youngengineer Posted November 18, 2019 Share Posted November 18, 2019 I recently bough an alternator branded as a defender 200tdi 100amp alternator. The mounting lug for tensioner is on the wrong side. I was told that the 3 bolt style alternators could be clocked so that the lug could be spun to face the tensioner. I've tried several things including taking the pully off and knocking back the shaft but I still can't figure it out. The stator seems to be pressed Into the front of the casing preventing it from spinning. Am I missing something? Quote Link to comment Share on other sites More sharing options...
Snagger Posted November 18, 2019 Share Posted November 18, 2019 That is sided to fit a Discovery/RRC 200Tdi, so shouldn’t have been sold as a Defender part. I have altered 65A units, but not this type, which looks like a 300Tdi type with swapped pulley. I’m interested in what advice you get - I had assumed that removing those three bolts would allow the front cover to be rotated 120degrees. Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 18, 2019 Author Share Posted November 18, 2019 Would be great to find a solution that does not require purchasing a new one. Any ideas welcome. Quote Link to comment Share on other sites More sharing options...
Ex Member Posted November 18, 2019 Share Posted November 18, 2019 Yes, you need to remove the pulley and knock the front casing loose to rotate. Or you could just buy a 100A alternator already setup for a 200TDI Defender. They are available and not expensive. Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 18, 2019 Author Share Posted November 18, 2019 (edited) Pully has been removed and shaft knocked through. The stator is bolted to pully side of casing with bolts running through it. The nuts that hold the stator in are not accessable unless you desoldering the windings and pull rear casing off. You can see the small nuts I am talking about on the last photo. Edited November 18, 2019 by youngengineer Quote Link to comment Share on other sites More sharing options...
western Posted November 18, 2019 Share Posted November 18, 2019 I had a 65amp Alt on my Defender spec 200tdi for a few years & replaced it with a 100amp https://forums.lr4x4.com/topic/101545-defender-200-tdi-alternator-upgrade/ my current 100amp alternator bought from a local auto electrics came as part number RE2762 100-067 replaces 54022606,Lucas LRB367, LRB368, LRB291, O.E.M. YLE10100, Thats on the box label mine came in & was a direct swap.this on was fitted 29 Aug 2014 & still working fine. Quote Link to comment Share on other sites More sharing options...
simonb Posted November 18, 2019 Share Posted November 18, 2019 It's been a while since I had one of these apart but I don't think the front casting easily comes away from the stator. On the 65A type (and the 45A type on 2.5 NA/TD) the stator can be easily removed. I think on these its more firmly attached. It probably is doable but would need all the back of and the stator unsoldered from the rectifier pack. I'd be tempted to send it back... Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 18, 2019 Author Share Posted November 18, 2019 1 hour ago, simonb said: It's been a while since I had one of these apart but I don't think the front casting easily comes away from the stator. On the 65A type (and the 45A type on 2.5 NA/TD) the stator can be easily removed. I think on these its more firmly attached. It probably is doable but would need all the back of and the stator unsoldered from the rectifier pack. I'd be tempted to send it back... Yes that's the conclusion I came to. I bought it from Facebook marketplace months ago so it's not exactly refundable. I've now managed to strip the threads on the pully shaft so its pretty much knackered. £100 wasted but I've learnt my lesson. Ordering a new unit tomorrow. Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 20, 2019 Author Share Posted November 20, 2019 (edited) Ok so the new unit has arrived. Based on the photo where does one connect the output for the tachometer? On the old alternator it was the D+ terminal. I cannot see it on this new unit. Edited November 20, 2019 by youngengineer Quote Link to comment Share on other sites More sharing options...
daveturnbull Posted November 20, 2019 Share Posted November 20, 2019 W terminal I believe. 1 1 Quote Link to comment Share on other sites More sharing options...
Bowie69 Posted November 20, 2019 Share Posted November 20, 2019 Yep, W. 1 Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 20, 2019 Author Share Posted November 20, 2019 Thanks. I ended up figuring it out. I assume the small unmarked spade terminal next to the the two larger battery output spade terminals is exciter bulb. Quote Link to comment Share on other sites More sharing options...
western Posted November 20, 2019 Share Posted November 20, 2019 There's a 'W' marked next to the far right terminal stud -- ringed in yellow & increased pic in size. Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 20, 2019 Author Share Posted November 20, 2019 2 hours ago, western said: There's a 'W' marked next to the far right terminal stud -- ringed in yellow & increased pic in size. Yeah that's the old alternator that did not fit. The new one had no markings. Thanks again Quote Link to comment Share on other sites More sharing options...
western Posted November 20, 2019 Share Posted November 20, 2019 W terminal on your new alternator on left of your picture ringed in red Quote Link to comment Share on other sites More sharing options...
simonb Posted November 21, 2019 Share Posted November 21, 2019 22 hours ago, youngengineer said: Thanks. I ended up figuring it out. I assume the small unmarked spade terminal next to the the two larger battery output spade terminals is exciter bulb. yes 1 Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 22, 2019 Author Share Posted November 22, 2019 I dont seem to be getting any output from the alternator. The charge light is connected to the small unmarked spade terminal. The tachometer to the W and battery to the B+ terminal. Quote Link to comment Share on other sites More sharing options...
western Posted November 22, 2019 Share Posted November 22, 2019 Try the cables to Starter/battery on the 2 large spade terminals. 1 Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 22, 2019 Author Share Posted November 22, 2019 (edited) I did think about that but it involves rec-crimping the terminals which I just did for the previous alternator. I did test for connection between the B+ terminal and spades and seems like they are on the same circuit l. I may still try however as running out of.ideas Edited November 22, 2019 by youngengineer Quote Link to comment Share on other sites More sharing options...
western Posted November 22, 2019 Share Posted November 22, 2019 is this wire [yellow arrow] connected to anything ? Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 22, 2019 Author Share Posted November 22, 2019 The warning bulb/exciter. Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 22, 2019 Author Share Posted November 22, 2019 (edited) Not sure if it's related but my oil pressure warning light now does not go off either. I've just made an adaptor to convert the two round terminals to a single spade and connected it to one of the two large spade terminals.. It's made no difference.. either this alternator is dead on arrival or the charge circuit is broken. Probes between alternator body and battery leads are showing 12.6 volts. So I can assume ground is good so are battery terminals. Edited November 22, 2019 by youngengineer Quote Link to comment Share on other sites More sharing options...
Tanuki Posted November 22, 2019 Share Posted November 22, 2019 You haven't inadvertently swapped the alternator warning-light and the oil-pressure-light wires over have you? Quote Link to comment Share on other sites More sharing options...
youngengineer Posted November 22, 2019 Author Share Posted November 22, 2019 (edited) 9 minutes ago, Tanuki said: You haven't inadvertently swapped the alternator warning-light and the oil-pressure-light wires over have you? No chance. Nothing has been touched anywhere dashboard or oil filter side of engine. Tachometer does not work either so alternator is not even producing a signal either. I just checked the belt and the alternator is spinning as it should. Edited November 22, 2019 by youngengineer Quote Link to comment Share on other sites More sharing options...
western Posted November 22, 2019 Share Posted November 22, 2019 Sounds like a dead alt then, I would send it back & get another. Quote Link to comment Share on other sites More sharing options...
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