Removing brake disk 300D. Real -vs-Manuel - PeachParts Mercedes-Benz Forum

coachgeo · #1 03-23-2004, 07:09 PM

OK. Manuel is calling for a hub remover, Also it calls for new bolts to attach hub to new disk.

Do you really need a hub remover?

Do you really need new bolts?

(I dont have a hub remover and there is no local dealer to get bolts from (2 hour drive to get them) I have new disk and pads from Fastlane.

#2 03-23-2004, 07:36 PM

Are we talking about front or rear?

coachgeo · #3 03-23-2004, 07:45 PM

I am removing and replacing both. Just read manuel on front again. Have not reviewed rear again yet so I dont remember if it is basically the same

Wasuchi · #4 03-23-2004, 07:54 PM

When I did my fronts I just put them in a vice so I could get the bolts loose. I used the same bolts when I put them back together.... I put threadlock on all the bolts too.

coachgeo · #5 03-23-2004, 08:34 PM

Quote:

Originally posted by Wasuchi
When I did my fronts I just put them in a vice so I could get the bolts loose. I used the same bolts when I put them back together.... I put threadlock on all the bolts too.

how did you get it off the car. Does it just slide off after removing the calapers?

What thread lock do ya'll reccomend. The med. grade?

Wasuchi · #6 03-23-2004, 09:06 PM

Yep, should come right off after the caliper is off and you remove the nut on the spindle (don't know the technical term for it). The bearings will fall out if you aren't careful at least the outside ones will, I think there is a seal that holds the larger inside ones in. Sorry, can't tell you about the back.

I can't remember which threadlock I used but it was mainly just to keep the bolts from ever coming loose from vibration and so the bolts won't seize up.

coachgeo · #7 03-23-2004, 09:20 PM

Quote:

Originally posted by Wasuchi
Yep, should come right off after the caliper is off and you remove the nut on the spindle (don't know the technical term for it). The bearings will fall out......

Yowza..... glad you said something. This is nothing like what the manuel I have says. It says nothing about removing a spindle nut. It just says "remove the hub" with no detail on how to do that. The detail before that was about removing the caliper. This manuel is a PDF file I found.

coachgeo · #8 03-23-2004, 09:27 PM

Quote:

Originally posted by coachgeo
Yowza..... glad you said something. This is nothing like what the manuel I have says. It says nothing about removing a spindle nut. It just says "remove the hub" with no detail on how to do that. The detail before that was about removing the caliper. This manuel is a PDF file I found.

here is the link to the manual pages for front brake disk removal. Table of contents say this manuel is for a 300D

http://skinnerbox.steaky.org/123_DISK2/program/Chassis/42-220.pdf

#9 03-24-2004, 09:27 AM

Don't remove the hub from the car. Remove the rotor from the hub. There is an allen bolt, maybe two that hold the rotor in place so it won't fall off while you are bolting on the wheel. Remove the allen and slip off the rotor. Make sure you clean the hub surface thoroughly with a steel brush before putting on the new rotor.

On the rear, you will have to loosen the emergency brake shoes before removing that rotor in a similar manner. To loosen the shoes, there is a star wheel like good ol' fashioned drum brakes. You access the star through a lug bolt hole. The star is at the top, slightly forward. On the left side this would be at a bout 11 o'clock and on the right side this is at about 1 o'clock.

Good luck,

Wasuchi · #10 03-24-2004, 09:40 AM

Larry,

Aren't the allen bolts on the inside of the hub? (can't reach them withought removing the hub) That's the way I remember it.... I thought there were 5 of them.

coachgeo · #11 03-24-2004, 09:58 AM

Quote:

Originally posted by Wasuchi
Larry,

Aren't the allen bolts on the inside of the hub? (can't reach them withought removing the hub) That's the way I remember it.... I thought there were 5 of them.

The manuel above shows that they are on in inside also. Larry are you saying remove the backing plate to do this or is there an access hole in the plate orr??

coachgeo · #12 03-24-2004, 12:09 PM

outside working on this thing now. Have a bolt stuck (caliper bolt). while I fight with that hopefully someone will answer about removing disk with hub on car or fill me in more on how to remove hub.

TimFreeh · #13 03-24-2004, 12:46 PM

Larry's instructions are for a W124 and later car. On those cars you can remove the brake rotor without disturbing the wheel bearings. It's been awhile since I've done this on a W123 but as I recall you do have to remove the hub - the rotor bolts to the hub with 5 8mm allen bolts. To remove the hub you must remove the wheel bearings.

The allen bolts that hold the rotor to the hub can be very tight. Make sure that you have a good 8mm allen when you try to remove them, If you strip the heads there is not much room in the hub to mess around.

I've never replaced any of the 8mm bolts - I dont think they are stretch bolts.

Wasuchi · #14 03-24-2004, 12:47 PM

Are you going to rebuild the calipers while you have them off? Just curious.

I would go ahead and remove the hub, even if you don't have to. That gives you the opportunity to repack the bearings and take a good look at them for wear.

on edit:
I was wondering if Larry was thinking of a later car or if I had done things the hard way.

coachgeo · #15 03-24-2004, 12:52 PM

drattt.... ok...... manuel tells me nothing about removing the hub. How do I get to the spindle nut?