Some of the small pics on the left do not show a pic but the red cross, but when clicking on them for enlargement, they can be seen. maybe you can correct that later, and if possible add the dimensions of the gasket, then this document is perfect!

I try to answer some questions, but leave open if I am not sure, probably some other people here know better and will add the answers, so that we have all documented.


QUESTION 1:
The two screw-ins with two holes - the bigger of the two tightens to a stop, but the small one I can continue tightening and compressing the spring - when do I know when to stop?

"I will try to find one in my parts box, maybe still available and will check it. Maybe someone has one in stock and checks it"

QUESTION 2:
Of the THREE little balls, there are THREE different sizes. I hope I put them back in right. According to the picture in link above, it goes from left to right the Biggest to the Smallest. Was that right?

"have not yet opened it"

QUESTION 3:
How do I know how to position the lever on the rod?

Here is the German text, use google translate for that:

1: Drehschieber
2: Hebel
3: Ruecklauf
4: Vorlauf
5: zum Verteiler
6: Druckablassschraube
7: Absteckbohrung

Durch Erhoehen der Hinterachslast federt das Fahrzeug ein. Hierbei verdreht sich der Stabilisator und betaetigt ueber eine Stange den Drehschieber am Regelventil in Richtung heben.
Bei laufendem Motor kann nun das Oel zum Verteilerstueck und von dort ueber den Druckspeicher in die Federbeine und unter die Daempferkolben gelangen. Durch diesen Oeldruck wird die Karosserie angehoben und gleichzeitig verdreht sich der Drehschieber des Regelventils zurueck in die Nullage (Konstruktionslage). Mit Erreichen der Nullage schliesst das Regelventil und das von der Kolbenpumpe gefoerderte Oel fliesst durch die Ruecklaufleitung in den Oelbehaelter zurueck. Durch das Mindestdruckventil kann der Systemdruck hinter dem Regelventil nicht unter p = 30 bar fallen. Das Ueberdruckventil begrenzt den maximalen Druck und oeffnet bei p = 130 bar.
Die Abstimmung im Regelventil sorgt dafuer dass die waehrend der Fahrt auftretenden dynamischen Ein- und Ausfederbewegungen nicht ausgeregelt werden.

Die Nulllage kann man feststellen, denn im Drehschieber ist ein Loch und im Gussteil des Ventil, wenn man durch diese beiden Loecher (Absteckbohrung Nr. 7) einen kleinen Schrauberzieher oder Draht durchschieben kann = Uebereinstimmung der Lage, das ist Nullage.

Basically: in the lever there is a hole, and in the unit is a small hole, if these 2 are in line and a pin or a bolt can be put thru both, then the regulating valve is at zero position.
In this link you can see the drawing (also on my website under LAD/Niveau in larger format) and here you can see a pic of an assembled valve which shows the lever too
http://www.7-forum.com/forum/24/komponenten-niveauregulierung-edc-deren-lage-84467.html
There I have collected all data I have about the LAD system.


QUESTION 4:
Should I be cleaning the rust off and re-painting the housing?

Housing is made of cast iron I believe, not absolutely necessary, but a fresh coat looks better, although no one will notice ;-)

QUESTION 5:
After reassembling Hex screw, how free-spinning should the lever-and-rod be? It seems to tighten up quite a bit.

"Maybe that is because of the new O-ring/gasket? I will check the old one too if I find it"

Thanks a lot for posting these pics!!!

E32 750iL 11/88, E32 750iL Highline 03/90
7 series Tech tips http://tinyurl.com/3486c

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  • The Three Balls in Regulating Valve - buffbuh 2008-06-24 11:47:18 (19 views)
  • very nice pics, Bryan, thank you very much - shogun 2008-06-06 10:15:42 (39 views)
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          • some numbers and guide (pic) - hairywithit 2008-06-08 09:56:36 (106 views)
            • the third ball, Jeff Chia's pics (url) - shogun 2008-06-08 10:19:33 (36 views)
              • 3rd Ball and arm position (pic) - JeffChia 2008-06-09 22:33:03 (82 views)
                • 3rd Ball -- thanks for the update - hairywithit 2008-06-09 23:59:28 (28 views)
                  • Lever setting - JeffChia 2008-06-10 13:57:44 (31 views)