Author Topic: Axle shaft bearings query  (Read 3569 times)

swood1

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Axle shaft bearings query
« on: October 17, 2019, 08:42:50 »
Hi all,

I have removed both my axle shafts from the differential, just looking at the play in the bearings.  Is there a defined way to check them?  I can initiate some rocking between the inner and outer race in both bearings.  Is this normal?  I cannot see any movement vertically between the inner and outer race.

The car was a project and not running when I acquired it.


Steve
250 SL (early), in bits. Triumph TR4a

swood1

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Re: Axle shaft bearings query
« Reply #1 on: October 17, 2019, 12:40:11 »
I just found some details in the Technical Manual.  I didnt realise the RH and LHS bearings were different.  This clarifies why one of my bearings was showing alot more side movement than the other. 

Steve
250 SL (early), in bits. Triumph TR4a

Benz Dr.

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Re: Axle shaft bearings query
« Reply #2 on: October 17, 2019, 15:09:17 »
Pretty much normal for the right hand side with the self aligning bearing to have a bit of end play. Not so much for the LT side.
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

ja17

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Re: Axle shaft bearings query
« Reply #3 on: October 17, 2019, 15:27:08 »
Best to replace all the bearings and seals while the unit is apart and you will not have to do it again in the near future. Original brands are available from after-market resources for big savings on the parts. In any case, if you slightly pinch the bearing in a vice and rotate the axle, if bad, you will feel the bad spots in the bearing as the axle turns. Pinching the bearing in the vice simulates a load for testing the bearing when the axel is turned.
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

swood1

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Re: Axle shaft bearings query
« Reply #4 on: October 17, 2019, 16:42:15 »
Thanks Joe,

I shall do some searching of the forum for the two bearing part numbers.  Out of interest do you know if the bearing seals are off the shelf items also?   


Steve
250 SL (early), in bits. Triumph TR4a

Benz Dr.

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Re: Axle shaft bearings query
« Reply #5 on: October 17, 2019, 17:25:13 »
I think they're more likely to be MB parts. Most bearing places you go to will be industrial application only and if certain pieces cross over to automotive that's incidental. Some automotive seals and bearings are propiretary so industrial and automotive operations generally steer clear of each other. 
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

1970  3.5 Coupe
1961  190SL
1985   300CD  Turbo Coupe
1981  300SD
2013  GMC  Sierra
1965  230SL
1967 250SL
1970 280SL
1988 560SEC

ja17

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Re: Axle shaft bearings query
« Reply #6 on: October 17, 2019, 21:04:00 »
For instance, here is the kit for the left side...………

https://www.ebay.com/itm/1960-s-Mercedes-Rear-Axle-Bearing-Kit-108-109-110-111-113/293116552656?hash=item443f1ba5d0:g:HdwAAOSwKF1c~XfB

Order two of those kits since the seals and gaskets are the same on both sides, but use only one "ball bearing" for the left side. Get the special expensive "centering bearing" by itself.
« Last Edit: October 17, 2019, 21:19:35 by ja17 »
Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback

Pawel66

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Re: Axle shaft bearings query
« Reply #7 on: October 18, 2019, 06:54:08 »
Thanks Joe,

I shall do some searching of the forum for the two bearing part numbers.  Out of interest do you know if the bearing seals are off the shelf items also?   


Steve

From EPC:
A 002 981 23 01 this is left
A 000 981 05 06 this is right; this is the self-centering one (over $100 at MB)

There is quite a lot about it on our Forum:
https://www.sl113.org/forums/index.php?topic=2163.msg11244#msg11244
https://www.sl113.org/forums/index.php?topic=18315.msg128000#msg128000

Pawel

280SL 1970 automatic 180G Silver
W128 220SE
W121 190SL
G-class

UJJ

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Re: Axle shaft bearings query
« Reply #8 on: October 18, 2019, 13:46:46 »
For your Info:
The right side bearing is a spherical roller bearing "20208-TVP".
I do have an extra one made by FAG, but shipping to Europe is probably not feasible.
Just in case, I am asking $80.00 for it.
Urban Janssen
Grass Valley, CA
1968 280 SL - 4speed manual
173 anthracite grey

swood1

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Re: Axle shaft bearings query
« Reply #9 on: October 18, 2019, 14:40:28 »
Thanks UJJ,

I have picked that up from some of the other forum posts and Pawels links. 

I have asked for a quote from MB direct as I want new seals also, I can then compare costs to buying the bearings and seals seperate.  I shall let you know if I would like your bearing but I think import duty from USA would kill it :(




Steve
« Last Edit: October 18, 2019, 14:48:28 by swood1 »
250 SL (early), in bits. Triumph TR4a

dirkbalter

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Re: Axle shaft bearings query
« Reply #10 on: October 22, 2019, 16:19:46 »
Urban,
I am interested in the bearing if still available.
Let me know.
Thanks
Dirk
Dirk
66 230 SL
70 280 SEL
53 CHEVY 3100
18 C300 COUPE
05 HD FLSTNI

UJJ

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Re: Axle shaft bearings query
« Reply #11 on: October 23, 2019, 13:41:12 »
Hi Dirk
yes, still available. PM me
Urban
Urban Janssen
Grass Valley, CA
1968 280 SL - 4speed manual
173 anthracite grey

ja17

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Joe Alexander
Blacklick, Ohio
1969 Dark Olive 280SL
2002 ML55 AMG (tow vehicle)
2002 SLK32 AMG (350 hp)
1982 300TD Wagon turbo 4spd.
1963 404 Mercedes Unimog (Swedish Army)
1989 flu419 Mercedes Unimog (US Army)
1998 E430
1974 450SLC Rally
1965 220SE Finback