'82 240d (manual trans) Grinding/Clunking on acceleration - Page 2 - PeachParts Mercedes-Benz Forum

nickypno · #16 10-15-2015, 02:33 PM

Wow, luckily I got one of those centering bushings when I placed my order for the flex discs and center support + bearing. Hopefully I only need to replace it on the side that has the completely failed disc.

I dropped the tranny mount to access the broken front flex disc and found the rubber tranny mount is also deteriorated extremely, and softer than a baby's bottom. Also have that replacement part luckily.

nickypno · #17 10-16-2015, 12:59 PM

Im having one hell of a time trying to get either of the flex discs un-seized from the flanges..

Anybody got a tip?

Stretch · #18 10-16-2015, 01:09 PM

Quote:

Originally Posted by nickypno

Im having one hell of a time trying to get either of the flex discs un-seized from the flanges..

Anybody got a tip?

I'm afraid the only way i know of is to use thin flat blade screw drivers.

Not the right tool for the right job at all (I'm ashamed to admit).

Make sure you kill the flex disc and not the yoke.

When fitting new flex discs apply a wafer thin layer of copper ease / anti-seize to help the next person who is going to be going this job (and if it is you you'll be very glad you did it!)

nickypno · #19 10-16-2015, 01:38 PM

Cool, I got the little devils out of there with some persuasion and now have the driveshaft disassembled.

The old center support bearing in there sounds awful when spun, and the outer portion of the center support was completely broken off of the center that holds the bearing.

The center support bushings on either side look completely fine surprisingly, and the U-Joint has no play in it so it seems fine.

On go the new flex discs, center support, and bearing....

nickypno · #20 10-16-2015, 03:30 PM

Is there some trick to get the new bearing onto the driveshaft?

After installing the bearing inside of the new support, I try to push it onto the shaft and end up pushing the support off of the bearing.

Beyond that, I can't even get the bearing past the notch on the end of the shaft that the circlip is supposed to sit under. It just keeps getting stuck and I don't want to damage the bearing by pushing on it too hard.

leathermang · #21 10-16-2015, 04:12 PM

I can not visual the situation
so I am going to give generic advice..
really really clean the items going together... like 1000 grit sandpaper..check for burrs....
lightly oil the things going together..
consider slightly warming or cooling those items you need larger or smaller... or a combo of both if you can...
sometimes dry ice is actually used in serious situations.... and electric heat guns are very nice compared to having to use a torch...

Stretch · #22 10-16-2015, 04:15 PM

Quote:

Originally Posted by nickypno

Is there some trick to get the new bearing onto the driveshaft?

After installing the bearing inside of the new support, I try to push it onto the shaft and end up pushing the support off of the bearing.

Beyond that, I can't even get the bearing past the notch on the end of the shaft that the circlip is supposed to sit under. It just keeps getting stuck and I don't want to damage the bearing by pushing on it too hard.

Use a hammer and punch to carefully tap the inner section of the bearing in place like this =>

Don't forget the bearing shield caps

Achtung - Das schweinhund baby benz thread

(OK that's a W201 but it looks much like your W123)

Stretch · #23 10-16-2015, 04:19 PM

Forgot to say DIY here =>

PeachPartsWiki: Driveshaft Support (carrier) Bearing Replacement

leathermang · #24 10-16-2015, 04:21 PM

Use as wide a punch as you can fit there....and use brass or bronze if you have it...
you want to push it in ... not flare it... although the race is very hard...
If you have a clean pipe of the exact size....
put it down over the splines and it will be easy to press it in straight...

nickypno · #25 10-16-2015, 04:45 PM

Alrighty, got the new bearing on with some hot + cold and a punch.

Now, do I need to grease the splines on the shaft before reinstalling?

charmalu · #26 10-16-2015, 06:42 PM

When I replace/remove an old Disc, I spray it down good with Kroil (penetrating oil) and let it sit a bit.
Then use a pry bar to get them off. Never damaged a Yoke yet.

For the center Support bearing I have a piece of Exhaust tubing of proper size, place a large Socket over it and drive it on.

Charlie

sent from my pos computer

cooljjay · #27 10-16-2015, 06:58 PM

Yes you want to clean the splines....very good and then use about a table spoon of grease on the splines before reassembling....You also want to do this for the centering bearings that are on each end of the drive shaft.....Also don't forget the new boot to protect the grease from road gunk...

nickypno · #28 10-16-2015, 08:12 PM

So I managed to put the transmission mount on the bracket the wrong way, and then one of the bolts on the underside of the mount, which I installed before realizing I installed it the wrong way, stripped and now I can't get the tranny mount out of the bracket.

Any ideas of what I should do?

leathermang · #29 10-16-2015, 08:48 PM

Pictures might help for us who do not know what it looks like off hand.....
make them with good light...
and put a little pointer showing what you are referring for better faster help....
So the bolt stripped and thus will turn in the counterclockwise direction but does not back out ?

nickypno · #30 10-16-2015, 09:00 PM

I included two pictures, one showing the position of the seized bolt from each side.

And yes, it will turn counter clockwise and clockwise, but without tightening or loosening at all.