Pictorial - Rear End Rebuild Part 5 - Rear hub strip down and rebuild

More threads by WGB


New Member
Perth Western Australia
When I rebuilt the front end of my 6.9 I found that the right hand front hub had had water ingress in it so I decided I wanted to check all other bearings in case the car had sat in water.
This meant that I wanted to strip all the rear bearings (and there are five in each side of a torque control rear hub) as well as replace the actual hub bearings as a matter of course. None of them were giving trouble but the kits are not expensive and it was too good an opportunity not to complete the job properly.

Here is a picture of the LH rear hub showing the complexity of the system as used in 450 and 6.9 rear ends.


Here is a picture of the contents of one hub kit with two bearings, two seals and a new inner sealing ring, new crush ring, new locking tab for caliper, and new nut.


Here is the right rear wheel carrier cover popped and the retaining nut in view.


Here is the bare RH diagonal arm sealed against dirt ingress and ready for painting with bushes removed. Bushes will be another post when completed.


Hub with caliper carrier still in position.


Retaining ring and protective cover of caliper carrier need to be removed.


These two 10 mm hex bolts are bolted through the backing plate and into the caliper carrier and ned to be removed.


Caliper puller required quite extreme pressure to pop the bearing. I'm not sure the little 2 armed puller in the manual would work when they get old and rusty.

My 50mm socket with 1/2 inch converter in the end gives the correct distribution of pressure.


Here is the caliper carrier separated from the hub.


This is what is left and contains the hub bearing.


The manual calls for a bracket to hold the hub in a vice but I have used two old wheel studs clamped in the vice to accomplish the same thing.

Due to the torque involved - with the risk of distorting the hub - I am going to use one of my old discs to bolt up to the hub (with teh disc reversed) and that disc will have a flange welded to it to enable it to be held in a vise.


This is the approved rear hub special socket which fits the flat nut used in the rear hub.


Even with that socket on a one metre bar it took all my bodyweight and arm strength to loosen the nut after bending back the holding crimps - this is why the hub needs to be supported securely if you are to have any chance of loosening it.


At this point they manual suggests using a puller to separate the two halfs of the hub but I could not get enough purchase with any puller I had and I cannot find the one I own (and I cannot find anyone who has one for sale) that resembles the one in the workshop manual so I resorted to my small press.

A 24 mm socket sits perfectly in the end of the shaft to give the necessary pressure point security.


Here it is all cleaned up and a transmission gear puller being applied to pull off the outer bearing race.


The puller is fully applied and the race is pulled off the axle.


Only the bare axle remains.


There is only a very small lip to get purchase when driving out the bearing races left in the hub but they came out easily enough with a mallet and an old screwdriver.
The old seal is also removed.


New races were driven in with my home collected brass drift .


The outer radial seal had some sealant applied to it's insidemetal edge p and then driven on with a plastic hammer and then greased along with the races.


50 gm of high melting point grease was measured on scales and the races were packed and the remainder placed in the dead space between the races.
The inner race was tapped home and the inner radial seal was tapped home and the shaped washer pushed on and the nut turned finger tight only.

It needs to be tensioned correctly with a dial gauge once the rest of the hub is assembled and the whole assembly re-installed on the subframe.


That's for another day.



Super Moderator
Fantastic thorough posts Bill, all done with surgical precision:D:D:D
Reminds me of Art's posts on any subject on the M-100 site, coincedence? ;)
Last edited:
Similar threads
Thread starter Title Forum Replies Date
WGB Pictorial - Rear End Rebuild - Final Assembly Technical Information 0
WGB Pictorial - Rear end rebuild Part 9 - Fuel filter and hoses. Interiors 0
WGB Pictorial - Rear End Rebuild Part 8 - Handbrake de-mystified and re-built Technical Information 2
WGB Pictorial - Rear End Rebuild Part 7 - Diagonal arm bush replacement Technical Information 1
WGB Pictorial - Rear End Rebuild Part 6 - Torqueing rear hub Technical Information 0
WGB Pictorial - Rear End Rebuild Part 4 - Rusted rear discs Technical Information 4
WGB Pictorial - Rear end rebuild Part 3 - Pinion seal replacement. Technical Information 0
WGB Pictorial - Rear end rebuild Part 2 - converting diff to 126 flanged style. Technical Information 1
WGB Pictorial Rear end rebuild Part 1 - Remove Complete Assembly Technical Information 17
WGB 6.9 Rear end rebuild - Pictorial Mechanicals 4
WGB M117 Timing Chain Replacement - Pictorial Technical Information 11
WGB 6.9 Timing Chain - Pictorial Mechanicals 1
5 W126 Rear SLS Strut ball joints - availability? Mechanicals 5
OzBenzHead Rear parcel shelf Interiors 10
S A flighty Rear End Articles 9
Oversize AMG Rear Spoiler? Exteriors and Body Repairs 1
6.9forever Australian 6.9 low in rear but OK in front; also goes to High position at front Mechanicals 12
c107 S211 Rear Suspension Talking Torque 3
Styria Seized rear brake caliper Technical Information 21
Oversize W126 rear blind Gumtree/eBay/Facebook Listings 1
motec 6.9 AMG rear spoiler Gumtree/eBay/Facebook Listings 4
BenzBoy Styria's rear end? Mechanicals 3
J W126 rear seat swap Interiors 1
motec 6.9 Rear Diff mount bush Gumtree/eBay/Facebook Listings 0
motec 6.9 brabus rear muffler W123/116/126 M110 Gumtree/eBay/Facebook Listings 3
motec 6.9 W116 rear trunk filler Gumtree/eBay/Facebook Listings 11
B FS: [Melb, Au] W107 rear rubber boot spoiler Gumtree/eBay/Facebook Listings 3
Styria Rear Window Switch operation Interiors 1
Oversize Heated rear seat Mercedes W116 11
M Wanted: rear suspension blocks for 6.9 Gumtree/eBay/Facebook Listings 15
Oversize W116 Rear spring saddles Mercedes W116 1
WGB Rear 6.9 upper strut mount replacement Technical Information 0
WGB Rear sway bar chassis bush replacement Technical Information 0
WGB Rear Screen removal and replacement Interiors 2
Styria Replacing rear handbrake shoes Technical Information 13
Styria 6.9 CLACK CLACK rear hub. Mechanicals 6
CraigS WTB: W116 rear seat Squab - Blue Leather Gumtree/eBay/Facebook Listings 0
mrkozzy Rear windscreen glass removal - Any tips? Exteriors and Body Repairs 17
Styria 6.9 Front/Rear Struts Gumtree/eBay/Facebook Listings 3
Styria Rear Axle drawing Technical Information 1
WGB Advice re Torquing rear hub nut Technical Information 5
Styria Leaking Rear Struts Technical Information 34
K 6.9 Rear Bumper - Bottom One Gumtree/eBay/Facebook Listings 0
K 6.9 Entire Velour Seats For Sale Front 2 & Rear Gumtree/eBay/Facebook Listings 0
Styria New rear parcel shelf Interiors 3
Fotografa W116 Front and rear Windscreen seals $150 for the pair Gumtree/eBay/Facebook Listings 4
Styria complete 6.9 rear end on ebay Gumtree/eBay/Facebook Listings 5
Styria Unique Rear Brakes - 6.3 Mercedes W108 and W109 7
Styria Removal - 6.9 rear suspension valve Mechanicals 0
A 450SEL rear suspension upgrade Mercedes W116 7

Similar threads