Hello - I write in english, but please answer in any language you like - I need help with this problem.

B4 NG->7A umbau with all parts from donor car.

- no brake help from the servopumpe. The pump worked in the donor car.

- the servo steering is very noisy - and vibration is felt in the hydraulic line from the pump to the steering. At one point the oil escaped through the valve on top of the behalter.

I'm not sure the pipe connections is correct. I have searched the forum and found other problems and pictures, but not precise enough. The donor was right steered, so I had to be a little creative with the piping.

1 : From the ölbehalter there is a line through the oil cooler line to the side of the tandem pump. Big intake - 24mm top.

2 : From the small outlet on top front of the pump there is a line to the bomb. Not so big - 14mm top, small banjo bolt.

3 : From the small outlet on the bomb there is a line to the top rear intake on the bremskraftverstarker. Brake line dimensions - flexible in the middle.

4 : From the angled lower outlet on the bremskraftverstarker there is a line that runs to the return pipe from the steering - close to the steering outlet. Brake line dimensions. Home made from brake line.

5 : From top of the bomb there is a rubber line to the steering return pipe.

6 : From the rear big outlet on the pump there is a thick line to the front connection on the steering. 22mm top on the pump connection.

7 : From the rear outlet of the steering, there is a return pipe to the
ölbehalter. It connects to 4 and 5 before it connects to the ölbehalter.

The oil is "Ravenol" SSF (G002 000)

What do I do wrong?

mfg,
Torben - http://www.scheel.net/audi/

I think I have found the problem. I read the thread of kleinheribert - and tested the servopumpe by loosening the small brake outlet while the engine was running. Kaffeautomat - splut.....splaf....plop. Not much oil coming through there..

But did I kill it myself, or was I just unlucky? It worked the 1300km home from London in March.

I still don't understand why the behalter was suddenly overfilled

It is very clear that the steering uses a lot of hydraulic oil - big hoses and so on. The brake outlet is small, and some valve(?) is visible through the outlet hole. I must admit that I don't really understand the tandempump in full

mfg,
Torben

Ich habe ein anderes tandempumpe montiert, aber jetz ist das öl flussen durch eine kleines lock uber das druckspeicher EDIT: Quatsch! über die druckkontakt an bremsverstarker wenn das motor lauft.

Was passiert?

mfg,
Torben

Ich denke : ist da normalerweise eine ventile an der bremsverstarkerreturleitung, so das zahnstangeretur nicht influieren mit das bremsverstarker? Villeicht habe ich druck an beide seite an der bremsverstarker - und dabei ölverlust ?

Schlectes sprache, entschuldigung

mfg,
Torben

Aha! The brake servo was leaking, because I had connected it the wrong way round. Pressure at pressure escape side. It had blown the internal gasket out a bit, but it could be put back with a screwdriver once I had it at the workbench.

At the same time I played around with pressurized air, and realized that pressure at the top connection made the piston go backwards. And the two lower holes was connected. Pressure at the lower holes assisted the piston somewhat when moved by hand. In other words, the Akte drawing is misleading! Top back connection at the brake servo is the return, the lower connection is the pressure side.

Now after assembly, the steering is working fine - the brake is not tested yet. I hope to return with confirmation tomorrow.

mfg,
Torben