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#1
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Help in replacing front rotors on 86 420 sel
Well, it looks like I need new front rotors. I think they are warped also. Are there anything I should replaced while I am "in there", such as bearings, etc.?Does any have a link to properly replace the front rotors?
Thanks, John |
#2
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Rotor's
Check the pad's and replace the wear sensor in the pads i would check the bearings aslongas they are greased the last a long time and if you haven't did it is replace the brake fluid flush the lines to each wheels
most people don't do this until they have a caliper problem
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Keeping 'em Running 1990 300SEL 1994 E320 1989 E300 ![]() |
#3
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What is the correct way to remove the hub that attaches to the rotors? It looks like I have use a bench vise to hold on to the disc. Can the bench vise damage the new disc when reattaching the hub? Need some advise on someone who has done this before.
John |
#4
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There are lots of posts from people with different methods of removing brake rotors. In theory they should just fall off with the wheel, caliper and hex retaining screw removed.
This is what I do if it is stuck: Leave the hub ON the car add some penetrating oil around the hub where the disc contacts it. Brush this junction with a wire brush to remove rust. Put 3 of the lug bolts back in the hub. 2 together and one across from it. Take a 2x4 about a foot and a half long and place it flat across the tops of the 3 wheel bolts. Use 2 c-clamps to clamp the 2x4 to the rotors like a sandwich. You are bracing the 2x4 on the center of the hub (using the bolts as a contact point) and pulling the rotor towards the 2x4. If the clamps get pretty tight and they haven't popped off just whack the rotor once with a hammer. It will "POP" off, the clamps will fall to the ground and the bolts will keep the rotor from falling completely off. This has been very effective for me! Clean the hub contact area with a wire brush and use a little anti-seize compound to make it easier next time. Good Luck!
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02 S500 92 500SL 92 400E (Sold) 87 300E (Sold) 83 300D Turbo (Sold) 75 300D (Sold) 74 240D (Sold after 20 years) |
#5
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speace's description of how to remove the rotor will not work on your car.
You need to remove the rotor and hub by removing the bearing. There are several allen style bolts holding the rotor to the hub. It takes a lot of torque to get them off. A large impact wrench is recommended to remove them. I would not hold the rotor with a vise since it might score the rotor surface.
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I got too many cars!! Insurance eats me alive. Dave 78 Corvette Stingray - 3k 82 242 Turbo Volvo - Manual - 270k 86 300e 5 speed manual - 210k 87 420sel - 240k 89 560sl - 78k 91 420sel - 205k 91 560sel - 85k 94 GMC Suburban - 90k 97 Harley Davidson Heritage Softail - 25k 00 GMC Silverado 1 ton 30k |
#6
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Screw in two lug bo;ts and but the rotor and hub combo in a vice, woodworkig type ot metalworking type, clamp the vice on the bolts and unscrew the socket head bolts that hold the rotor on the hub. Pretty easy actually. Inspect the seal while you in there and replace if necessary.
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Regards Warren Currently 1965 220Sb, 2002 FORD Crown Vic Police Interceptor Had 1965 220SEb, 1967 230S, 280SE 4.5, 300SE (W126), 420SEL ENTER > = (HP RPN) Not part of the in-crowd since 1952. |
#7
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dpetryk,
Thanks for setting him straight! I've been doing my own Mercedes brakes since 1974. It's been so long since I did one of that type that I forgot that the earlier models had those bolts on the back side of the hub. I seem to recall that I used to remove the hub/rotor assembly and bolt it back into a wheel that was laying on the driveway. It wasn't too hard to secure the whole wheel while I removed the big allen screws.
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02 S500 92 500SL 92 400E (Sold) 87 300E (Sold) 83 300D Turbo (Sold) 75 300D (Sold) 74 240D (Sold after 20 years) |
#8
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I was able to remove the hub from the rotor. Bought a cheap Harbor Freight impact wrench for $39 and a $4 10 mm hex socket. It was pretty easy after that.
Mine is the hub is sandwiched between the rotor and the wheel. I had to remove the ring of allen nuts from the rear of the rotor. John |
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