Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help




Go Back   PeachParts Mercedes-Benz Forum > Mercedes-Benz Tech Information and Support > Mercedes-Benz SL Discussion Forum

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 07-24-2007, 10:21 PM
Registered User
 
Join Date: Nov 2006
Location: Minneapolis
Posts: 51
1991 R129, brake job, need help

So, I tore into my front brakes tonight, using the Mercedes WIS as my guide. (I have done very little work on disc brakes before)
I have purchased new EBC ceramic pads to replace the old worn ones (indicator light was on), as well as new wear sensors.
I have used a punch to get get both pins out, but the WIS is listing a tool that looks like it will slide between the old pad and the pistons, to separate the two, and remove the old pad. Is there another way to do this with out this tool?
Probably a simple question with a simple answer, so thanks in advance for any help!!

Matt
Reply With Quote
  #2  
Old 07-24-2007, 10:27 PM
dpetryk's Avatar
Electrons can do anything
 
Join Date: Sep 2001
Location: Houston, Texas
Posts: 1,071
I use a small crowbar or a prybar to open the piston.
__________________
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
Reply With Quote
  #3  
Old 07-24-2007, 10:56 PM
waybomb's Avatar
Registered User
 
Join Date: Nov 2002
Location: St. Joe, MI; Manitowoc, WI
Posts: 1,553
I usually pull the caliper off the spindle. With the caliper off, I can clean all the crud built up around the pads, and remove any rust that could keep the pads from moving.

But if you don't want to do that, simply place a screwdriver blade between the rotor and the pad, and compress the piston all the way. Pull/pry that pad out, replace with new. Then do the other half. Do the same on the other side. Before you drive the car, you should depress the brake pedal a few times to move the pads toward the rotor, so you have proper braking action.
__________________
Thank You!
Fred
2001 E430 Sport, 204,000 miles
1997 C280 Sport, 144,000 miles
1991 300SL, 189,000 miles
1987 420SEL, 149,000 miles
1986 190e 2.3 16v, 151,000
1968 W30 442, 78,000 miles
1988 46' US1 Cougar, 3 supercharged 572's
http://s4.photobucket.com/albums/y145/waybomb/
Warming the globe, 24 cylinders at a time
And I want a 126 wagon! Point me to one!
Reply With Quote
  #4  
Old 07-25-2007, 11:58 AM
Mike Miller's Avatar
Registered User
 
Join Date: Sep 2005
Location: Huntington Beach, CA
Posts: 276
Quote:
Originally Posted by Doctor2687 View Post
So, I tore into my front brakes tonight, using the Mercedes WIS as my guide. (I have done very little work on disc brakes before)
I have purchased new EBC ceramic pads to replace the old worn ones (indicator light was on), as well as new wear sensors.
I have used a punch to get get both pins out, but the WIS is listing a tool that looks like it will slide between the old pad and the pistons, to separate the two, and remove the old pad. Is there another way to do this with out this tool?
Probably a simple question with a simple answer, so thanks in advance for any help!!

Matt
The tool is a fancy way of depressing the pistons so you can get the pads out. It goes between the pad and the rotor, not pad and piston. You can use anything flat that will fit in there and push the piston (and pad) back. Be carefull not to score the rotor. The pads should come out with a little yank.
__________________
roadkingmike@aol.com
Coast Aero Support Services, LLC
'92 MB 500 SL
'01 BMW 525i Sport
'98 Harley Davidson RoadKing
'74 BMW 3.0 CSi - Gone to a good home
Reply With Quote
  #5  
Old 07-28-2007, 02:34 PM
Registered User
 
Join Date: Nov 2006
Location: Minneapolis
Posts: 51
Need more help

Ok board brothers, here is the latest:

I got the passenger side apart, using c clamps to open the piston, which then stayed open (this is how it is supposed to work correct?
I got the one new pad in with just a few taps of a rubber hammer. It did sheer just a very small part of the face of the pad off.
Now I cannot get the second pad in. It goes in part way, but then will not go further, I assume I should not force this with a hammer, etc. I believe the piston is still open all the way, but I am stuck.
Any ideas?

Thanks

Matt
__________________
1991 Mercedes 500SL
2001 Jaguar XJR
1967 Mustang
Reply With Quote
  #6  
Old 07-28-2007, 09:43 PM
Registered User
 
Join Date: Mar 2003
Location: Milwaukee Wisconsin
Posts: 1,150
When I did mine (1991 300SL ) I had no problem pushing the pistons in with a very large flat blade screw driver. There was ample clearance to install the new pads. As I recall, the piston can be moved in almost flush with the caliper surface. I would not suggest that you force the new pad in. Have you cleaned off all the surface rust? I wonder if the pads you have are thicker than originals? Did the old pads have shims? Do the new pads have shims? Don't forget the anti squeel paste.
__________________
Resistance is Futile.
Reply With Quote
  #7  
Old 07-30-2007, 02:02 PM
Registered User
 
Join Date: Nov 2006
Location: Minneapolis
Posts: 51
Thank You!!

Thanks guys, I have successfully installed my new pads. I would have still had them apart without all of your help!!

Matt
__________________
1991 Mercedes 500SL
2001 Jaguar XJR
1967 Mustang
Reply With Quote
  #8  
Old 08-06-2007, 11:46 PM
elau's Avatar
Registered User
 
Join Date: Nov 1999
Location: MD.
Posts: 1,725
You don't know how jealous I am right now. I just had my front brake job done by an Indie, both rotor and pad for $419 including tax. You probably saved yourself $275 at the minimum.
__________________
95 R129
04 Infiniti G35.5 BS
10 X204
Reply With Quote
  #9  
Old 09-16-2007, 02:18 AM
lynns's Avatar
Registered User
 
Join Date: Mar 2004
Location: So. California
Posts: 295
Quote:
Originally Posted by Doctor2687 View Post
Thanks guys, I have successfully installed my new pads. I would have still had them apart without all of your help!!

Matt
How many miles are now on your new EBC pads?
Are they the EBC Red?
How is the brake dust?
How often do you clean your wheels now vs. OE pads?
__________________
Mit freundlichen Grüßen, Lynn

2000 SL500 Silver
2000 SL500 SOLD
1989 560SL SOLD
1988 560SL SOLD
Reply With Quote
  #10  
Old 09-16-2007, 02:10 PM
Registered User
 
Join Date: Nov 2006
Location: Minneapolis
Posts: 51
EBC Reds

Hi Lynn, you are everywhere!! LOL
I have about 600 miles on the pads now.
At first they were putting out way more dust than OEM, and I was not happy.
I realized that this was due to the "Break-in" compound on the pads.
Now they are still kicking dust out, but it gets less every day and is less than OEM.
Manufac. says it can take 1000 miles to fully break-in the pads.
I assume that in a few hundred more miles I will have little to no dust.
Now I am driving the car every day as I want to get time in before the snow flies.
I am cleaning the wheels about every 2 weeks.
(at first I was cleaning them every 2-3 days)

Matt
__________________
1991 Mercedes 500SL
2001 Jaguar XJR
1967 Mustang
Reply With Quote
  #11  
Old 09-17-2007, 12:53 AM
Registered User
 
Join Date: Jan 2004
Location: Modesto, CA
Posts: 21
As a seasoned mercedes brake installer (300cd, 85 turbo diesel, 300sl, and 30 years of porsches, I can offer the following tips. I always replace the wear indicators, use white grease on the back of the shoes and the edges (sparingly). I drive the pins with a large nail with the point filed off. I compress the pads with paint stir sticks or cresent wrench handles. Be sure you have removed the master cylinder cap off or you will have a difficult time. always look for fluid leaking on calipers and scratches on the disk. I never resurface disks. They are reasonable to replace as opposed to having a thin disk which would not take as much heat before it warped. You have saved a lot of money doing it your self..buy the best brake pads you can. I have taken to wearing rubber gloves when working on brakes over the last few years. Good luck!!!
Tom Swafford
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -4. The time now is 04:55 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page