Mercedes-Benz Forum banner

1 - 16 of 16 Posts

·
Registered
Joined
·
8 Posts
Discussion Starter #1
Hi all,

Does someone know how to change your rear wheel bearing? I have difficulties to get the bearings out.

I’m guessing the following:
Inside bearing is screwed (but not locked), and it has to be removed first by turning it counterclockwise. 4 small rectangles are holes for special purpose wrench for screwing it off. After inside bearing is off outside bearing comes out by just pulling.

However, inside bearing did not come out at least easily. So, 1. Is it screwed? 2. Should I turn it clockwise?

Yours,
DIY noob
 

·
Registered
96 E300D
Joined
·
817 Posts
I had it done to the tune of about $500

I was told that the bearing is a crush fit and it takes a spedcial tool to get it out. My mechanic had to get the tool that cost $50.

I started to do it myself but saw I was over my head very quickly.
 
A

·
Guest
Joined
·
0 Posts
u will need a pulling tool, specially for benz rear bearings. will cost u, at the "stealership", but it will still be cheaper than a thousand dollar excursion to joe blows mechanic shop. with the pulling tool. the pulling tool pulls the bearings off the axel shaft. however benz master mechanic dad says, if u are not familiar with such a job, to leave it to a professional BENZ mechanic. u can screw things up big time if u dont get the new bearing assemblys mounted exactly perfectly right, fitting loose, yet snug. for example, stripped axel shafts are only the beginning. and PLEASE dont take it to some "ford mustang" mechanic, he has just the same chance of screwing it up as u would.
 

·
Registered
Joined
·
8 Posts
Discussion Starter #4
It was total pain to get the lock screw off, whooh. It needed 2.5 meter moment shank.

Dead end again. I don’t know how to proceed.

MB-Owner-in-ind - 4/1/2005 10:51 AM
I was told that the bearing is a crush fit and it takes a spedcial tool to get it out. My mechanic had to get the tool that cost $50.
Do you have more info about this special tool, how does it work? I can’t see any hole to fit any tool :( , except there is too slits in the grooved part (to witch shaft was attached.

AMSOIL300CDT - 4/2/2005 10:43 AM
, but it will still be cheaper than a thousand dollar excursion to joe blows mechanic shop. with the pulling tool. the pulling tool pulls the bearings off the axel shaft.
Well, I don’t have a thousand dollar to spend, so easy choice :) Do you have any more information about the tool?

However, axel shaft (if I understood the meaning correctly, English is not my day job) is already loose. Both bearings are inside the wheel center. I have 240D 1983 (or 84) model.
 

·
Registered
280SE 280CE 560SEL
Joined
·
978 Posts
I've done this job on a w116 but it's the same deal. It's a very difficult job. Getting the locknut off is the easy bit - you shouldn't have needed a huge bar. The locknuts are secured by knocking the edge of them in where the four cutouts are, so you undo them by returning them to circularity with a few well-placed taps with a drift. They then unscrew easily.

After removing the bearings and replacing them with new ones on the hub in the usual way, you have to tighten the (new) locknut to a specific end-play. This is not easy: (i) you need a dial guage, and (ii) you need a lot of torque, and (iii) you have to buy the special tool that fits in to the locknut. I bought the latter from a specialist tool company in the US (sorry, I have forgotten who - try a google 'mercedes tools').

You really have to consider how much time and money you want to spend on this. If I had to do this again, I wouldn't - I would go to a junk yard and remove the suspension parts from a 123 - believe me, it's easier.

hope this helps.
 

·
Registered
Joined
·
8 Posts
Discussion Starter #6
jjl - 4/2/2005 6:41 PM

You really have to consider how much time and money you want to spend on this. If I had to do this again, I wouldn't - I would go to a junk yard and remove the suspension parts from a 123 - believe me, it's easier.

hope this helps.
Thank you for the tips. And yes I agree, no way I would start to do this again, but after so many hours spend :) it is come a point where my ’honor’ won’t allow me to quit [B)]
 

·
Registered
1985300td 1982-240d
Joined
·
2 Posts
go to http://skinnerbox.steaky.org/service/w123cd2/w123cd2/program/chassis/35-130.pdf from here go to MD's page and go from there.This should take you to a instructional page and then go to 35-130 Removal and installation of rear axle shaft flange,adjustment of bearings.
[:)]
 
A

·
Guest
Joined
·
0 Posts
if ur not in the US, then u cant exactly call the Snap-On guy, who probably would have the tool. i myself have never actually seen the tool, my info came from father. but it should fit into those grooves on the shaft, and with a screwing motion on the tool, push/pulls the assembly till the bearing just pops off. check that link above, should be real helpful.
 

·
Registered
Joined
·
8 Posts
Discussion Starter #10
[:D] DONE!


A bit of imagination needed to produce all the special tools, those witch tclark showed.

Thank you all!
 

·
Registered
Joined
·
8 Posts
Discussion Starter #11
pondscum007 - 4/3/2005 3:11 PM

can the rear brake rotors be changed without removing the bearings?
I’m not quite sure what you mean by rear brake rotors, but all the brake parts are separate to bearings.
 
A

·
Guest
Joined
·
0 Posts
of course u can change the rear brake DISCS without removing the bearings. unmount the calipers, and they practically FALL OFF. some screw removal is needed, but its super easy.
 

·
Registered
280SE 280CE 560SEL
Joined
·
978 Posts
BraveSlice - 4/4/2005 11:32 PM

[:D] DONE!


A bit of imagination needed to produce all the special tools, those witch tclark showed.

Thank you all!
Congratulations - it's quite a job, isn't it. At least those other difficult jobs on the 123 now appear a little easier!
 

·
Registered
1983 300Dturbodiesel
Joined
·
297 Posts
i finally got the rear discs off, seems they were rusted in place and i was a little lerry about giving em a good whack when i first looked at them... the new rotors and pads make a huge difference!
 

·
Registered
Joined
·
8 Posts
Discussion Starter #15
I learned two days ago, that handbrake will eat a groove to the break disks. That is the main reason why disk is not easy to take off. You can smoothen the groove by using sandpaper (machine) or something.
 
1 - 16 of 16 Posts
Top