Woody2000 Posted June 9, 2021 Report Share Posted June 9, 2021 My alternator has totally given up and way beyond repair !!!!!! i looking to replace or upgrade it .Mine is a 15ACR think I can go up to 16/17ACR replacement it’s off a 2000 1973 there are some on EBay for about £55 but not Lucas what do people suggest ???? Any help greatly appreciated Link to comment Share on other sites More sharing options...
GrahamB Posted June 9, 2021 Report Share Posted June 9, 2021 I replaced the 16ACR on my Spitfire with an uprated 60 amp alternator from Canley Classics. The replacement looked the same as the original and fitted without any adjustments or modifications. This was some years ago and it has performed without any issues. I realise mine in a 4 cylinder and not a 6 but if your original is a 15ACR, I can see no reason why the uprated alternator would fit a 2000 but you may wish to wait until someone confirms that they are interchangeable. Canley Classics price is £54. Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 9, 2021 Report Share Posted June 9, 2021 the only thing to look out for is the handing of the mounting lugs most lucas type can be moved to change upper /lower adjusting lugs but left hand and right hand hanging need to be right if the rear lug has a short metal bush fitted make sure the bush is roughly centred or the lug will break off quickly if the lug is hard against the bracket needs room for heat expansion Pete Link to comment Share on other sites More sharing options...
thescrapman Posted June 10, 2021 Report Share Posted June 10, 2021 There has been stories of the new Lucas alternators being poor quality, not needed to try one myself. You could also look for an A127, make sure it has the single fan belt rather than the ribbed pulley. Mk3 Escorts and Transits were a source I thunk. Link to comment Share on other sites More sharing options...
Clive Posted June 10, 2021 Report Share Posted June 10, 2021 Brand new copy stuff can be variable in quality/life expectancy. Some last well, others fail from new. These days I prefer to fit a new one that is branded. Had excellent experiences with the little Denso 40A alternators. Small, light, but about £100 now (or £200 from Brise motorsport) Link to comment Share on other sites More sharing options...
SpitFire6 Posted June 12, 2021 Report Share Posted June 12, 2021 A127 is a good replacement. LUCAS brand is hardly a sign of quality. 1 Link to comment Share on other sites More sharing options...
Peter Truman Posted June 12, 2021 Report Share Posted June 12, 2021 I've brought 2 replacement supposed Lucas 15ACR Alternators here in Aus off fleabay at separate times they have come in Bosch box's, 12v 34A Part No. 912447 6034-943, imported into the EU by RB (presumably Robt Bosch), one was fitted to a friends TR4 around 5 years ago and works well the other is my spare. I paid under $100Aus each, The other one I have as a spare is a South African made Prestolite A127 copy brought from a local motor factor, which was given/fitted to a friends PI and failed after 6 months, he gave it back to me and i purchased a new diode pack very cheap from an auto elect, it was then fitted to the Sprint for 6 months after it's original failed, I rebuilt that original Lucas unit with a new again cheap regulator pack & that rebuilt unit was refitted and has been in 4 years. Ironically the Sprint came from the chap who has the TR4, both Regulators failed within 3 months, of course my Sprint one failed after I'd given my then spare Bosch/Lucas 15ACR to the TR4 owner! Whilst I've brought new aftermarket replacement Alternators they have been used as temp fixtures whilst I've successfully rebuilt the original units with new Diode and Regulator packs very easily and cheaply. Link to comment Share on other sites More sharing options...
Woody2000 Posted June 13, 2021 Author Report Share Posted June 13, 2021 On the back of mine I have two plugs that plug in unlike some of them which have only one what’s the other one for using important???? Link to comment Share on other sites More sharing options...
poppyman Posted June 13, 2021 Report Share Posted June 13, 2021 That alternator is the old 15acr you can fit the 17acr lucas type and the thick brown wire goes to the large terminal and the small wire (warning light) goes to the small terminal. Just chop the plugs off and fit new terminals. I did the very same on my Dolomite last year. Tony. Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 13, 2021 Report Share Posted June 13, 2021 the rust on the terminal blades has a lot to do with it being kaput Pete Link to comment Share on other sites More sharing options...
SpitFire6 Posted June 13, 2021 Report Share Posted June 13, 2021 17 minutes ago, Pete Lewis said: the rust on the terminal blades has a lot to do with it being kaput Pete I see no rust. Call me Nelson? Link to comment Share on other sites More sharing options...
Woody2000 Posted June 13, 2021 Author Report Share Posted June 13, 2021 Sorry Tony which wires on which plug ????On the back of mine I have two plugs that plug in unlike some of them which have only one what’s the other one for using important???? Link to comment Share on other sites More sharing options...
Woody2000 Posted June 13, 2021 Author Report Share Posted June 13, 2021 Sorry Tony which wires on which plug ??? Have posted two more photos !! Link to comment Share on other sites More sharing options...
thescrapman Posted June 14, 2021 Report Share Posted June 14, 2021 Woody, do you not have the Delco unit fitted to some Mk2 2000's??? That has 2 plugs I thunk. Link to comment Share on other sites More sharing options...
Woody2000 Posted June 16, 2021 Author Report Share Posted June 16, 2021 On 14/06/2021 at 21:50, thescrapman said: Woody, do you not have the Delco unit fitted to some Mk2 2000's??? That has 2 plugs I thunk. no It’s a 15 ACR Lucas unit 😡 Link to comment Share on other sites More sharing options...
thescrapman Posted June 16, 2021 Report Share Posted June 16, 2021 I had to dig my factory manual out. looks like that version of the 15ACR has some of the wiring external, so has the 2 plugs. As to why... perhaps a carry on from the 15AC as used on the Mk1 PI, that has 2 plugs, and the regulator is separate on the wing, Link to comment Share on other sites More sharing options...
Peter Truman Posted June 16, 2021 Report Share Posted June 16, 2021 Yep a friends PI had a separate regulator on the suspension turrent and when he replaced the alternator & regulator, he didn't realise about the different alternators ie built in regulator the result was the tacho read twice the old and actual engine revs, took ages to sort out? Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 17, 2021 Report Share Posted June 17, 2021 have you got the olde 4TR relay in the engine bay ???? Link to comment Share on other sites More sharing options...
Peter Truman Posted June 17, 2021 Report Share Posted June 17, 2021 Aren't the Alternator designations 15AC being non regulated, with separate regulator and 15ACR being regulated, with built in regulator. Pete if your asking me re the 4TR Regulator no it had an Australian Lucas unit similar to that used in Aus Holden's of the era, probably part of the local content necessary to get import duty credits with CKD assembled cars. I think they used to achieve around 30% local content rads/cooling, electrics, upolstery, glass, brakes etc. Link to comment Share on other sites More sharing options...
Woody2000 Posted June 17, 2021 Author Report Share Posted June 17, 2021 no I haven’t got a relay on the wing have looked up the wiring diagrams and found this which shows two plugs coming out of the alternator Link to comment Share on other sites More sharing options...
Pete Lewis Posted June 18, 2021 Report Share Posted June 18, 2021 older alternators often have a battery sensing wire eg. vauxhalls did it a lot way back a more modern wont need it you just have the charge wire and the warning lamp some may take the main battery feed from the alternator rather than our old design which takes form the starter solenoid etc, Pete Link to comment Share on other sites More sharing options...
Woody2000 Posted June 30, 2021 Author Report Share Posted June 30, 2021 Quick update new alternator fitted thanks for all the help yet again Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now