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  #1  
Old 01-03-2010, 02:43 PM
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Slave/Master cylinder replacement

1980 240D (123)

I need to replace the slave cylinder and while I'm at it the master cylinder as well.

What is the best way to relieve the pressure so I can replace the cylinders?
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  #2  
Old 01-03-2010, 04:06 PM
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I'd remove and plug the delivery line from the brake master cylinder reservoir to stop fluid from running into the clutch master cylinder and then remove the line at the slave cylinder and pump the clutch to empty the system as much as possible.
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  #3  
Old 01-03-2010, 04:27 PM
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Answer

Quote:
Originally Posted by sonofword View Post
1980 240D (123)

I need to replace the slave cylinder and while I'm at it the master cylinder as well.

What is the best way to relieve the pressure so I can replace the cylinders?
What pressure?
There is none, unless you are stepping on the pedal.
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Old 01-03-2010, 05:11 PM
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Thank for the clarification on the pressure. I'm a total newbie with this car. (Although I'm finding this car isn't as complicated as it seems)

My other concern is that the slave cylinder leaked brake fluid around the transition. Should I be worried about any corrosion and if so how do I clean it up to avoid any problems? The inside of this car is suspiciously clean. Not even a drop of oil anywhere. I would hate to see something like a little bit of brake fluid cause serious problems in the future.

Also, if I'm going to be draining some brake fluid out would it be wise to just replace all of the fluid? If so what is the best way to do it?
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  #5  
Old 01-03-2010, 05:22 PM
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Answer

Quote:
Originally Posted by sonofword View Post
Thank for the clarification on the pressure. I'm a total newbie with this car. (Although I'm finding this car isn't as complicated as it seems)

My other concern is that the slave cylinder leaked brake fluid around the transition. Should I be worried about any corrosion and if so how do I clean it up to avoid any problems? The inside of this car is suspiciously clean. Not even a drop of oil anywhere. I would hate to see something like a little bit of brake fluid cause serious problems in the future.

Also, if I'm going to be draining some brake fluid out would it be wise to just replace all of the fluid? If so what is the best way to do it?
Some Facts About Brake Hoses:
#1. The average life of a brake hose is six years.
#2. Brake hoses deteriorate from the inside as well as the outside.
#3. Moisture is absorbed into brake fluid systems through brake hoses.
#4. Contaminants in brake fluid act abrasively on the inner wall of brake hoses.
#5. The brake hose reinforcing fabric deteriorates through expansion and moisture.
#6. High operating temperatures contribute to the deterioration of hoses.
#7. Brake hoses swell with age and restrict flow.
#8. Generally all brake hoses on a vehicle deteriorate at the same rate, So all hoses should be replaced if one is found to be faulty!

------------------------------------------------------------------

Brake is a safety system = issues can kill you or others!!!

Be aware of your LEGAL LIABILITY.

http://www.matveylaw.com/CM/Custom/Car-Accident-Causes.asp
http://www.expertlaw.com/library/car-accidents/
http://www.nolo.com/article.cfm/ObjectID/0F1CEF63-DD72-4E9C-A9EFEF37DFC3C5ED/catID/C2B5FF79-6DD8-4FD5-85351429C56DCFFD/104/199/255/ART/
http://www.thebarberlawfirm.com/dallas-car-collisions-lawyer-texas.html
http://www.goldsteinhayes.com/PracticeAreas/Automobile-Accidents.asp

--------------------------------------------------------------

TYPICAL 'RUBBER' BRAKE HOSE FAILURES
http://www.maltech.com.au/brakehoses.html
http://www.familycar.com/brakes.htm

Incredible data, a must read.
Brakes FAQ Home Volvo Maintenance FAQ for 7xx/9xx/90 Cars
http://www.volvoclub.org.uk/faq/Brakes.html

The Brake Bible
http://www.carbibles.com/brake_bible.html

Bendix Instructional Videos
http://www.bendixbrakes.com/techCorner/

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Brakes caught fire 1999 C280

Tell my dad my tire is on fire!
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gruesome 617 engine pics - don't look if you have a weak stomach
Brake FAIL: gruesome 617 engine pics - don't look if you have a weak stomach

Industry Adopts Brake Fluid Replacement Guidelines By Bill Williams, Technical Contributor
http://www.babcox.com/editorial/bf/bf50412.htm

Brake flush every two years?! U'r kidding right?
Brake flush every two years?! U'r kidding right?

Why should I flush my brake fluid every year, you ask?
http://www.peachparts.com/shopforum/diesel-discussion/38856-why-should-i-flush-my-brake-fluid-every-year-you-ask.html#post220599

Brake bleeder recommendation
http://www.peachparts.com/shopforum/tech-help/72839-brake-bleeder-recommendation.html#post455818

Power Bleeder or what?
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Brake bleeder - power bleeder Homemade
Brake bleeder - power bleeder Homemade

brake problems- I really, really, dislike brake work!
http://www.peachparts.com/shopforum/diesel-discussion/33381-brake-problems-i-really-really-dislike-brake-work.html#post184248

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http://www.peachparts.com/shopforum/diesel-discussion/141573-frau-frankenbenz-not-stopping-dime-post1059782.html

Eaten alive! My brakes that is...
http://www.peachparts.com/shopforum/showthread.php?p=666235

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http://www.peachparts.com/shopforum/diesel-discussion/39948-how-long-do-your-brake-pads-last.html#post227992

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http://www.peachparts.com/shopforum/diesel-discussion/135096-weak-brakes-but-good-pedal-feel.html#post993172

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http://www.peachparts.com/shopforum/diesel-discussion/112993-defective-new-master-cylinder-long.html#post798232

HOW do you attach the Resevoir to the Master Cylinder??
http://www.peachparts.com/shopforum/diesel-discussion/142292-how-do-you-attach-resevoir-master-cylinder.html#post1066676

W126 master cylinder and reservoir
http://www.peachparts.com/shopforum/diesel-discussion/116363-w126-master-cylinder-reservoir.html#post826695

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Brake system bleeding, master cylinder bleeding
http://www.peachparts.com/shopforum/general-information/149045-brake-system-bleeding-master-cylinder-bleeding-damage-warning.html#post1127978
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