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[polilara]

Hello all
I am going to change the rear wheel bearing in the near future without taking away the suspension arm. I understood that the suspension arm have a flanger and the bearing have to be pulled out. I will make the tool by myself by using M20 thread etc. Could anyone inform what is the minimum diameter of the hole in the suspension arm. The bearing outer diameter seems to be 74 mm and the thickness of the outer sleeve of the bearing is 2.5 mm. Thus the minimum hole/flange inner diameter in the suspension arm shoul be something between 69 mm and 74 mm but how much it is ? This info is neede when making the puller tool as I want to have everything ready before I start this job.

[2woody]

it is VERY tight. M20 will not be enough.

Why not take off arm ? it is much easier - you can take the item to the garage and et the bearing pushed out in a press

[kcl]

I don't have the measures for the puller but nearly anything larger that the inner dia will do  And M20 will be enough, I've used M12 and have done three without any problems with thread.

Have to mention that I have had the best of luck with these three, none have been really stuck so what Woody suggested should really be concidered as an option. With the arm on the car you WILL damage something.

[Marks DTM Calib]

I have done a few now, only one of them I had to remove the arm on.

I normaly use a three legged on the back to pull the rear drive plate off and then use a drift and hammer to drive the outer hub flange out.

The outer flange normaly takes with it the inner race and if you put a slot in this with a grinder, a quick hit with a hammer+chisel splits it. Then its a case of getting the large circlip out.

The outer race is the harder bit. A hammer and chisel working from behind the hub normaly does for it but on one occasion, I did have tor emvoe the rear arm and get 'heavy' with it.

Do get the new bearing in the freezer the night before as that makes it so much easier to fit, you can also warm the hub up to (not to much though!)

[polilara]

Thanks for all comments and tips. Actually I try to do the job without taking the arm away. So, in the outer side there is a circlip and in the inner side there is a flange which hold the outer race and the bearing in its position. It is fully clear that the outer part of the puller have to be larger in diameter than the bearing (74 mm) but what should be the diameter of the part which is located in the inner side of the arm. That part have to be slightly smaller than the flange in the arm. Perhaps 73 or 72 mm. I would like to have everything ready when I start this task.