the clamping of the pulley nut pete Link to comment Share on other sites More sharing options...
Jeffds1360 Posted July 15, 2021 Author Report Share Posted July 15, 2021 Thanks Pete, must be in the right place then. I was thinking the whole shaft may be to far forward, what with me putting felt washers at both ends, as per the book. I'd love to know what that aluminium retaining washer at the back end looks like! The books show a triangular shape ! Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 15, 2021 Report Share Posted July 15, 2021 is it a spark shield for the comm ??? to keep carbon particles out of the bearing zone ??? Pete Link to comment Share on other sites More sharing options...
Jeffds1360 Posted July 15, 2021 Author Report Share Posted July 15, 2021 Mmmmmm. Maybe?? No sign of it in my setup! My Australian parts catalogue has 7 and 8 back to front.. unless it is upside down Link to comment Share on other sites More sharing options...
johny Posted July 15, 2021 Report Share Posted July 15, 2021 my dyno fan has a slot in it to locate on the same key as the pulley. As I explained in the other thread the key was destroyed when trying to remove it so I pinned the pulley and was going to just rely on the shaft nut to clamp the fan in place. However I changed my mind when I started to think about the dynamo being accelerating with the fan free to slip under inertia and made up a little bar to sit in the pulley and fan key ways so transmitting the drive... Link to comment Share on other sites More sharing options...
Jeffds1360 Posted July 16, 2021 Author Report Share Posted July 16, 2021 Yes Johny, would not want that flying off! Here is a picture of the corrugated washer. I guess this is meant to be under the bearing, on top of the felt washer at the drive end? Link to comment Share on other sites More sharing options...
rogerguzzi Posted July 16, 2021 Report Share Posted July 16, 2021 Hello Jeff I do not think Lucas would have fitted one of those. That is a shakeproof type! They normally fitted the wavy washer that acts like a spring if you google wavy washer you will see what I mean Roger Link to comment Share on other sites More sharing options...
Pete Lewis Posted July 16, 2021 Report Share Posted July 16, 2021 thats a std external star shakeproof washer would be fitted under the pulley nut not anywhere else certainly never for any internal fixing Pete Link to comment Share on other sites More sharing options...
Jeffds1360 Posted July 16, 2021 Author Report Share Posted July 16, 2021 Ahh, thank you both. The wsm and Haynes describe the washer under the bearing as 'corrugated' and that was what I thought that was. The flat u u washer must be correct then. That's good. No need to re-strip my old one then One more item for the spares box Link to comment Share on other sites More sharing options...
johny Posted July 16, 2021 Report Share Posted July 16, 2021 Jeff, can you now still turn the fan while holding the pulley or are they solidly connected? Link to comment Share on other sites More sharing options...
Jeffds1360 Posted July 16, 2021 Author Report Share Posted July 16, 2021 They are solidly together Johny. Centre is tight to Bush. Had to 'ease' a few of the blades out though Link to comment Share on other sites More sharing options...
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