LDS pipe end question

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Jay-Bruce
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LDS pipe end question

Unread post by Jay-Bruce »

Looking at the LDS pipe ends, I can't get my head around how the LDS pipe ends seal - it looks like the pipe end has a small flare, an o-ring, a white plastic washer, a conical olive, and a tube nut. The logical conclusion would be the pipe seats on the flare, the tube nut pushes the cone which pushes the washer which pushes the o-ring up the flare to expand and form a seal; slight problem with that, the conical olive is bonded solidly to the pipe, so what gives us the seal?

I've modelled something in CAD, and double checking my measurements I noticed I'm planning on having the conical olive slide up the tube towards the flare as the nut tightens, But that's not what happens with the original pipes, so I'm now genuinely confused, and would like anyone's insight on hose these damned things seal before I send potentially flawed CAD models to be machined up.
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KennyW
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Re: LDS pipe end question

Unread post by KennyW »

Jay-Bruce,

When I was changing front to rear pipe, I decided to keep them and the conical olive separated. So I'm going to reuse same with new o ring on single flare and see what happens.
IMG_0071 (1).JPG
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Jay-Bruce
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Re: LDS pipe end question

Unread post by Jay-Bruce »

Great minds Kenny, single flare and jewllery is what I'm going with, I've modelled it up for the smaller sizes on the little pipe from the galvanic corrosion generator, ahem aluminium union to the rear firmness regulator:
Screenshot 2023-03-24 225826.png
Could I trouble you for dimensions on those elements? As on the front to back pipe I believe those components are bigger than the same parts on the short pipe are?
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KennyW
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Re: LDS pipe end question

Unread post by KennyW »

No problem Jay, will get done today and reply back.
C5 x7 2.0 HDi 160 hp Estate exclusive, moved on.
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.
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KennyW
Donor 2024
Posts: 2561
Joined: 17 Jan 2006, 22:22
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Re: LDS pipe end question

Unread post by KennyW »

Jay,

Here some dimensions: Brake pipe is 4.76mm diameter, conical olive is OD 8.6mm, plastic o ring OD 9mm x 1.4mm thick, brake screw 10mm x 1 spanner size 11mm.

Kenny
C5 x7 2.0 HDi 160 hp Estate exclusive, moved on.
Xantia 2.0 Hdi 90hp 1999 only 189,000 and rising!!!!!!! Moved on to a new home
C3 1.4 petrol (SWMBO)
Xantia TD 1.9 Mk 2 Estate LX 1998 model over 210,000 miles now and still rising!!!!!!!!!!!!! now deceased 17/12/2010.