1. Getting ready to change one of my rear wheel bearings on my 87 190E. I’m going to change the 2 boots and re-grease the ball cages too while I’m in that area.

2. I got the special tools: remover made by Sir Tool, the 30 mm socket, in-hex bit for removing the old and socket for the new locking screw to do this job.

3. Got the parts: bearing kit, boot kit, extra boot and extra locking rings (for outer cage assembly).

4. I have the following questions:
. a. Before pressing the new bearing into the wheel carrier do I use any type of grease between them? If yes can I use the one that came with the boot kit? The reason I ask is the repair manual does not say to and the bearing kit did not come with any, but my instincts tells me I should because it gets hot down there and it’s metal to metal.
. b. For the ball cages I see no problem with the inner assembly as fair as cleaning, re-greasing and changing the boot. What about the outer assembly (nearest to the wheel side), was this side meant to be taken apart for cleaning, re-greasing and changing of the boot too, from the diagrams on the repair manual looks like it’s “factory sealed” unit, the only thing I can see is just changing the boot on this particular side. If repairs can be done could youall advised on how to take this side apart?
. c. What’s everyone technical answer on cleaning, re-greasing and changing of the boots should it be left alone unless it’s leaking, ripped or shows signs on rubber deteriorations (the vehicle has over 220K).
. d. On the hose/boot clamps that came in the kit I see that MB went back to the original type that was installed from the factory and not the “screw on” type as you would a radiator hose as illustrated on the repair manual. My question is do I need a special tool to clamp this? I have not gone down there to look how the originals are installed but looking at the new parts thought I get a heads up on it.
. e. What is the torque on the double hex collar nut? The reason I ask is the repair manual say 280-320 Nm. What does it mean by this pick what ever I want in between? (I’m a torque fanatic).
. f. Is the sealing compound “Loctite 574” same as Loctite 5900 and/or MB part # 002-989-73-20-10?


Sounds like a lot of nitty-gritty but I’m a enthusiast like youall are,
Thai GI sends...

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