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My 6.9's

Author Topic: My 6.9's  (Read 29020 times)

rumb

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Re: My 6.9's
« Reply #195 on: 25 July 2019, 11:38 AM »
Installing the stub axle is one tough job! There are 5 bearings, 4 races and 3 seals. Everything in this rear axle assy it tough to get apart and tough to get together. Make several tools and bought several pullers including a 10 ton hydraulic one to get the big bearing out. The crush washer is very tough, a 5' breaker bar did nothing so I used the big impact wrench to slowly tighten with checking end play about 15 times.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

rumb

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Re: My 6.9's
« Reply #196 on: 26 July 2019, 11:19 AM »
Installed new link with home made alignment jig I made before I took the old ones off. There is one for each side to get the angle correct when you press the big pin in.

Fill cavity with grease and tighten nut to correct torque, install grease cap. 
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

G Johnson

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Re: My 6.9's
« Reply #197 on: 15 August 2019, 11:30 AM »
Rumb
This is a very helpful post, I need to do this to my C126 can I ask how you removed the gold colour shackle/link
from the trailing arm?
The alignment jig and pulling it in with threaded bar and washers is clear I just wonder how best to remove it
Thank you for any help and tips
Graeme Johnson

rumb

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Re: My 6.9's
« Reply #198 on: 15 August 2019, 02:13 PM »
I used a small 2 jaw puller. the hook part has to be small to fit in behind the link.  I put a C clamp on to keep it from slipping off.

I think it was this one - check the sizes offered.
https://www.amazon.com/gp/product/B071DF2ZB4/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

There are two alignment guides, one for each side. Make them before you pull the links off or you wont know how to install them. Use fine thread all-thread. I used coarse thread and completely pulled the threads off it. It take a lot of pressure to get them back on.

If you are replacing all the bearing, be warned that they are all stuborn. This rear axle assembly has been the hardest thing to do in 50 years of wrenching. PM me if you want any additional information. As mentioned I had several press tools made and had to purchase a 10 ton hydraulic puller to get some of it apart. I would rent them to you if needed.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

G Johnson

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Re: My 6.9's
« Reply #199 on: 18 August 2019, 03:34 AM »
Rumb
Thank you for the reply that makes sense
I would love to do mine properly and brake it down into individual parts
to blast and powder coat like you have but I know I would not be able
to re assemble the rear hub and bearing carrier.
I am just going to remove the trailing arm and paint strip wire brush and
sand with the parts assembled then paint with por 15
Thanks again Graeme Johnson (UK)

oversize

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Re: My 6.9's
« Reply #200 on: 13 September 2019, 02:53 AM »
WOW love your work!!
1979 6.9 #5541 (Red Bull)
1978 6.9 #4248 (Skye)
1979 6.9 #3686 (Moby Dick)
1978 6.9 #1776 (Dora)
1977 450SEL #7010 white -P
1975 450SEL #8414 gold -P

rumb

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Re: My 6.9's
« Reply #201 on: 16 September 2019, 01:45 PM »
Spent the last week refinishing 4 Bundt wheels. Started with bead blasting them last week.  Applied primer and a few days later (today) sprayed the silver and clear coats. I spent 10-12 hours total time.  I suspended the wheels from a rope tied around the middle so I could get to both sides and hung them from my parts tree.  With all the holes and sides of the ribs it was quite a chore to apply the base and clear coats evenly on all surfaces.
« Last Edit: 17 September 2019, 03:17 PM by rumb »
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

rumb

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Re: My 6.9's
« Reply #202 on: 15 November 2019, 02:11 PM »
Had a great day today welding in the left rocker panel. Lots of rosette welds and the grinding with 2" 60 grit went pretty fast.  Glad that job is done.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

rumb

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Re: My 6.9's
« Reply #203 on: 15 November 2019, 02:12 PM »
Next week tackle the wheel arch!
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

rumb

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Re: My 6.9's
« Reply #204 on: 15 November 2019, 02:18 PM »
I finally found a supplier for LSD clutch disks.  They are completely NLA from MB. Next week I will take the diff apart and verify sizes and hopefully get them ordered. I will make a separate thread when I get them to show how to do it.

I also got around to taking a rear strut apart. Not really too difficult, you need to heat the ends with a torch to about 200 degrees. That is still low enough that it doesn't burn the paint.  Currently working on sourcing parts to rebuild.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

rumb

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Re: My 6.9's
« Reply #205 on: 24 January 2020, 11:32 AM »
Funny how next week turned into 2 months later...

This week I repaired rust patch at rear of rear arch and welded in the inner fender repair panel.

'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

daantjie

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Re: My 6.9's
« Reply #206 on: 24 January 2020, 01:46 PM »
Nice work!  Bodywork is where I hand it to the pro's, I really lack the skill and patience to not make a hash of it ::)  But then again, you can drop big coin on a shop and still get really crappy bodywork, so the challenge is to find a really good shop locally.  Good luck with that here in Vancouver...
Daniel
1977 450 SEL 6.9 - Astralsilber

rumb

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Re: My 6.9's
« Reply #207 on: 12 February 2020, 06:19 PM »
I've been plugging away on the rear wheel arch. Have completed removal of all mangled or rusted sections and replaced with new metal. All the inner work is done, next start fitting the outside panel.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550

Eyeman

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Re: My 6.9's
« Reply #208 on: 14 February 2020, 09:19 AM »
Great work Rumb.  I spend more time working on an old boat than cars, but about to get to some car stuff soon.  Have you tried Bulldog paint adhesion promoter?  I use it when I can't powder coat something.  For sure it helps in my mind.

rumb

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Re: My 6.9's
« Reply #209 on: 17 March 2020, 12:38 PM »
This is actually from 2 weeks ago. I nearly finished the panel patching on the left side of the car. Importunately I just had back surgery and will be INOP for 3-4 weeks.  Trying to find very light tasks to do in the meantime.
'68 250S, '77 6.9 euro, '91 300SE, '98 SL500 '14 CLS550