help pilot bearing into 617.952 - PeachParts Mercedes-Benz Forum

winmutt · #1 03-04-2007, 02:55 PM

Swapping a manual into a 300D turbo, Im trying to get the pilot bearing back in and its in but its binding. I assume its supposed to turn freely. I verified it is a 6202 bearing.... What to do?

#2 03-04-2007, 03:04 PM

This is your problem and solution: http://www.peachparts.com/shopforum/showpost.php?p=582003&postcount=15

He told me that late 84 and all 85's have a smaller diameter pilot bearing hole. I got lucky with my engine. It was from an 84 300SD (transplanted into my TD from a past owner) but it took a standard pilot bearing without problems.

winmutt · #3 03-04-2007, 03:09 PM

Crap I just read your msg past the link. Anyone know what the correct size is?

#4 03-04-2007, 03:23 PM

There are 84 and 85 euro 300D's with manual tranny's. Maybe somebody with access to the EPC can find the right bearing he needs.

winmutt · #5 03-04-2007, 07:30 PM

Nothing a pneumatic grinder couldnt take care of.

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Chas H · #6 03-04-2007, 07:45 PM

If you got the bearing into it's bore you have the right size bearing. There is no bearing slightly smaller. A 6202 is a medium duty bearing with a bore of 15mm and OD of 35mm. A light duty bearing of the same bore would be numbered 6002 and have an OD of 32mm.
If the bearing does not turn freely it has been damaged or contaminated.

#7 03-04-2007, 07:53 PM

I can also fit a bearing into a hole 0.080 too small to accept it. That does not mean it's the right one.

Stevo · #8 03-05-2007, 12:36 AM

As I remember the 84s have a 34mm pilot hole, instead of the 35mm like other 240Ds

winmutt · #9 03-05-2007, 06:29 AM

Quote:

Originally Posted by Stevo

As I remember the 84s have a 34mm pilot hole, instead of the 35mm like other 240Ds

34mm? I ony took off 1/4mm all the way around and it fits.

Stevo · #10 03-05-2007, 10:32 AM

Quote:

Originally Posted by winmutt

34mm? I ony took off 1/4mm all the way around and it fits.

I dono, Yours is an 85 so that would be the last two years of the 123 with a smaller pilot hole. If a 1/4mm made her fit, sounds like your good too go. I havent had the opportunity to get into any clutch or tranny work on my 85 but I will keep this thread in mind. good luck

winmutt · #11 03-05-2007, 11:47 AM

Quote:

Originally Posted by Stevo

I dono, Yours is an 85 so that would be the last two years of the 123 with a smaller pilot hole. If a 1/4mm made her fit, sounds like your good too go. I havent had the opportunity to get into any clutch or tranny work on my 85 but I will keep this thread in mind. good luck

I used a air grinder with a cone shaped bit on it. I ran the grinder near perpendicular to the bearing to grind a small channel in the middle and then parallel to take the lip off.

Stevo · #12 03-05-2007, 04:01 PM

You have that little "cup' shape keeper with the hole in the middle (for the tranny shaft) that keeps the bearing in place?, you might have to whittle that down a shade too.