Brake line T-piece leaking

[BertBert]

As I am nearing the end of the winter(!) jobs on my radical, I have bled the brakes.

I recently fitted a new rear brake line which came from radical in two parts (old one was one) with a T-piece as shown here:

http://rides.webshots.com/photo/215945152008648684...

I thought what a pain, it's bound to leak and I dont need the pressure sensor anyway, but went ahead and fitted it.

It leaks from the pressure sensor fitting. The brake line unions are fine.

The pressure sensor is tapered, how does one seal it? PTFE tape? I wouldn;t have though so with brake fluid?

Will I be able to get a straight joiner as I don't need the sensor?

Bert

[Simon T]

I'd Try PTFE

Simon

www.tillingmotorsport.com

[RobC]

Would have thought PTFE will disolve with brake fluid?

Merlin sell joiners, example here -

http://www.merlinmotorsport.co.uk/BRAKE-&-CLUT...

(double check thread before ordering though)

[GreenV8S]

For the tapered thread to seal both parts (male and female) must be the correct thread and the threads are designed to distort and produce a complete seal when torqued up. You may be able to get other threads with the right pitch to engage and torque up apparently OK but they wouldn't seal. For example you could screw in a non-tapered thread and it might feel OK but wouldn't seal.

[chrissimp]

PTFE tape is really a no no in hydraulic or fuel line systems because bits can break off and block the line.

[BertBert]

Mmmm, it should've been the right thread as it came together from Radical...mmm on second thoughts, most of the bits i have had from them are wrong. I'll get a joining union from somewhere. Merlin or Think.

PTFE has made it seal, but I am not happy with it!

Anyone any idea what thread it's likely to be?

Bert

[chapiness]

I'd be taking it out and as Rob says put a straight joiner in .
These lines a simple enough to make yourself, buy the braided pipe and olives ,the fittings are reusable. Far cheaper than Radical ............
The pressure switch thread will be bsp

[BertBert]

yep, it'll come out. Annoyingly, I found a suitable unf fitting in the garage last night!
Bert