Front Brake Pipes...
Front Brake Pipes...
Author
Discussion

Joho

Original Poster:

148 posts

188 months

Thursday 11th July 2013
quotequote all
Hi!

I have a problem to get new front brake pipes:
The former owner of my car mounted the front
brake tubes directly to the calipers without
the short pipes between. So now I would like
to change it to the original state, because the
tubes are touching the springs.

So I ordered those short pipes from my Triumph dealer
and tried to screw it into the calipers but the joint
is too long. The Triumph man told me that there are no
other parts to get, but the hole in the calipers is
not deep enough to hold those new long joints.
Any experience?

Thanks
Jo

2=TVR Example
1= New Triumph part


Adrian@

4,503 posts

304 months

Thursday 11th July 2013
quotequote all
BEST STOP at this point because IF you are running standard brake calipers on your car... you have been supplied with an imperial fitting AND your car should have a metric fitting on the jump pipe to flexi hose connection!!!
Adrian@

Edited by Adrian@ on Thursday 11th July 09:50

Cerberus90

1,553 posts

235 months

Thursday 11th July 2013
quotequote all
Also, why is it too long? I'd have thought it could never be too long (unless it physically won't fit due to excess height), it could be too short as you could run out of thread before the bottom of the thread is pushing the flare into the caliper.

With the longer one you'll just have more thread of the union sticking out of the caliper.

Joho

Original Poster:

148 posts

188 months

Thursday 11th July 2013
quotequote all
The calipers have metric fitting,
the flexi hose connection is imperial.
I could get both tubes (metric/imperial, imperial/imperial)
for TR6 but all the joints are too long as shown
in the photo.

Adrian@

4,503 posts

304 months

Thursday 11th July 2013
quotequote all
NO the picture is of an IMPERIAL fitting!!!

IF you were putting the fitting into the wrong hole, IE,the nipple hole then it would have this problem...more pictures (that is not going to be a problem for Johann).
Adrian@

GadgeS3C

4,684 posts

186 months

Thursday 11th July 2013
quotequote all
Jo,

Sounds advice in both posts above.

The pipe doesn't need to screw all the way in as it seals on the pipe flare at the end.

BUT as Adrian says the fitting on the other end should be metric where it joins the flexi.

To complicate it further there are (I believe) different options for the caliper which may be metric or imperial. Mine fooled me as it had a metric thread on the bleed nipple but with an imperial spanner size!

I'd suggest trying to connect the other end of the pipe to your flexi before you do anything else. If that doesn't work you need a different short pipe made up.

Edit - I don't type fast enough to keep up - 2 posts added since I started writing this. Anyway - I can't compete with Adrian@ on M series advice or Johann on photography, so I'll getmecoat


Edited by GadgeS3C on Thursday 11th July 10:13

Joho

Original Poster:

148 posts

188 months

Thursday 11th July 2013
quotequote all
@Cerberus90

The part above the thread on the photo is longer.
So if you run it into the caliper it stops after 2-3 turns,
because the hole is not very deep.
So half of the thread is outside the bore.
As I saw on different TVR photas the thread should be
completely inside the bore and only the head should
look out.

Adrian@

4,503 posts

304 months

Thursday 11th July 2013
quotequote all
The OE jump pie on the M from 74/80 is metric male and imperial female with a short 3/16 pipe.
Adrian@

Joho

Original Poster:

148 posts

188 months

Thursday 11th July 2013
quotequote all
@adrian

you're right:
The new one on the photo ist imperial,
the old one is metric.
But the length and shape of new metric ones
is the same and so they look very different
to the original ones.


What you say about the calipers on TVRs is
very interesting. My information (from TR6 people)
was that there are metric and imperial all the time,
only the metric ones are marked with M behind the PB16.
But that's untrue I think, because my metric ones
don't have an M.

Adrian@

4,503 posts

304 months

Thursday 11th July 2013
quotequote all
My boring picture of brake fittings....
Metric WITH the nicks in the hex and imperial without.
Adrian@

Joho

Original Poster:

148 posts

188 months

Thursday 11th July 2013
quotequote all
Bit unsharp but very atmospheric!

Looking simmilar to my new ones.
Whats the complete length of them?
My new one is 21,5 mm
Old one 16 mm

Adrian@

4,503 posts

304 months

Thursday 11th July 2013
quotequote all
Samsung S4 and under 2MB for the site!!
These fittings come in 19mm and 21.5 BUT the non threaded parts of both are the same, jump pipe fit in the top and nipples in the side...the easiest way (or a start point) to denote imperial OR metric calipers is that the pin size for the pad is 4.25 for metric and 6mm for imperial.
Adrian@

Joho

Original Poster:

148 posts

188 months

Thursday 11th July 2013
quotequote all
ok, thanks all!
So I first now have to ensure that my
calipers are really metric and then I
think I try to get shorter fittings similar
to the old ones on the image
and flare it to the pipes.

Joho

Original Poster:

148 posts

188 months

Thursday 11th July 2013
quotequote all
GadgeS3C said:
Jo,

Edit - I don't type fast enough to keep up - 2 posts added since I started writing this. Anyway - I can't compete with Adrian@ on M series advice or Johann on photography, so I'll getmecoat

Edited by GadgeS3C on Thursday 11th July 10:13
Gary,
Thanks anyway!

Cheers!
Jo

Cerberus90

1,553 posts

235 months

Thursday 11th July 2013
quotequote all
Joho said:
ok, thanks all!
So I first now have to ensure that my
calipers are really metric and then I
think I try to get shorter fittings similar
to the old ones on the image
and flare it to the pipes.
That can be the tricky bit as the difference between the imperial size and the metric size is so minute that you can pretty much screw either into either. Missed the bit about pad pin size, so not very difficult, biggrin

I found this site very useful for research/info.

Edited by Cerberus90 on Thursday 11th July 13:43

GadgeS3C

4,684 posts

186 months

Thursday 11th July 2013
quotequote all
Cerberus90 said:
That can be the tricky bit as the difference between the imperial size and the metric size is so minute that you can pretty much screw either into either. Missed the bit about pad pin size, so not very difficult, biggrin

I found this site very useful for research/info.

Edited by Cerberus90 on Thursday 11th July 13:43
Handy link Thomas - thanks.

I hadn't realised that the metric/imperial threads were so similar.

Joho

Original Poster:

148 posts

188 months

Thursday 11th July 2013
quotequote all
GadgeS3C said:
Handy link Thomas - thanks.
Indeed!
Thanks.