Rear wheel bearing

1979-1991 280SE, 300SE, 300SEL, 380SE, 380SEL, 380SEC, 420SE, 420SEL, 420SEC, 500SE, 500SEL, 500SEC, 560SEL, 560SEC
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gazman
S Class
Posts: 89
Joined: Sun 10 Apr, 2016 2:16 pm
Model you own: w126
Location: Nth Dandalup WA

Rear wheel bearing

Post by gazman » Thu 21 Sep, 2017 12:46 pm

Yesterday I replaced my accumulators, noticed that L/H wheel bearing had an unacceptable amount of movement, a few google sessions later an I'm seeing dial gauges, special tools. So I guess the question is can it be done at home or is it a shop job. Surely one of you has done it any tips tricks or bewares greatly apprciated
1989 560 SEL King of the road

newMercowner69
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Joined: Tue 24 Feb, 2015 5:00 pm
Model you own: w202
Location: Melbourne, Australia

Re: Rear wheel bearing

Post by newMercowner69 » Thu 21 Sep, 2017 5:46 pm

Unless you have access to a bearing press it's a job best left to either a specialised independant MB mechanic/workshop,
This ONLY applies to DR BB (double row ball bearing) which depending on your model&year is a A/C (angular contact) &is pre-loaded from the bearing manufactuer,
If it's tapered roller type (doubt it) then you 1st have to remove the hub &tap around the circumference of the cup with a brass/steel drift or cold chisel/screw driver.The cone will be able to be pulled out now to fit/insert both the cone&cup,
You can either pay a MB mechanic to press it into the hub or you can do it yourself using a socket slightly bigger than the outside of the cup (where the cone (cage with rollers) sits into &tap on the edge using a bit of hardwood DO NOT tap on the cup itself.Don't forget to both grease both the cone&cup &either re-grease or fit new seal,\I can quote you on a bearing or complete kit inc seal if you like?,
We may even be able to press the bearing for you,
Regards,
Adrian.

gazman
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Posts: 89
Joined: Sun 10 Apr, 2016 2:16 pm
Model you own: w126
Location: Nth Dandalup WA

Re: Rear wheel bearing

Post by gazman » Wed 27 Sep, 2017 4:58 pm

I've had another thought, change out driveshaft assembly complete with wishbone attached. My question. . . . my hopefully parts car is an 86 my driver is a 1989 both gen 2 . can anyone shed light :dontknow:
1989 560 SEL King of the road

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MMWA
450 SEL 6.9
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Re: Rear wheel bearing

Post by MMWA » Wed 27 Sep, 2017 6:34 pm

same procedure on the w116 6.9 which I've done before - its a f-ing nightmare.

I still have the special slot nut driver to prove it. The bearing is preloaded by way of crushing a sleeve under enormous torque on the flange when tightening the slot nut on the inside, similar to the way differentials pinions use a crush sleeve to set preload. no room for error has to be perfect the first go.

WAY easier just to find another same version control arm and swap the whole damn thing over.

Theres 2 versions, povo and high end, the better version has anti squat and floating caliper, the arm itself is cast aluminium. The povo version is welded steel and much simpler.

Obviously has to be swapped like for like.
MMWA

CraigB
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Re: Rear wheel bearing

Post by CraigB » Wed 27 Sep, 2017 9:47 pm

I've never seen a 560 with 'povo' arms so i would be pretty confident that they would be a straight swap.
Craig Baulderstone
Lurch
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MMWA
450 SEL 6.9
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Location: Perth

Re: Rear wheel bearing

Post by MMWA » Thu 28 Sep, 2017 11:07 am

CraigB wrote:
Wed 27 Sep, 2017 9:47 pm
I've never seen a 560 with 'povo' arms so i would be pretty confident that they would be a straight swap.
correct, povo version was mainly on the 6's and smaller v8's from memory
MMWA

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