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-   -   SC Steering Rack DIY Bearing Replace (http://forums.pelicanparts.com/porsche-911-technical-forum/224112-sc-steering-rack-diy-bearing-replace.html)

Shaun @ Tru6 01-28-2016 03:53 AM

This is definitely a fun and worthwhile job.

http://forums.pelicanparts.com/uploa...1453985222.jpg


http://forums.pelicanparts.com/uploa...1453985287.jpg


http://forums.pelicanparts.com/uploa...1453985581.jpg


Black oxide for the final touch

http://forums.pelicanparts.com/uploa...1453985337.jpg

bugstrider 03-07-2016 09:12 AM

SC Steering Rack DIY Bearing Replace
 
Standing on the shoulders of the "Rack Giants", I have started upon our rebuild.

This is what I started with:
http://uploads.tapatalk-cdn.com/2016...b0476f31f8.jpg

http://uploads.tapatalk-cdn.com/2016...f9d88822c7.jpg

http://uploads.tapatalk-cdn.com/2016...9dc097a07f.jpg

http://uploads.tapatalk-cdn.com/2016...1f9dc0e1ba.jpg

http://uploads.tapatalk-cdn.com/2016...b82c72c330.jpg

All parts semi-cleaned
http://uploads.tapatalk-cdn.com/2016...1488ac9caf.jpg

Steering input shaft bearing contact patch.
http://uploads.tapatalk-cdn.com/2016...f1c9e18d87.jpg

Shaft sleeve with needle bearing
http://uploads.tapatalk-cdn.com/2016...7e39c90223.jpg

Needle bearing with what appears to be a felt washer/seal. Only one was found on the high side of the shaft. I assume to prevent any nasties or water(in theory) from compromising the bearings.


Puck condition with the usual worn groove.
http://uploads.tapatalk-cdn.com/2016...b514a72aab.jpg

The initial clean stage of the rack housing. Will continue to clean parts and source replacement bearings and other options.
http://uploads.tapatalk-cdn.com/2016...4f4355b879.jpg

A big shout out to all of you who have posted in the thread. Everyone's insight and experiences are very helpful.

Cheers Bugs
"Trev"










Sent via Jedi mind trick by the cat

Kraftwerk 03-07-2016 09:53 AM

Trevor, You win, for starting on the bottom, that thing is crusty. I guess 260,000 miles has something to do with it.
It's a fun thing to re-build though.
That felt seal may have been foam... my memory is a bit hazy on it...

Shaun, Yours looks brand new! Wow. I would work on that puck a bit more maybe but other wise: Wow.

bugstrider 03-07-2016 01:05 PM

SC Steering Rack DIY Bearing Replace
 
^^^
Hahahahaha, sweet! We'll need to make a "Crusty Steering Rack" award along with "Most Improved" category too, where I would nominate Shaun. One that can be handed off every year. Shaun does exceptional work and I believe he offers a rack service too. He plated a bunch of hardware for me and I highly recommend his services.

Yeah, I was rather surprised to see the condition of the rack when I started pulling it apart. Has me wondering what surprise is lurking in the 68 912 project[emoji848]

This thread seriously motivated me to pull it and rebuild since I'm going deep on the suspension refresh. Only made sense to do this too and from the looks, I'm glad I did. The foam/felt/mystery material seal had me perplexed when I was pressing it out. It kinda started oozing out like the blob. Any suggestions on a feasible replacement? I read someone used a rubber O-ring I think.

I just dropped off the rack housing at my powder coater who I use locally. He has a tumbler he will put it in to give it a good cleaning. He made my front crossmember and front hubs look fantastic.

http://uploads.tapatalk-cdn.com/2016...3ff3065fea.jpg


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KTL 03-07-2016 01:13 PM

I'm guessing the intent behind the felt seal was to allow periodic oiling of the bearing? I think instead the bearing should be sealed top and bottom. I bought some seals from metricseals.com

http://forums.pelicanparts.com/porsche-911-technical-forum/224112-sc-steering-rack-diy-bearing-replace-5.html#post8837233

Shaun @ Tru6 03-07-2016 01:16 PM

Quote:

Originally Posted by bugstrider (Post 9027349)
^^^

I just dropped off the rack housing at my powder coater who I use locally. He has a tumbler he will put it in to give it a good cleaning. He made my front crossmember and front hubs look fantastic.

Trevor, make sure he caps each end and the center with rubber stoppers. You don't want media inside the rack abrading the brass bushings inside the body.

bugstrider 03-07-2016 01:20 PM

SC Steering Rack DIY Bearing Replace
 
Thanks! I'll check it out. Now that I look at the attached link, I remember seeing that. This thread is the thread that keeps on giving. Links to links to additional links. Just when you think you've read them all, you have missed/forgotten about another one. [emoji12]

How about attaching this thread to the "while I'm there, let's also address fuel lines". Yup, I've fallen into that precipice as well.

I will polish the steering rod in hopes of dressing up the bearing surface.
http://uploads.tapatalk-cdn.com/2016...92de0b6b16.jpg
http://uploads.tapatalk-cdn.com/2016...f500efb1aa.jpg

If my drill press was large enough, I'd put it in there and polish it with an abrasive cloth, but I don't.
Cheers Trev


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javadog 03-07-2016 01:44 PM

Maybe now might be a good time to replace that shaft bearing with the version that chris_seven makes in the UK.

JR

bugstrider 03-07-2016 03:04 PM

SC Steering Rack DIY Bearing Replace
 
JR,

I saw his product but can't seem to locate it. I literally just sent a message to another member asking. I do like his bearings. Do you have further on where to find them, web site, US distributor, etc? I'll try different search parameters to see if I get a hit.

Cheers Trev


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Reiver 03-07-2016 03:20 PM

chris_seven is in the process of rebuilding his website I believe...He's active on this site so find a thread and email him.

bugstrider 03-07-2016 03:47 PM

Quote:

Originally Posted by Shaun @ Tru6 (Post 9027362)
Trevor, make sure he caps each end and the center with rubber stoppers. You don't want media inside the rack abrading the brass bushings inside the body.


Thanks for the heads up Shaun. We had a long talk about those. I was able to clean up the housing fairly well. Looking for that ultra clean look to the housing.

I was able to remove all of the surface rust on the steering shaft. Next step, Navel Jelly...
http://uploads.tapatalk-cdn.com/2016...39d1330ff2.jpg

http://uploads.tapatalk-cdn.com/2016...591d003cd2.jpg

It's going to town on the section with the rust. Does anyone know if the black coating was just a paint type or was it a special coat of some sort? When I wire wheeled the base where it bolts to the rubber bushing, it polished up to a shinny finish.


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bugstrider 03-07-2016 06:52 PM

Quote:

Originally Posted by Reiver (Post 9027530)
chris_seven is in the process of rebuilding his website I believe...He's active on this site so find a thread and email him.

Thanks,

I actually did that earlier today hoping to hear back from him.

javadog 03-08-2016 04:36 AM

Go back a page in this thread to his comments:

http://forums.pelicanparts.com/porsche-911-technical-forum/224112-sc-steering-rack-diy-bearing-replace-5.html#post8837327

He may have sent a few parts over here, look at the posts below his.

JR

Harpo 04-01-2017 09:28 AM

Did anyone have to use any special tools to remove the bearings and the gear. I did remove the "C" clip that holds the bearing in place.

Thanks

David

bugstrider 04-01-2017 03:02 PM

Hi David,

No special tools are needed.

Cheers Trevor


Sent from my iPhone using Tapatalk

Harpo 04-02-2017 08:53 AM

Gear and bearings will not come out. I even tried warming up the aluminum with no luck. Any idea if FLAPS would have a gear puller that small?

David

bugstrider 04-02-2017 09:23 AM

SC Steering Rack DIY Bearing Replace
 
David,

I will look at my reference photos when I get home from work this afternoon. I don't recall any issues on removing but it will be later before I can check.

Trevor

Found some in my phone. Once I pulled the nut off, the gear and bearing just pushed out. You might have some corrosion in the splines and or the needle bearing, PB blaster might help.

https://uploads.tapatalk-cdn.com/201...5c0ce9086d.jpg

https://uploads.tapatalk-cdn.com/201...9d7d96019d.jpg

https://uploads.tapatalk-cdn.com/201...730a66c3ac.jpg

https://uploads.tapatalk-cdn.com/201...d93c26d219.jpg

https://uploads.tapatalk-cdn.com/201...1078df122b.jpg

https://uploads.tapatalk-cdn.com/201...0c38161942.jpg

https://uploads.tapatalk-cdn.com/201...464a5d7fe1.jpg

https://uploads.tapatalk-cdn.com/201...71546cf5f1.jpg

https://uploads.tapatalk-cdn.com/201...b52beba71f.jpg

https://uploads.tapatalk-cdn.com/201...9cf75e1d4a.jpg

Sent from my iPhone using Tapatalk

Kool-aid-82 04-07-2017 03:45 PM

16+ years of cool info, got to love PP!
Guess it is time I rebuild the rack on my 81 SC.

kcf7z 06-22-2017 04:13 AM

I have read through this and others and I just have a question for those that have done this process:

How did you reinstall the new bearings? Did you use a hydraulic press or some other way to reinstall? I do not have a press, so was just trying to determine if I need to take to a shop for help or invest in a small press for this and other projects.

Thanks for everyone's help and direction.

casor 06-22-2017 07:00 AM

Kc - no need for a press or any other giant tools to reinstall the bearings. The needle bearing should simply slip on the pinion with almost a feeler gauge amount of drag. The larger ball bearing can be tapped in using a socket of the appropriate o/s diameter of the bearing.

For the latter, make sure the bearing seating area in the rack housing is free and clear of crap and corrosion. Fine emery cloth and WD will clean this area up, but feel around for burrs that may prevent the bearing from going in level. You don't want to cock it going it - you will mung the alum housing.
Rob


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