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#1
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Drive shaft mount replacement - difficult?
I need to replace one of the drive shaft support/mount/bearing on my 69 w115. It's the center one of the 3 if I recall. I have the new support/mount, have to order the bearing. I have a book that describes the process of replacement. Can someone tell me just how challenging it can be?
Chris
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1969 Model 220 gasoline Chassis: W115.010 |
#2
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Not if you don't mind getting your car up and off the ground where you can work under it in safety. Looks like a drop them down and the shaft will slip out of the spline section, replace the bearing and holder and put it back up. It is always a good idea to mark the shafts very clearly, so that the line up is the same when it is put back together. Probably can be done with just one socket also.
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Junqueyardjim Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis 1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA 2003 Jaguar Type X, AWD. beautiful, good mileage, Mom's car, but I won't let her drive it! |
#3
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This is a rather easy, but time consuming, task.
Of course you will have to put the car up as high as you can get it, and you might have to drop out the exhaust system, but the real important thing is to mark the driveshafts so they can be lined up in the original positions. The entire three piece drive shaft is balanced as a unit from the factory, and it is almost impossible to find anyone with the equipment to balance a three piece shaft today. Also.... Watch out for the little weights on the shaft. These are square pieces of metal that were tap welded on. If they fall off then put them back on with super glue. They will fall off if you drop the shaft while you are removing it. The coupling of the shafts is also held together by some large nuts on the shaft. I have used a large pipe wrench to break these loose. You will see what I am talking about when you get in there. |
#4
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Do the bearings need to be pressed in/presssed out by a machine shop?
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1969 Model 220 gasoline Chassis: W115.010 |
#5
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No they will just slide right on, with a nice fit.
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Junqueyardjim Christianity, if false, is of no importance, and if true, of infinite importance. The only thing it cannot be is moderately important. C.S. Lewis 1983 Mercedes W123 240D 4 Speed 285,000 on the road with a 617 turbo, beautiful butter yellow, license plate # 83 240D INDIANA 2003 Jaguar Type X, AWD. beautiful, good mileage, Mom's car, but I won't let her drive it! |
#6
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What holds the bearing in the rubber mount/support, just a snug fit?
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1969 Model 220 gasoline Chassis: W115.010 |
#7
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Sort of. The entire driveshaft will come apart in sections, but when it is all assembled, as it is when it is installed in the car, everything fits in there pretty tight.
There is a big nut that must be removed from the end of each section of the shaft so the shaft can be slipped out of the bearing, but really the answer to your question is.... Yeah, they just sort of fit in there. The theory behind the carrier bearing is the bearing starts to go and then it starts to tear at the carrier, sometime called the spider, until the carrier is torn up and you hear the rumbling. The bottom line is that this prevents the bearing from getting so hot that it melts to your drive shaft. So it makes a terrible noise and will eventually beat a hole through your floor, but replacing the bearing on the shaft is normally pretty easy. |
#8
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ThankS! I am wondering if only 1 of the 3 has gone bad, should I replace the other two bearings on the other to carriers/spiders . . . ?
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1969 Model 220 gasoline Chassis: W115.010 |
#9
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Answer
Quote:
You really don't want to pull the drive shaft repeatedly for the same job. These links should help you. W126_Rubber Boot_drive shaft center support bearing W126 drive shaft carrier/center bearing DIY PeachPartsWiki: Driveshaft Support (carrier) Bearing Replacement .
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#10
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really this is done best on a lift , you need room to move around, lower things and an extra set of hands helps too....
Good luck
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Ron 2015 Porsche Cayman - Elizabeth 2011 Porsche Cayman - Bond,James Bond Sadly MERCEDESLESS - ALways LOOKING ! 99 E320 THE Queen Mary - SOLD 62 220b - Dolly - Finally my Finny! Sadly SOLD 72 450SL, Pearl-SOLD 16 F350 6.7 Diesel -THOR 19 BMW X5 - Heaven on Wheels 14 38HP John Deere 3038E Tractor -Mean Green 84 300SD, Benjamin -SOLD 71 220 - W115-Libby ( my first love) -SOLD 73 280 - W114 "Organspende" Rest in Peace 81 380 SL - Rest in Peace |
#11
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If you deceide you want your u-joints replaced while the shaft is out "Driveline Service of Portland" can rebuild your shaft with servicable u-joints. I had them rebuild my 3 piece shaft. They specialize in German vehicles.
Driveline Service - Mercedes Driveshafts
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Tony H W111 280SE 3.5 Coupe Manual transmission Past cars: Porsche 914 2.0 '64 Jaguar XKE Roadster '57 Oval Window VW '71 Toyota Hilux Pickup Truck-Dad bought new '73 Toyota Celica GT |
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