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-   -   How to guide to replace front Brake Pads and Rotors on a W123 (http://www.peachparts.com/shopforum/diesel-discussion/236897-how-guide-replace-front-brake-pads-rotors-w123.html)

vstech 04-09-2013 01:10 PM

Quote:

Originally Posted by Orv (Post 3127754)
Now my question is, does anyone have any slick tricks for getting the old bearing races out? I've been hammering like crazy on those buggers and they won't budge. Maybe I can groove them with a cutting wheel and hit them with a cold chisel, to try to fracture them?

if you have a welder, you can run a bead along the inside of the race, then bang the hub on the floor, and the race will fall out.

Orv 04-09-2013 07:27 PM

Quote:

Originally Posted by Brian Carlton (Post 3127857)
\But, most folks do not know whether the race has been knocked out of squareness because it's very difficult to see the size of the gap that develops.

The best procedure is to tap lightly all around the face of the race with a drift and continue this process as it starts to move. Remember, harder hits are not your friend in this situation. Patience is a virtue.

Aha. Thanks, I'll try that. I started out trying to finesse it, then got more aggressive when I didn't see any movement -- but it sounds like I needed to just keep finessing it until it popped out.

Quote:

Originally Posted by vstech
if you have a welder, you can run a bead along the inside of the race, then bang the hub on the floor, and the race will fall out.

That's extremely clever, but unfortunately I don't have one.

For reinstallation, I'm thinking it may help to put the new races in the freezer to shrink them.

Brian Carlton 04-09-2013 08:37 PM

Quote:

Originally Posted by Orv (Post 3128244)
For reinstallation, I'm thinking it may help to put the new races in the freezer to shrink them.

You'll only get .0008" out of that. It helps a bit, but the race will be warming the entire time it touches the hub.

Dry ice will start you off with .002" shrink and you'll be amazed at how easy the task becomes. I pay $1.50/lb. for it........well worth the cost.

Orv 04-10-2013 01:58 AM

Quote:

Originally Posted by Brian Carlton (Post 3128270)
You'll only get .0008" out of that. It helps a bit, but the race will be warming the entire time it touches the hub.

Dry ice will start you off with .002" shrink and you'll be amazed at how easy the task becomes. I pay $1.50/lb. for it........well worth the cost.

Excellent idea, thanks. The local supermarket carries the stuff.


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