Botcanu Posted June 22 Report Share Posted June 22 Narrowed a strange whirring/rattle to my Dynamo/alternator . I removed it and a take off drive ( which I reckon is for a rev counter or similar) was rattling around and taking out the casing . One screw later the drive was removed along with a bit of alloy casing . The bearings seem fine . Refitted and the car has never been so quiet and better still saved myself best part of £150 for a new one 👍 Link to comment Share on other sites More sharing options...
DanMi Posted June 22 Report Share Posted June 22 What car, there is no drive in either the standard dynamo or alternator as far as I am aware, certainly not for a tachometer. A dynamo is a very simple device Link to comment Share on other sites More sharing options...
Botcanu Posted June 22 Author Report Share Posted June 22 Done a bit of research and apparently the rear end of some of the dynamos have a drive output to connect a cable driven tachometer. The end plate has a threaded portion to screw the cable onto. My car is a 1969 13/60 herald. I have attached a picture of a similar dynamo showing the threaded portion where you connect the cable to . It was all new to me as well . Every day is a school day 👍 Link to comment Share on other sites More sharing options...
johny Posted June 22 Report Share Posted June 22 Yes there were various configurations of Lucas dynamos and I dont think a tacho drive version was ever used on our Triumphs as if required this was usually taken from the distributor. Anyway will work fine as long as you can still get the occasional drop of lube oil into the rear bush👍 Link to comment Share on other sites More sharing options...
Botcanu Posted June 22 Author Report Share Posted June 22 I purchased the car last year and it’s what came with the car . I think the brand is Dynoameter. It’s actually an alternator that retains the appearance of the dynamo . There is no rev counter on my car so removing the drive from the rear of the dynamo won’t cause any issues . Link to comment Share on other sites More sharing options...
johny Posted June 22 Report Share Posted June 22 Oh I dont know much about those except a PO must have spent some big money on it! I take it ball bearings both ends so nothing to lubricate? Link to comment Share on other sites More sharing options...
johny Posted June 22 Report Share Posted June 22 I can see 465 quid new! Link to comment Share on other sites More sharing options...
DanMi Posted June 22 Report Share Posted June 22 seems odd to have a tacho on the dynamo as it is not directly connected to the engine, so would be affected by pulley sizes etc. So news to me. But not needed as Triumph used a drive from the distributer Link to comment Share on other sites More sharing options...
Peter Truman Posted June 22 Report Share Posted June 22 If I remember correctly my 61 Frogeye Sprite had a tacho driven off the back of the dynamo. Link to comment Share on other sites More sharing options...
johny Posted June 23 Report Share Posted June 23 Yes until electronics came in it looks like there were three possible drive configurations used at different times and different manufacturers but not sure the reasons why in each case: off the dynamo, the distributor or the cam shaft Link to comment Share on other sites More sharing options...
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