DSJ666 Posted July 18, 2018 Report Share Posted July 18, 2018 Hi all, Anyone know the bolt size/thread type for the dynamo tensioner strap on a TR4a. The one that goes into the engine, not the dynamo. Cheers Quote Link to post Share on other sites
bob-menhennett Posted July 19, 2018 Report Share Posted July 19, 2018 (edited) Hi If it's item 37 on this link https://www.moss-europe.co.uk/shop-by-model/triumph/tr2-4a/electrical-system/charging-system/dynamo-tr2-4a.html Part GHF163 https://www.mohttps://www.moss-europe.co.uk/shop-by-model/triumph/tr2-4a/electrical-system/charging-system/dynamo-tr2-4a.htmlss-europe.co.uk/screw-5-16-unc-x-1-ghf163.html?assoc=115145 As stated a UNC 5/16" x 1" Bob Edited July 19, 2018 by bob-menhennett Quote Link to post Share on other sites
DSJ666 Posted July 19, 2018 Author Report Share Posted July 19, 2018 Cheers Bob, Yes that's the beasty...great!! Problem solved. Quote Link to post Share on other sites
bob-menhennett Posted July 19, 2018 Report Share Posted July 19, 2018 This Forum just loves to problem solve. Collectively , someone usually has the answer. Keep the questions coming. We love the challenge and appreciate feedback as to whether a particular piece of advice worked or not. Are you doing running repairs or are you in the middle of a restoration ? The " thanks " is appreciated. Bob Quote Link to post Share on other sites
DSJ666 Posted July 19, 2018 Author Report Share Posted July 19, 2018 Running repair...I was just checking the car over ready for a trip to the Silverstone Classic this weekend and noticed the aforementioned bolt missing! Due to time I've done a stop gap temporary fix with a smaller bolt and nut and will replace with the correct one a.s.a.p. now I know what I need. Cheers Quote Link to post Share on other sites
BlueTR3A-5EKT Posted July 19, 2018 Report Share Posted July 19, 2018 Given an original parts catalogue and this from Canley Classics, you will be able to sort part numbers into sizes. https://www.canleyclassics.com/standard-triumph-hardware-catalogue/ Cheers Peter W Quote Link to post Share on other sites
Don H. Posted July 19, 2018 Report Share Posted July 19, 2018 (edited) +1 on Peter's advice. This approach is seriously powerful in figuring out fasteners on our cars! (I have an original copy of that fastener catalog -- most useful.) Edited July 19, 2018 by Don H. Quote Link to post Share on other sites
Waldi Posted July 19, 2018 Report Share Posted July 19, 2018 The Moss catalogue does the same for most standard fasteners. There is a table in the back listing fasterer type, size to part number. Very helpful. Waldi Quote Link to post Share on other sites
BlueTR3A-5EKT Posted July 19, 2018 Report Share Posted July 19, 2018 (edited) The Moss catalogue does the same for most standard fasteners. There is a table in the back listing fasterer type, size to part number. Very helpful. Waldi Yes, I wrote it with the use of the Standard Triumph Hardware catalogue as continuous reference. Peter W PS In my opinion the one in the back of the Sprite & Midget and the Spitfire catalogues are more comprehensive. Edited July 19, 2018 by BlueTR3A-5EKT Quote Link to post Share on other sites
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