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  #1  
Old 10-24-2011, 11:55 PM
juanesoto's Avatar
Diesel freak!
 
Join Date: Mar 2006
Location: San Jose, Costa Rica
Posts: 300
Clutch replacement questions (W123)

Hello everyone!

It's clutch time for my car, so I thought about replacing the pilot bearing (the one in the end of the crankshaft) but I'm really not sure how to remove it.
Any ideas or tips?

According to the EPC, there is a cover ring and then the bearing. However, there are no grooves or openings where I can put an extractor or at least grab the bearing.

Thanks!
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1982 W123 300D NA Euro, 300K Miles, 4-speed manual, 3.46 rear diff, early W126 front brakes, Penta rims with 205/60R15 FH900's, custom fitted (by me) audio system, more to come into the money pit... Soon to be installed: Bilstein HD, R107 front discs and 4-piston calipers, HD Suspension springs, wagon front swaybar.

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  #2  
Old 10-25-2011, 01:20 AM
tankowner's Avatar
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Location: Columbia, MO
Posts: 907
Quote:
Originally Posted by juanesoto View Post
Hello everyone!

It's clutch time for my car, so I thought about replacing the pilot bearing (the one in the end of the crankshaft) but I'm really not sure how to remove it.
Any ideas or tips?

According to the EPC, there is a cover ring and then the bearing. However, there are no grooves or openings where I can put an extractor or at least grab the bearing.

Thanks!

You need one of these - and your standard 20% off coupon to HF:

Blind Hole Bearing Puller



I'm not sure what the purpose of the cover ring is, really. If you damage it getting it out, I don't think it's a big loss.
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  #3  
Old 10-25-2011, 02:39 AM
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Join Date: Jun 2002
Posts: 296
If you don't have a puller (as above) you have a couple of other options.

1) The simplest is to knock it out hydraulically: Pack thick grease to fill the cavity behind the Bearing and Brg. bore flush. Be careful to exclude all air as you do this. Drive Brg. out with a 15mmØ steel rod & 2kg hammer refilling with grease as it moves. Hit it HARD.

2) You can improvise the extractors above with a 15mm Rawlplug, a length of threaded bar and a slide hammer.

The plug is important - it is a retainer for the bearing which is not always a tight fit in crank bore and can work its way out onto the input shaft if omitted. If I find a loose brg I always put a drop or Threadlock on it you don't want it spinning in there!.

Both bearing and plug are cheap from MB agent +/- $10 each.
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  #4  
Old 10-25-2011, 10:33 AM
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Location: Cicero, Hamilton County, Indiana about 30 miles north of downtown Indianapolis
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You can replace it if you wish, but the truth be known, that pilot bearing forever gets nothing but very light duty exercise. The only time it turns a little is when you are idling with the clutch pedal depressed. At all other times that pilot bearing is just going along for the ride - it turns at engine speed but with the clutch out, the inside and the outer ring of the bearing all turn together so the bearing surface is not being used.
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1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA

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  #5  
Old 10-25-2011, 11:08 AM
juanesoto's Avatar
Diesel freak!
 
Join Date: Mar 2006
Location: San Jose, Costa Rica
Posts: 300
Thanks for the tips guys! I'll try to remove it hydraulically first. I'll let you know the outcome...
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1982 W123 300D NA Euro, 300K Miles, 4-speed manual, 3.46 rear diff, early W126 front brakes, Penta rims with 205/60R15 FH900's, custom fitted (by me) audio system, more to come into the money pit... Soon to be installed: Bilstein HD, R107 front discs and 4-piston calipers, HD Suspension springs, wagon front swaybar.

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