Hydraulic to Vaccum servo conversion

[diesel des]

If you have a bomb setup then you will have a hydraulic servo which is very small and the master cylinder is bolted to that. If I was a betting man I would say you need to follow what the s2 guys do as it would be a similar setup. Take some pictures and post them on here.

[Az786]

Will get some pics up tomorrow of everything and go from there

Cheers

[diesel des]

No one knows if they pre loaded there servo? How did you guys set the peddle to servo rod up.

[Error404]

The D3 and other model of similar age have done away with the clevis and use a ball-in-socket type arrangement, with the ball on the servo pushrod and the socket on the back of the brake pedal. So I guess that joint will need to be preloaded using the pushrod adjustment, makes sense that the servo needs some preload too.

[diesel des]

Do you or anyone have a servo and master cylinder setup off a car. Could you create a vacume on the vacume port and see if it leaks without preload?

[jade]

Yes, 26.9mm. But only to fit the dual diaphragm booster afaik

From which cars do the 26.9 master come fitted

[Error404]

Not sure of the full list but mine was off the D3 V10 TDi


Des yes I'll have a play with it over the next couple of days

[diesel des]

Good man. I'm convinced both my servos are faulty and have ordered more.... Both the servos I have leak differently. One leaks all the time and the other stops leaking when force is on the rod. But when you remove force even at the half way in position the leak is back. I think it's control valve is faulty. Should get 1 of them delivered today and get fitted tomorrow. Been without car for a few weeks now and am having withdrawal symptoms lol.

[jade]

Not sure of the full list but mine was off the D3 V10 TDi


Des yes I'll have a play with it over the next couple of days

Do you have a part number for servo and master ? all the d3 ones I have seen only seem have a 25.4 master

Thanks

[diesel des]

The other 2 servos I ordered haven't arrived yet. Error404 did you get a chance to see if your servos are vacume tight ?

[Az786]

Here's some pictures of my setup, if you could shed some light on to what I need to change for the conversion.

As said earlier it's a 1994 80q 2.6 converted to a 4.2 v8 using a 4.2 power steering pump also.

[Az786]

Pic

Pic

[Az786]

Pic

[Error404]

Wayne - 26.9mm master cylinder is 3D0611021

[jade]

Wayne - 26.9mm master cylinder is 3D0611021

Thanks, Alex