Author Topic: Driver side rear hub hot after drive  (Read 292 times)

badali

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Driver side rear hub hot after drive
« on: May 14, 2022, 16:31:41 »
Driver side rear hub got hot after drive.  I checked the brakes for a sticking wheel cylinder.  There was not excessive brake dust when I pulled the drum.  I'm going to replace the wheel cylinders and think I should change the bearing also so I don't have to take everything apart twice.  I changed the wheel bearings on my 1961 220Sb over 30 years ago so I sort of remember how to do it along with reading the tech manual.  Are there any problems I could run into while doing this on the garage floor without a lift?  I would hate to get it apart and not be able to finish the job.
Brad

1961 220 Sb
1966 230 SL
2016 C 300 4 Matic
2019 E 450 4 Matic

badali

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Re: Driver side rear hub hot after drive
« Reply #1 on: May 17, 2022, 18:42:30 »
Will the wrench in the link work to remove the lock nut on the axle while replacing the bearings?  There are 2 different ones on the site.


https://www.authenticclassics.com/Mercedes-Rear-Axle-Bearing-Lock-Nut-Wrench-p/auth-009152.htm

https://www.authenticclassics.com/Mercedes-Rear-Axle-Bearing-Lock-Nut-Wrench-HD-p/auth-009153.htm
Brad

1961 220 Sb
1966 230 SL
2016 C 300 4 Matic
2019 E 450 4 Matic

Benz Dr.

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Re: Driver side rear hub hot after drive
« Reply #2 on: May 17, 2022, 19:17:46 »
The rear brake shoes are mechanical adjust on 230L's. Make sure you don't have them set up too tight.
1966 230SL 5 speed, LSD, header pipes, 300SE distributor, ported, polished and balanced, AKA  ''The Red Rocket ''
Dan Caron's SL Barn

dirkbalter

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Re: Driver side rear hub hot after drive
« Reply #3 on: May 17, 2022, 19:56:24 »
Will the wrench in the link work to remove the lock nut on the axle while replacing the bearings?  There are 2 different ones on the site.

Brad,
even though good to have, the nuts can be loosened / tightened fairly easy with a hammer and flattened chisel.

Dirk
66 230 SL
70 280 SEL
18 C300 COUPE
05 HD FLSTNI

Kevkeller

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Re: Driver side rear hub hot after drive
« Reply #4 on: May 17, 2022, 20:40:42 »
I made a tool you can use to remove and replace the nut if you want to borrow it. It can be used with a torque wrench and get you close to the 144 ft lbs.


1970 280 SL

badali

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Re: Driver side rear hub hot after drive
« Reply #5 on: May 17, 2022, 23:46:19 »
The rear brake shoes are mechanical adjust on 230L's. Make sure you don't have them set up too tight.

The drum rubs only slightly.  Would this cause it to heat like that?  There was minimal dust inside when I pulled the drum.  I'll check the adjustment.  The smell of the heat did not smell like locked brakes.  The hubcap was so hot I could not touch it.  I really don't want to pull the wheel bearing so I'll double check everything again.
Brad

1961 220 Sb
1966 230 SL
2016 C 300 4 Matic
2019 E 450 4 Matic

Kevkeller

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Re: Driver side rear hub hot after drive
« Reply #6 on: May 18, 2022, 00:08:01 »
Does the wheel turn freely while jacked up? How about with the drum off?
1970 280 SL

badali

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Re: Driver side rear hub hot after drive
« Reply #7 on: May 18, 2022, 00:17:42 »
Seems to turn freely.  I could not get the drum off until it cooled down.
Brad

1961 220 Sb
1966 230 SL
2016 C 300 4 Matic
2019 E 450 4 Matic

wwheeler

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Re: Driver side rear hub hot after drive
« Reply #8 on: May 18, 2022, 13:15:02 »
Seems like wheel bearings wouldn’t create that much heat. Any chance the brake hoses are collapsing causing the brakes to rub and then slowly releasing the pressure? When you drive, do the brakes feel very responsive?
Does the wheel turn freely while jacked up? How about with the drum off?
Wallace
Texas
'68 280SE W111 coupe
'60 220SE W128 coupe
'70 Plymouth Roadrunner 440+6

badali

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Re: Driver side rear hub hot after drive
« Reply #9 on: May 18, 2022, 14:18:49 »
I have changed all the brake hoses so I would hope none of them are bad already.  I have a vacation week this week so I hope to get some time to check everything thoroughly.

Brad

1961 220 Sb
1966 230 SL
2016 C 300 4 Matic
2019 E 450 4 Matic