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Driveshaft Support (carrier) Bearing Replacement

on the 1982 240D (W123)

by Scott98

4/16/09



How to replace the driveshaft support (carrier) bearing - A step by step guide


Step 1: Mark the relative positions of the front and rear driveshafts. Also mark the relative positions of the front and rear flex discs.
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Step 2: Get a 46mm and 41mm wrench and loosen the sleeve nut located on the front section of the shaft.
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Step 3: Remove the front flex disc and compress the driveshaft.
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Step 4: Remove the front portion of the drive shaft.
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Step 5: Remove the two 13mm bolts on the carrier support bracket.
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Step 6: Note the circlip. You will need to remove this later.
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Step 7: Remove the rear flex disc and remove the rear portion of the drive shaft.


Step 8: Picture of front and rear driveshafts removed and associated parts. The broken portion of my carrier bearing and bracket are still attached to the rear driveshaft.
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Step 9: Remove the circlip. Get a large three jaw puller and remove the carrier bearing.
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Step 10: Picture of rear driveshaft with old carrier bearing and bracket removed. Also pictured are the new carrier bearing and bracket.
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Step 11: Press the new carrier bearing into the bracket. I lubed the bracket with dishwashing liquid and pressed the carrier bearing in with my hands.
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Step 12: The new carrier bearing and bracket are installed on the driveshaft. Don't forget to reinstall the circlip! The bracket has a shoulder which must face the rear of the car upon installation. The bearing rests against the shoulder when you press it into the bracket. Picture it like this - if you were to pull the bracket off the driveshaft, it would take the carrier bearing with it.
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The last picture is of the gigantic wrenches you will need. Many of your parts/bolts may be rusted in place so be patient. My rear flex disc was seized to the driveshaft so I had to remove the flex disc from the differential to get it out of the car. You may be luckier than I was. Make sure you realign everything to match the marks you made upon installation so nothing is out of balance.
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Good luck!

Scott



Discuss this DIY here.

-Scott98

CategoryDiy
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