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 > Diesel Discussion

Reply
 
LinkBack Thread Tools Display Modes
  #16  
Old 09-09-2016, 11:27 AM
Registered User
 
Join Date: Sep 2001
Location: central Texas
Posts: 17,277
Quote:
Originally Posted by rocky raccoon View Post
The air side of the piston sees atmospheric pressure whereas the fluid side sees pressure exerted by the brake pedal. If the fluid is on both sides of the piston, brake pedal pressure cannot transfer to the wheel cylinders.
I think you are conceptualizing the theory behind vacuum power.
If the fluid is on both sides of the MC piston that is simply it being ' hydrolocked' and only with regards to initial position recovery.
The force in use here is the power first of the driver's foot.. then possibly amplified by the power booster, then the piston pushing the brake fluid.
Now, if you were thinking about the power booster... you would be closer to correct.
The brake fluid confined by the tube in the MC and pushed by the foot has no place to go except down the lines to the pistons at the brakes pushing on the brake pads....
Reply With Quote
  #17  
Old 09-10-2016, 12:02 AM
patbob's Avatar
Its a Whatsit
 
Join Date: Oct 2006
Location: Portland, OR
Posts: 836
Holy necrothread atmagc

Yeah, if its spongy after driving, but not right away, then like you did, check for a dragging caliper or something causing heat -- those symptoms are the classic boiled brake fluid ones. Brake fluid boils at a lower temp when it has lots of water in it, but if the wheel is hot, its probably dragging or a bearing is failing, causing the brake fluid to boil. The water will just make it easier for it to happen.
__________________
'83 300DTurbo http://badges.fuelly.com/images/smallsig-us/318559.png

Broadband: more lies faster.
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 06:39 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, 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