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Re-packing wheel bearings by age? #4755466
05/12/18 11:08 PM
05/12/18 11:08 PM
Joined: Dec 2002
Posts: 42,625
New Jersey
JHZR2 Offline OP
Global Moderator
JHZR2  Offline OP
Global Moderator

Joined: Dec 2002
Posts: 42,625
New Jersey
My 81 240D will be coming back out for family weekend use (beach trips) as soon as the rains pass.

It is all original. Original brakes (not hoses), and the car is set up so rotor replacement requires removal of the axle nut and re packing the bearings.

So the grease in there is original too...

It's a fairly closed environment, I guess. Not sure how badly the grease could oxidize over time without any real air exchange.

But should I consider re packing st least the front wheel bearings? How much is time a factor here?

Thanks!

Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755488
05/12/18 11:56 PM
05/12/18 11:56 PM
Joined: Aug 2008
Posts: 3,459
Where the wind comes sweepin'
Reddy45 Offline
Reddy45  Offline

Joined: Aug 2008
Posts: 3,459
Where the wind comes sweepin'
Original grease pack on a 1981 vehicle? Yeah I'd put in some fresh grease.

Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755497
05/13/18 12:41 AM
05/13/18 12:41 AM
Joined: Jan 2017
Posts: 2,521
VW Fanboy Island
maxdustington Offline
maxdustington  Offline

Joined: Jan 2017
Posts: 2,521
VW Fanboy Island
Keep it all original, baby.


03 Jetta AWP/09A 205k kms
Edge 0W40 + Mann 719/30
Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755508
05/13/18 01:32 AM
05/13/18 01:32 AM
Joined: Feb 2013
Posts: 11,342
Phoenix, AZ
Nick1994 Online content
Nick1994  Online Content

Joined: Feb 2013
Posts: 11,342
Phoenix, AZ
Definitely repack them. Wear good disposable rubber gloves to repack the bearings, or get a bearing packer, either way wear gloves, it's messy. Watch a video on how to do it and get new seals, it's an easy job. Once you do one side, the other side will be twice as fast. Maybe 1-2 hours to do both sides?

Also learn how to tighten the axle but. Usually you don't have to tighten them down much, just a little snug until the wheel has some drag, then loosen and put in the cotter pin.


2015 Hyundai Sonata 2.4L 92k STP Synthetic HM 10w30 & Wix
2000 Toyota Camry 2.2L 233k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 148k Mobil 1 HM 10w40 & Fram Ultra
Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755511
05/13/18 01:39 AM
05/13/18 01:39 AM
Joined: Apr 2016
Posts: 814
Specific Ocean
Kibitoshin Offline
Kibitoshin  Offline

Joined: Apr 2016
Posts: 814
Specific Ocean
Seeing unitized hubs fail because of no way to service or lube them I wish for the old-school hub and spindle design.

Definitely repack them and change out the seals too.


Shin Gekiretsu Shin'ou'hou
01 Toyota Tundra 2WD V8 4.7L
02 Chevy Silverado C1500 V8 5.3L
Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755575
05/13/18 05:54 AM
05/13/18 05:54 AM
Joined: Nov 2006
Posts: 21,240
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,240
MA, Mittelfranken.de
About an hour each if all goes well. While you can adjust the hub nut by feel and it works its a little Mickey Mouse. hide MB has a spec for that you check with a dial indicator. It was set that way almost 40 years ago so I guess it works.

If time permits pull it apart and check everything out like caliper seals and splash shields and take care of anything not up to snuff. I would clean and repack with new seals at this age. USE MB green 2989005110 or a 265.1 approved grease, the yellow from back then has long been discontinued AFAIK.
Before anyone chimes in with just use valvoline or this or that one, MB has a spec and a short approved list, there maybe something to it or maybe not but its always safe to use approved products.


ASE L1, Master. Deutsch Meisterbrief.
Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755620
05/13/18 07:45 AM
05/13/18 07:45 AM
Joined: Dec 2013
Posts: 2,099
socal
barkingspider Offline
barkingspider  Offline

Joined: Dec 2013
Posts: 2,099
socal
Yes, repack w new grease


06 Cadillac Escalade Ext
17 Cadillac ATS (wife)
05 Toyota Camry (daughter)
11 GMC Canyon off-road (daily)
Re: Re-packing wheel bearings by age? [Re: Nick1994] #4755662
05/13/18 08:26 AM
05/13/18 08:26 AM
Joined: Dec 2016
Posts: 7,997
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,997
Waco, TX
Originally Posted By: Nick1994

Also learn how to tighten the axle but. Usually you don't have to tighten them down much, just a little snug until the wheel has some drag, then loosen and put in the cotter pin.


That would end up being a tiny bit loose.
You should see how we torque roller wheel bearings on large aircraft where the tire/wheel assembly is several hundred pounds. You would never believe they would be torqued so tight!

Too loose destroys rollers bearings FASTER than too tight.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755664
05/13/18 08:27 AM
05/13/18 08:27 AM
Joined: Dec 2016
Posts: 7,997
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,997
Waco, TX
OH, always always always always always tighten roller bearings while in motion.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Re-packing wheel bearings by age? [Re: Linctex] #4755710
05/13/18 09:33 AM
05/13/18 09:33 AM
Joined: Nov 2006
Posts: 21,240
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,240
MA, Mittelfranken.de
Originally Posted By: Linctex
Originally Posted By: Nick1994

Also learn how to tighten the axle but. Usually you don't have to tighten them down much, just a little snug until the wheel has some drag, then loosen and put in the cotter pin.


That would end up being a tiny bit loose.
You should see how we torque roller wheel bearings on large aircraft where the tire/wheel assembly is several hundred pounds. You would never believe they would be torqued so tight!

Too loose destroys rollers bearings FASTER than too tight.


You cant compare aircraft to the type used on this car, the ones on aircraft are not adjusted by the center nut. Tightening the center nut does not alter the bearing preload.
A tight bearing will fail much faster than a slightly loose one.
MB cars spec .01 mm - .02 mm play at the hub.
Yes you can do it by feel but done right the bearings will go a very long time without service,


ASE L1, Master. Deutsch Meisterbrief.
Re: Re-packing wheel bearings by age? [Re: Nick1994] #4755765
05/13/18 10:31 AM
05/13/18 10:31 AM
Joined: Dec 2002
Posts: 42,625
New Jersey
JHZR2 Offline OP
Global Moderator
JHZR2  Offline OP
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Joined: Dec 2002
Posts: 42,625
New Jersey
Originally Posted By: Nick1994
Definitely repack them. Wear good disposable rubber gloves to repack the bearings, or get a bearing packer, either way wear gloves, it's messy. Watch a video on how to do it and get new seals, it's an easy job. Once you do one side, the other side will be twice as fast. Maybe 1-2 hours to do both sides?

Also learn how to tighten the axle but. Usually you don't have to tighten them down much, just a little snug until the wheel has some drag, then loosen and put in the cotter pin.


Ive done it before on other MB cars that Ive owned. MB has a decently rigorous procedure that doses grease by mass and sets the axle nut via dial indicator.

It works.

Re: Re-packing wheel bearings by age? [Re: Trav] #4755772
05/13/18 10:35 AM
05/13/18 10:35 AM
Joined: Dec 2002
Posts: 42,625
New Jersey
JHZR2 Offline OP
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JHZR2  Offline OP
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Posts: 42,625
New Jersey
Originally Posted By: Trav
About an hour each if all goes well. While you can adjust the hub nut by feel and it works its a little Mickey Mouse. hide MB has a spec for that you check with a dial indicator. It was set that way almost 40 years ago so I guess it works.

If time permits pull it apart and check everything out like caliper seals and splash shields and take care of anything not up to snuff. I would clean and repack with new seals at this age. USE MB green 2989005110 or a 265.1 approved grease, the yellow from back then has long been discontinued AFAIK.
Before anyone chimes in with just use valvoline or this or that one, MB has a spec and a short approved list, there maybe something to it or maybe not but its always safe to use approved products.


Agree to all.

So your standard recommendation of Mobil 1 for wheel bearings doesnt apply to MBs?

I was likely going to buy the packs of MB green unless there's something notably better...

Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755805
05/13/18 11:06 AM
05/13/18 11:06 AM
Joined: Jun 2002
Posts: 12,877
The Motor City
Kestas Offline
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Kestas  Offline
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The Motor City
I don't think there's anything special about the MB wheel bearing or the MB grease. This is just a wheel bearing, like any other double taper. Use you favorite wheel bearing grease and call it good. I use Mobil Infinitec. It's superior to Mobil 1 and readily available to me. Infinitec is specially made for wheel bearings but not popular in the industry because it isn't easily pumpable at manufacturing lines.

Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755811
05/13/18 11:13 AM
05/13/18 11:13 AM
Joined: May 2014
Posts: 3,944
Columbus,Nebraska
Yah-Tah-Hey Offline
Yah-Tah-Hey  Offline

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Posts: 3,944
Columbus,Nebraska
In power generation, we followed the procedures for mounting bearings found in the manufacturer of the equipment and/or the manufacturer of the bearing.

Re: Re-packing wheel bearings by age? [Re: JHZR2] #4755841
05/13/18 11:56 AM
05/13/18 11:56 AM
Joined: Nov 2006
Posts: 21,240
MA, Mittelfranken.de
Trav Offline
Trav  Offline

Joined: Nov 2006
Posts: 21,240
MA, Mittelfranken.de
Originally Posted By: JHZR2
Originally Posted By: Trav
About an hour each if all goes well. While you can adjust the hub nut by feel and it works its a little Mickey Mouse. hide MB has a spec for that you check with a dial indicator. It was set that way almost 40 years ago so I guess it works.

If time permits pull it apart and check everything out like caliper seals and splash shields and take care of anything not up to snuff. I would clean and repack with new seals at this age. USE MB green 2989005110 or a 265.1 approved grease, the yellow from back then has long been discontinued AFAIK.
Before anyone chimes in with just use valvoline or this or that one, MB has a spec and a short approved list, there maybe something to it or maybe not but its always safe to use approved products.


Agree to all.

So your standard recommendation of Mobil 1 for wheel bearings doesnt apply to MBs?

I was likely going to buy the packs of MB green unless there's something notably better...


I realize its like any other Timken style tapered roller bearing but like many German vehicles they have a lube spec. Like engine oil specs if we are to treat them as meaningless and say oil is just oil then sure you can use anything.
If it has no spec just has GL 2 I use Mobil 1 but I rather follow the spec if it has one than not if they are available.
Not for nothing but the original went almost 40 years so...

BTW Fuchs has a approved grease in tubes but I am not sure of the number. I will see if I can find it.


ASE L1, Master. Deutsch Meisterbrief.
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