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Old 10-06-2006, 08:44 PM
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Join Date: Apr 2006
Location: up high
Posts: 79
300sdl rotor replacement

my front rotors need replacement, is it at all feasible to do by myself? how does the rotor attach to the suspension arm?

uh, that is 1987 300 sdl.

i'm sorry baby, it'll be better soon!

Last edited by rektide; 10-06-2006 at 09:14 PM. Reason: year
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Old 10-06-2006, 11:35 PM
Join Date: May 2002
Location: Blue Point, NY
Posts: 25,396
Front rotors are not at all difficult.

They are conventional in that the rotor is held to the spindle via a retaining nut and two tapered roller bearings allow rotation.

When you remove the rotor, the only difference is that you replace only the rotor and not the rotor/hub combination. Accordingly, you need to separate the rotor from the hub, which takes some muscle to break the socket head cap screws.

The inboard bearing is retained by a grease seal which needs to be replaced during this process.

The bearings should be thoroughly cleaned and repacked when the rotors are changed.

Setting the clearance in the bearings is a bit challenging. The spec is .0005", which is basically impossible to feel. You want the very slightest bit of clearance.
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Old 10-06-2006, 11:38 PM
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Join Date: Sep 2005
Posts: 598
That's one nice thing about the W124's. All you have to do to get the rotors off is take the caliper off, and take one little screw out and the rotor falls right off. Much better design than the W126's.
87 300D - Running on Veggie oil; 260,000 plus miles; Original #14 head
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