zefke

Hello Sharklovers,

I have been looking at renewing the Rear Wheel Bearings of my 1984 928S2 for a while.

I watched the video's with the B90 Toolkit, and its operation looks really great. However I could not get the tool in the Netherlands. So I finally tried an alternative way. And it worked!!

To remove the wheel hub, I used a 2.5 kg sliding hammer, and I must say this was really easy, a few blows and it came off. I took a video of this and placed it on You-Tube:


After that, I used a standard Bearing removal tool, but unfotunately it did not have a large enough drum to capture the 85mm large Rear Wheel Bearing of the 928.

So I needed something to create enough space to pull out the bearing. Luckily Porsche supplied this tool with the car .

I took the wheel hub and mounted it the other way around on the brake-disk. The disk is large enough to get the required support and the hub has the perfect inner size to hold the spindle. And it worked very well. I also took a video of this and placed it on You-Tube:



So if the B90 toolkit is not available this is a very nice alternative to do the job!

shark greatings
Paul

911tracker85

good idea. I had used the big slidehammer to also remove the inner bearing on my 911. I had the same issue, now to brace the puller on the outside.

here is a pic of my expensive tool I made to press the hub back in.

this may be my next project for my 84 928.

thanks.

zefke

Bob,

I tried the sliding hammer on the bearing as well, but it is too darn tight. I don't know how it is on the 911, but on my car it didn't move at all!!

Your tool is great, but I wonder wether it would be enough to pull the bearing out on the 928, that one is really stuck in there!!

take care
Paul

Bilal928S4

I just saw both the cvideo's but did not see the bearing come out. The video ended before that happened. Do you have acomplete video?
Thanks for posting.

Bill Ball

Nice. Please show us how you got the bearing and hub back in too. I have the B90 tool, but I don't like the big yoke that it uses for pulling the hub.

zefke

Hello Bilal,

Unfortunately the SD card was full before the bearing came out completely. But believe me it came out!
As you can see in the video, I mounted the spindel the wrong way. When it came out the front nut, I couldn't use the ratchet anymore from the front so I had to use the adjustable wrench on the front. So I switched the tools, but when the bearing advanced further to the front the ratched could not reach te back nut and I finally had to use the extension to reach it....

Hello Bill,

Getting the bearing and hub back in is no problem. Using a spindle and some plates in the correct size will do the job. I din't film it because I didn't think anybody would be interested.

If there are more people who want to see this. I still have to do the right side of the car. Let me know!!

Shark greetings
Paul

Bilal928S4

Paul,
Thank you for the info. I think it would be even better if you can also list all the sizes of bolts, washers and nuts that you used so that the same can be locally sourced. Again thanks for the great info.

911tracker85

on the 911 it took quite a few whacks to get the bearing out, and as usual for such projects HEAT is your friend. and with the 911, the problem I had was not having the right type of bracket to brace the puller on the outside of the hub. so I will remember your solution if/when I do the rear bearings on my 928.

my long bolt was just to press the stub axle back in.

fortunately I may have figured out the slight vibration I am feeling that caused me to replace my front bearings and wondering if I need to replace my rear.

for some odd reason, I think I am just feeling engine vibrations when I turn to the right. was coasting down a winding road recently and realized I was not feeling the vibration when turning to the right. since then retested the hypothesis, and whenever I am not on the gas I do not feel the vibration.

this past winter, did MM, OPG, rack bushings, lower ball joints, tie rod ends, shocks, headers/exhaust, and some stuff I am forgetting. so when I got it running and aligned, noticed the 'new' vibration and began wondering if a bearing or what did I mess up. had the alignment done at the Porsche dealer who has an 'older' tech who knows old 911s and 928s. did not find any issues with my work, and said he did the alignment without any issues.

zefke

Hello Sharklovers,

I installed genuine Porsche Bearings (P/N 999 053 055 02), however these new (Japanese) bearings did not have rubber seals on the outside, the old SKF ones did. Also what surprised me is that on the SIR tools video the inner race was stuck on the hub. Both inner rings stayed in the bearing when I pulled the hubs with the sliding hammer. With the SKF bearings you can not remove the inner race from the bearing if you pull on it straight, only if you tilt the inner race you can take it out.

As some of you wanted to see the installation of the Rear Wheel Bearing and hub as well, here are the video's of the right side, using a spindel with nut, two different size plate's and the car's old bearing.

I didn't use any heat, but I did put the new bearing in the freezer (-18degree C), actually I'don't think this is really necessary. I used a 24mm spindle with nut, a 84mm plate on the back and the old bearing on the front, but this can better be done the other way round, because with the final turns the old bearing got a little stuck on the front side. In the back there is more room, so it won't get stuck. I had to hammer it left and right to get it back out again.

Important is to PRESS the new bearing ONLY on the OUTER RING and not on the inner ring, as this could damage the race.



For the installation of the rear wheel hub I used a 24mm spindle with nut and a 73mm plate on the back.

Here it is important to PRESS only on the INNER RINGS, the hub presses on the front inner ring, so the plate needs to push on the back inner ring, otherwise the race's could be damaged.


Shark greetings
Paul

Tom in Austin

Just like pulling out or pushing in the little bearings for the flappy valve and the throttle shaft ... just on a larger scale. Amazing the force you can produce turning a nut on a threaded rod ...