Eddie Trickett Posted April 5, 2021 Report Share Posted April 5, 2021 Attached is photo of the alternator that came with the car. Is this the one that needs an external regulator. If so is is worth getting one when the alternator is untested or should I bite the bullet and buy a new alternator? Thanks Eddie Quote Link to post Share on other sites
trchris Posted April 5, 2021 Report Share Posted April 5, 2021 Hi Eddie As you have a Lucas unit I would recommend you have it overhauled you should be able to find a auto electric repair specialist nearby Chris Quote Link to post Share on other sites
RAHTR4 Posted April 5, 2021 Report Share Posted April 5, 2021 Hi Eddie, More information is required from your alternator, they initially had a metal tag attached to one of the clamping bolts and this denoted the model and part numbers. The first cars in 1968 were fitted with a 15AC alternator, part number 23544 A/D and this required a control box 4TR, part number 37527 A. The 1969 cars are listed as having a 15ACR alternator, part number 23562 A. Any visible marking on your alternator...? Regards, Richard Quote Link to post Share on other sites
BlueTR3A-5EKT Posted April 5, 2021 Report Share Posted April 5, 2021 (edited) Yours Looks like a Lucas ACR type alternator. This is the 15AC unit. Note part plastic part aluminium back end. Peter W Edited April 5, 2021 by BlueTR3A-5EKT Quote Link to post Share on other sites
Eddie Trickett Posted April 6, 2021 Author Report Share Posted April 6, 2021 Thanks everyone for the replies. The only markings on the alternator apart from LUCAS is a sticker saying remanufactured in Japan. I have taken the plastic cover off and attach a picture. The closest I have found on the Internet is 18ACR on an MG with a note to ignore the offset terminal. Unless someone comes up with a different idea I will wire up like that . Thanks Eddie Quote Link to post Share on other sites
RobH Posted April 6, 2021 Report Share Posted April 6, 2021 Yes that is an ACR type Eddie - the regulator is the square box at the bottom in your photo with the wires coming out of it. The output is on both of the wide spades and the top thin spade is the warning light connection. The two other connection points on the lower right are not used, as you say. Quote Link to post Share on other sites
Eddie Trickett Posted April 6, 2021 Author Report Share Posted April 6, 2021 Many thanks Rob. I can now continue with fitting all the electrical gear and hopefully get it in for MOT soon. Eddie Quote Link to post Share on other sites
Eddie Trickett Posted July 6, 2021 Author Report Share Posted July 6, 2021 Update, the alternator didn't work and I don’t know anyone local who could repair. So have fitted a replacement Chinese one which is fine for now. Quote Link to post Share on other sites
Eddie Trickett Posted August 8, 2021 Author Report Share Posted August 8, 2021 For information my TR6 alternator stopped charging. I checked output voltage, 0V DC, 25 VAC. Purchased an alternator repair kit on ebay, £19.95. It was an easy replacement and alternator now works. Quote Link to post Share on other sites
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