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Joined: Nov 2018
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Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
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As we are typing of brake lines, I really need someone to tell me that the "T" in question requires any kind of washer to seal the connections.
Whereas my thinking would be that the either the "T" or the pipe flair are not mating correctly and thus leaking. Any attempt to seal with washers might indeed work but surely would be regarded as non standard and a risky bodge, perhaps more so if the connection has been over tightened or the threads in both items in the connection are of a mis-match..? I don't recall fitting them on mine - possibly the flexi hose to the T piece, but not on the fixed copper pipe sections. As I said above, my thinking is a thread issue.
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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I may be wrong but I don't think Dowty washers are compatible with Brake fluid? Good point, but not if the washers used employ EDPM rubber apparently, as used in brake caliper seals.
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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Joined: Nov 2018
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Talk Morgan Sage
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Talk Morgan Sage
Joined: Nov 2018
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I may be wrong but I don't think Dowty washers are compatible with Brake fluid? Good point, but not if the washers used employ EDPM rubber apparently, as used in brake caliper seals. Dowtys are usually some type of nitrile like you mentioned, which does not like brake fluid. Personally, I wouldn't take the risk.
"Y mae dafad ddu ym mhob praidd"
1972 4/4, 1981 MGBGT, 1984 FLHT1340, 1980 XLH1000, 1990 ZX10
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Plus Four MY23 Furka Rouge
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Talk Morgan Expert
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Talk Morgan Expert
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I have never come across washers in such a situation. Indeed, I am thinking that a washer could actually prevent a good seal on the mating surfaces, if it is just a teeny bit out. Just because there was one there before, doesn’t mean it was original.This needs a definitive answer from someone with a Morgan from the same era.
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Thanks for the suggestions - there was a copper washer on there previously so I assumed it would need one for the new fitting - perhaps not. The union and the brake pipes are both new from New England Morgan Spares so I'd be disappointed if this was a compatibility issue. Definitely a significant leak (so probably more than a thread sealant should be used for). Back to the drawing board for now. I did notice that in this diagram on their site there does appear to be a washer - no. 39 but it's not labeled so I'll see if they can shed light on what I should be using here.
Last edited by RobFog; 17/05/22 03:36 PM.
1974 4/4 2 seater
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Talk Morgan Expert
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Talk Morgan Expert
Joined: Jun 2015
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Thanks for the suggestions - there was a copper washer on there previously so I assumed it would need one for the new fitting - perhaps not. The union and the brake pipes are both new from New England Morgan Spares so I'd be disappointed if this was a compatibility issue. Definitely a significant leak (so probably more than a thread sealant should be used for). Back to the drawing board for now. I did notice that in this diagram on their site there does appear to be a washer - no. 39 but it's not labeled so I'll see if they can shed light on what I should be using here. so there is…we learn something every day. So it’s now an issue as to whether it’s the correct sized washer or… I notice that part 36 looks to be a flexible rubber pipe. Is that what you have or are you trying to mate a solid pipe to the tee piece??
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Joined: Jul 2019
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Charter Member
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Charter Member
Joined: Jul 2019
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As we are typing of brake lines, I really need someone to tell me that the "T" in question requires any kind of washer to seal the connections.
Whereas my thinking would be that the either the "T" or the pipe flair are not mating correctly and thus leaking. Any attempt to seal with washers might indeed work but surely would be regarded as non standard and a risky bodge, perhaps more so if the connection has been over tightened or the threads in both items in the connection are of a mis-match..? I don't recall fitting them on mine - possibly the flexi hose to the T piece, but not on the fixed copper pipe sections. As I said above, my thinking is a thread issue. TBM you were correct, whereas I had been thinking the metal lines and forgot about the flexy.... Duh ! Sorry Rob I led you astray... An unusual place to have a leak, I might be inclined to check the length of the thread on the flexible hose and compare it to the depth of the threaded recepticle on the "T" ? Flexy hoses can come with a variety of ends some with flat ends and some rounded/domed. If either the receptical on the "T" is short, or the threaded end on the flexy too long, then I can understand that someone might use two copper washers to make up the difference..
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This is what I got back from New England Morgan Spares We checked here, the hose is bottoming out.
Take a little material off of the end of the hose with a file or a die grinder so it doesn't bottom out. So I guess a new skill to pick up as I move closer to the engine bay 
1974 4/4 2 seater
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That explains it then Rob... I am assuming the end/nose of the flexy is flat. If that might be the case then you could damage the threads with any material removal if not done carefully. Also you would not wish to get any filings inside the flexy pipe to later find their way on to brake seals, thus the two washer system seems a reasonable bodge..?
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