• Required reading for all forum users!!!

    Welcome!
    Register to access the full functionality of the GSResources forum. Until you register and activate your account you will not have full forum access, nor will you be able to post or reply to messages.

    A note to new registrants...
    All new forum registrations must be activated via email before you have full access to the forum.

    A Special Note about Email accounts!
    DO NOT SIGN UP USING hotmail, outlook, gmx, sbcglobal, att, bellsouth or email.com. They delete our forum signup emails.

    A note to old forum members...
    I receive numerous requests from people who can no longer log in because their accounts were deleted. As mentioned in the forum FAQ, user accounts are deleted if you haven't logged in for the past 6 months. If you can't log in, then create a new forum account. If you don't get an error message, then check your email account for an activation message. If you get a message stating that the email address is already in use, then your account still exists so follow the instructions in the forum FAQ for resetting your password.

    Have you forgotten your password or have a new email address? Then read the forum FAQ for details on how to reset it.

    Any email requests for "can't log in anymore" problems or "lost my password" problems will be deleted. Read the forum FAQ and follow the instructions there - that's what we have one for...

  • Returning Visitors

    If you are a returning visitor who never received your confirmation email, then odds are your email provider is blockinig emails from our server. The only thing that can be done to get around this is you will have to try creating another forum account using an email address from another domain.

    If you are a returning visitor to the forum and can't log in using your old forum name and password but used to be able to then chances are your account is deleted. Purges of the databases are done regularly. You will have to create a new forum account and you should be all set.

Cleaning the master cylinders and calipers

  • Thread starter Thread starter Guest
  • Start date Start date
G

Guest

Guest
I'm restoring my 81 650GL and have made it to the brakes. I bled them and I think it may be the original fluid that was in there. It was the colour of coca cola and there's a lot of rust and other grime in the reservoir and master cylinders. I've disassembled the rear master cylinder but need another snap ring tool to get at the tiny one in the front. And I haven't disassembled the calipers yet but I expect more of the same rust and grime. So what is the best cleaning solution to use? I will likely end up replacing all the rubber parts, but want to get the rest clean as new.

Thanks!
K
 
I usuallly use brake cleaner, but then wipe it all down with fresh brake fluid before re-assembly.

.
 
brake cleaner, would be a good start, then a brass wire wheel brush on a dremel for that white crusty stuff, but don't over do it and damage the piston or the claiper, use a wooden pick, or a dentis pick but be careful not to gouge the areas where the seals go....

final clean with brake fluid, and nothing else

.
 
Thanks Steve. I just happen to have a can in the garage - one less thing to buy. But I do get to buy a new snap ring plier tomorrow. New tools always makes a good day.

Cheers!
K
 
I just went through the brakes on my 750L and when i tore the calipers apart I stripped them bare and dunked them in the sonic cleaner with a 3:1 water vinegar solution. Turned the heat all the way up to 60C and ran them about an hour each, including hardware brackets etc. Rebuilt them with new seals and pistons and paint.
Final Result
2OUIDcv.jpg
 
A friendly tip. Make sure you wrap the threads of the bleeders with teflon tape. I didn't and it was the culprit of an air leak I was experiencing during bleeding. Live and learn I guess.
 
You must log in or register to reply here.
Back
Top