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 > Tech Help

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-11-2012, 06:17 PM
89 Mercedes 300e,190 000k
 
Join Date: Dec 2008
Location: windsor, ontario, canada
Posts: 74
Bleeding w124 abs unit PLEASE help!! Thanks ahead of time

Hey guys, looking for some help here. I have a 1989 Mercedes 300E (W124). The car has been sitting on the side of my house for almost two years. I replaced a brake line awhile back and ran into problem after problem. Anyways... here's the dilemma. I took out the master cylinder and replaced a line that went from the master cylinder to the ABS unit. I paid a guy to torch 3 of the bleeder valves because i learned the hard way and sheered one of them off. The car is all back together and sitting on blocks. I'm having trouble bleeding the system. For one thing when I start the car the idle sky rockets and won't level down (Vacuum leak? Yeah but where and why? It didn't do it before i attempted to bleed the system). Now the main problem is I don't have any brake fluid at any of the calipers!! I pumped the brakes and even used a manual vacuum pump but still nothing. The master cylinder reservoir won't go down. So I'm convinced that there are several or a large air pocket in the ABS unit. I don't know what to do, and it's tough finding the answers online. Right now I cracked all the bleeder valves and opened the lid to the MC and doing a "Gravity bleed". Read it online..... But yet the MC level still hasn't changed. Any input would greatly be appreciated. Thanks

Reply With Quote
  #2  
Old 05-11-2012, 08:36 PM
silversleeves's Avatar
Registered Snoozer
 
Join Date: Jun 2007
Location: Vancouver, BC
Posts: 139
Can you pressure bleed it? As i am sure you know gravity sucks.
Reply With Quote
  #3  
Old 05-11-2012, 09:42 PM
89 Mercedes 300e,190 000k
 
Join Date: Dec 2008
Location: windsor, ontario, canada
Posts: 74
Well I tried using a manual vacuum pressure bleeder but had no luck..... I have some news; however, I went outsidew after about an hour....and started to pump the brake pedal and I can see the reservoir going down. Looked around tthe car and it was the front passenger side leaking out a lot.....the rear still have nothing....Should I just keep waiting?
Reply With Quote
  #4  
Old 05-11-2012, 10:10 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,418
Did you bleed the master cylinder by itself? You got to do that first.
__________________
Jim
Reply With Quote
  #5  
Old 05-11-2012, 11:07 PM
89 Mercedes 300e,190 000k
 
Join Date: Dec 2008
Location: windsor, ontario, canada
Posts: 74
Yup... I blead the MC . That was the first thing I did....Can the ABS unit by Bosch be blead? I see a little torx screw in the back at the bottom ...Also the driver caliper is the one where I broke the bleeder valve so I'm going to bleed it through the hose....why isn't any fluid getting to the rear? Is my assumption about an air pocket in the ABS plausible?
Reply With Quote
  #6  
Old 05-11-2012, 11:08 PM
engatwork's Avatar
busy
 
Join Date: May 2000
Location: Soperton, Ga. USA
Posts: 12,418
Once the m/c is bled it should be just like any other bleed job.
__________________
Jim
Reply With Quote
  #7  
Old 05-11-2012, 11:23 PM
89 Mercedes 300e,190 000k
 
Join Date: Dec 2008
Location: windsor, ontario, canada
Posts: 74
Hmm.... You know maybe I didn't bleed the MC right....what I did was I unscrewed the screw at the bottom right of the MC, stuck a nipple and clear vacuum hose to one end and the other inside the MC....Filled with fluid and pumped the pedal....I watched the air bubbles go through the hose and it was clear fluid after.....Was I suppose to plug the 2 holes where the lines come out of?

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 02:22 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