SVC dual servo

[chris.richard]

Anybody got a note of the theads - ?M10 x 1, or are they imperial?

[kolynos]

The threads are imperial which is unusual for a part thats made in Spain...

[chris.richard]

7/16 x 20 then?

[AndyH]

Chris,

It is imperial... Standard imperial union.. Can't remember if this is 7/16", but this sounds about right.

Just fitted one of these servos and first time round EVERY fitting on the servo leaked. Then depression set in !

It's not the union that's the problem, but the flare type. It's an SAE flare.
Most flaring tools flare to a DIN standard.

I initially used a simple, cheap flaring tool... Car Builders Soultion and Frost do this unit. It produces a DIN flare, but a fairly shallow one. I think this would not seat because it was shallow.

I then did a bit of internet research and decided I needed a more bulbous flare. I'd borrowed a Sykes Pickavant professional unit a couple of years ago when I did the pipes originally on the car. It wasn't available when I needed hence the CBS unit.

I waited for it and re-made all the pipes. Nice bulbous flare, same unions. All OK first time with little more than finger tight and a bit more.

This was my experience... could be B__llocks, but worked for me.

Andrew

[strat fan]

I'm 99% sure you will find it is a 3/8" union. I fitted one a while ago to a another type of kit car & it definately wasn't 7/16"

I don't know what flare was on the pipes (I think they were done with a Sykes Pickavant tool also) but I had no problem with leaks
& the servo works very well (almost too well). The installation had a std Jag m/cyl & Ford brakes.