Mark Hammond Posted March 26, 2013 Share Posted March 26, 2013 Well I went to use the Herald today and the battery didn't have enough to get it going. Before I dismiss the battery as being the culprit (it is 7 years old) I will charge it fully and drop test it. The car hasn't had much use in recent months and this, coupled with the cold weather might be the death of the battery but a few months ago I had to replace the dynamo and for quickness fitted a freebie donated from a Morris Minor, it fitted but I noticed that the pulley is much larger and I was wondering if this would effectively make the dynamo spin slower thus reducing the charging rate? Anyone have any ideas on this? In any case I would like to fit the correct unit as the temporary one is rusty on the case and spoils an otherwise mint engine bay. Does anyone have a working and tidy Herald dynamo they would like to donate? I'm based in Cobham in Surrey near J10 M25. Beer tokens provided of course.Mark Quote Link to comment Share on other sites More sharing options...
junkuser Posted March 26, 2013 Share Posted March 26, 2013 The larger pulley would certainly increase the engine revs at which the dynamo started giving an adequate output to charge the battery.If you still have the old unit it would be worth swapping the pulleys. Quote Link to comment Share on other sites More sharing options...
Mark Hammond Posted March 26, 2013 Author Share Posted March 26, 2013 I thought about that but the Morris dynamo is very scruffy. Probably not beyond redeeming but I would prefer the correct one as this one seems bigger as well.M. Quote Link to comment Share on other sites More sharing options...
herald948 Posted March 26, 2013 Share Posted March 26, 2013 Do you still have the "original"? Is it rebuildable? Quote Link to comment Share on other sites More sharing options...
Nick Moore Posted March 27, 2013 Share Posted March 27, 2013 My first thought was "rev 'er 'arder".Maybe Morries had smaller pulleys because they were driven at 1000rpm by Nurse Gladys Emmanuel, while Heralds were typically operated at valve bounce by keen motorists?Of course you could buy one of the alternators disguised to look like generators.N Quote Link to comment Share on other sites More sharing options...
Jordon T Posted March 27, 2013 Share Posted March 27, 2013 Thats interesting as the Dynamo on my Herald was exactly the same as the one fitted to my Traveller! So maybe the rusty old one you where given didn't originate from a minor.'Dynalite' do dynamo's with alternator internals, but the cheapest i've seen them for is around the £350!!! http://www.autoelectricsupplies.co.uk/product_list/141James paddocks do recon Dynamo's at a very reasonable £32.50 (pre VAT) or a OE genuine one for £47.50 (pre VAT) Quote Link to comment Share on other sites More sharing options...
john1360 Posted March 27, 2013 Share Posted March 27, 2013 Hi Mark - if you are still looking I have the dynamo that came out of my 13/60 that your more than welcome to. It's not brand new but would clean up I'm sure and was working fine when I took it off. I'm only in Staines and will be going to leatherhead on Saturday.John Quote Link to comment Share on other sites More sharing options...
Mark Hammond Posted March 27, 2013 Author Share Posted March 27, 2013 John that's great. Pm sent!M. Quote Link to comment Share on other sites More sharing options...
.thumb.jpeg.b15b81ef10abeea1c3039ae03c4a9f3a.jpeg)
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.