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| D2 - Axles, Brakes, Suspension and Steering Brakes, Springs, shocks, steering racks, steering columns, suspension arms, wheel hubs etc. |
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Thread Tools | Display Modes |
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#1
3rd December 2022, 02:43 PM
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Servotronic module wiring? And a bad plan
I love the D2s .. at the moment am at a place I hope you have been already..
MikkiJayne's ExxonMobil Valdez has my exact issue: The steering servotronic module: mine rotted right through the cover have a new(er) one with a connector (from a BMW) with10" of cable that all fits... where does the other end plug into ? Want to pull it all out and crimp and shrink tube it right.. Second question: the teenage monkey that pulled a used rack for me opened the cover where the lash adjustment is set(?!) Why will never be determined. The cover on this unit was not marked or pinned so opened right up. And it appears the internal spring is gone now. Have dial indicator and the zf manual for the rack and was considering measuring the backlash in my violently leaking old rack and moving the spring and setting up the newer rack to be identical. Trying to figure out how to hold it correctly.. Am I crazy? Thanks for the read. 2002 D2 S8 235k miles So many things done I've lost track 
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#2
3rd December 2022, 04:20 PM
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The connector is behind the rear half of the arch liner. The control module is the relay box in the passenger footwell.
Why are you replacing the whole rack if its just the control valve that has rotted out? Once the rack is out of the car its only two M5 bolts to remove the valve and you can just swap in the BMW one. I'd be very interested in seeing the ZF manual for the rack if you'd care to share it 
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#3
3rd December 2022, 05:45 PM
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The boots were full of fluid also so seals are shot.. newer rack was nice and dry but module wires torn off right to the nub..
I will find and post manual shortly.. Essentially rack placed in fixture holding tie rod ends then rubber plug pulled. Drop dial indicator within and move column connector to measure lash. Screw cover int/out..When tolerance range met pin cover with punch. I'm willing to give it a go..
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#4
3rd December 2022, 07:04 PM
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Cool thanks.
Worth a shot swapping parts between the two then since they aren't easy to come by these days. I need to do the same with one of mine too as it turns left better than it turns right so something internal is broken hence my interest in the manual 
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#7
4th December 2022, 06:06 AM
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Both useful thanks
Looks like I have some special tools to make 
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#9
4th December 2022, 10:00 AM
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Done and Done!
__________________
Conan (the Librarian) Watch it if you dare Currently, 2000 S8, Merlin Purple, Leather Pack 1, Winter Pack 1, SPAX adjustable suspension, AP Racing 6 pot front caliper, 385mm fully floating disks, EBC Yellow Stuff Pads, Black Diamond grooved rear disks and predetor pads, D2 Doctors Brake Block. 1997 4.2 A8SQ - the Projekt. 12 years and ongoing! 1997 4.2 A8SQ - Ming Blue. Restoration sat waiting; saved from the Scrapyard 2003 C5 Allroad 4.2Q - Cobolt Blue. Towing car. Laid up awaiting manual conversion. 2005 C5 Allroad 2.5TDi FE - Grey - Workhorse. 2015 Q3QS SLine - Daytona Grey. Lots of extras! Long Haired Admirals cutter. Previously 2003 C5 A6 1.9TDI FWD - Loaner from D2 Doctor Lifex 1997 S8 - Ming Blue. Loaned out and written off. I loved that car. My first engine swap after cambelt failure. 1996 4.2 A8SQ - Ming Blue. 178k on a cambelt! Trader's 8. Delivered to A8Parts at Lifex. 2003 2.8 A8SQ - powder blueish. Fill in for a while. Sold on. 1998 1.8T A4 Avant FWD. Ming Blue (there's a theme here), PEX for the 97 S8. And a list of non VAG going back 40 years before I saw the light.
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#10
16th January 2023, 03:01 PM
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Well this is not going according to plan.. Got spring swapped over and screwed in cover to to about the same spot as other rack. Appears to not have any slop in the lash when pinned to the bench but have not figured out a way to properly hold the dial indicator to be sure..
Bigger issue: Found a module that was sold as a ZF 7039 442 102 but instead I was shipped a 7039 442 214. This is different in that it has the cylinder shape and the diameter of the outermost seal is too wide for the recess in the rack. Has the correct BMW connector however. I cannot find a 7039 442 102 to buy anymore, nothing in stock. New ones are insane$ and not available either or wont ship to the states. Considering machining an adapter to go from the approximately 22mm diameter outer ring to the 15mm on the rack and get on with it. I can troll the junkyards for a 2000ish 5 or 7 series BMW, an Jag xjs or xj6 to rip one off of? other makes? Or is there another direction? Oher part #s I struck out with: LEMFÖRDER 1063401 ZF 32411134770 BMW 7 series etc... jaguar JLM12142 Last edited by Heavy351; 16th January 2023 at 03:07 PM.
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Linear Mode
