stillreel Posted July 23, 2019 Report Share Posted July 23, 2019 (edited) I bought three new flexible brake hoses to replace the front and back flex lines in the TR6 (front drive side had already been done). Parts guy at Peninsula Auto (Toronto) says the right and left rear ones are different. I didn't realize this. On installing front right hose, the one he had sold me (at an extortion rate for an 'made - in - India' knockoff) didn't fit. The purchased hose was 8" long with the two 1" fittings no the end; total length 10". The length required for the front end is 12" total length. Perhaps he's mislabeled them, thinks I. Sure enough, one of the hoses labeled for the rear is the correct length and diameter for the front. Front end now sorted. However, now I'm left with two identical rear hoses, both with 8" hose length and the 1" fittings on the ends. The question; what is the difference between the right and left rear flexi-brake hoses? Thoughts, opinions welcome. Edited July 23, 2019 by stillreel clarity Quote Link to post Share on other sites
RogerH Posted July 23, 2019 Report Share Posted July 23, 2019 (edited) Hi, in the UK, Moss no longer do the standard flex hoses. Oh yes they do - I was looking at the wrong pipe. https://www.moss-europe.co.uk/shop-by-model/triumph/tr5-6/brake-system/rear-brakes/brake-pipes-hoses-tr5-6.html Roger Edited July 23, 2019 by RogerH Duff info Quote Link to post Share on other sites
stillreel Posted July 23, 2019 Author Report Share Posted July 23, 2019 (edited) 1 hour ago, RogerH said: Hi, in the UK, Moss no longer do the standard flex hoses. They now show TT3242 as a kit of two hoses. It appears they are the same left & right. https://www.moss-europe.co.uk/shop-by-model/triumph/tr5-6/brake-system/rear-brakes/brake-pipes-hoses-tr5-6.html Roger The hoses on the car look identical too (rear: right and left). But if I was to order them individually, I would need two different parts numbers. Edited July 23, 2019 by stillreel spelling Quote Link to post Share on other sites
stuart Posted July 23, 2019 Report Share Posted July 23, 2019 The rear flexis are two different hoses as one goes into the 3 way block. GBH178 rear L/Hand GBH177 rear R/Hand Stuart. Quote Link to post Share on other sites
Sapphire72 Posted July 23, 2019 Report Share Posted July 23, 2019 (edited) The Roadster Factory shows images of the rear hoses in their catalogue. The fittings, the length and part numbers are different. The front hoses are the same part number. Edited July 23, 2019 by Sapphire72 Quote Link to post Share on other sites
Will Posted July 23, 2019 Report Share Posted July 23, 2019 Yep, the LH hose that screws into the 3-way block is sealed by means of a copper washer. Quote Link to post Share on other sites
stillreel Posted July 23, 2019 Author Report Share Posted July 23, 2019 (edited) So I got behind the rear wheels to take a look at both L & R flex hoses currently on the car and they appear to be the same length (8"). Further, the threads on the fittings on all 4 ends are all the same (3/8 UNF?). Same length, same thread and to my eye, interchangeable. As such, I'm still puzzled as to why they are different part numbers. BC Edited July 23, 2019 by stillreel Quote Link to post Share on other sites
Waldi Posted July 24, 2019 Report Share Posted July 24, 2019 Hi BC, one of the rear hoses uses a flat copper ring that compresses between the 3-way block and the boss on the hose. the other connections (ends) seal with a conical seat on both nipples (male and female) If you have the correct items and compare them you can spot the difference. Waldi Quote Link to post Share on other sites
stillreel Posted July 30, 2019 Author Report Share Posted July 30, 2019 After contacting Peninsula Auto re: the wrong part, they quickly sent out the correct hose. All four flexible brake hoses have now been replace. Note to all; this was a 1973 TR6 with the original brake lines. The inside diameter of the hose had collapsed and I suspect this is deterioration over time, and may well be occurring on similar and older vintages. If your wheels aren't spinning freely after hard braking, this may be a good spot to consider. Thanks to all whom contributed. Problem solved. Quote Link to post Share on other sites
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