• 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.

flush brake fluid, which bleed screw to use?

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

Guest

Guest
Brutus needs fresh brake fluid. The old stuff looks like used motor oil. I think PO was more into polishing than turning wrenches. I suppose that's why he bought a Hardley :lol:

The front is easy enough but on the rear caliper there's two bleed screws, one on each side. Would I need to use both screws (if so, which one first)? Or just use one (if so, which one)?

Debby
Brutus - 79 GS1000N
Suzy - 77 GS550B
 
Use both bleed screws. I don't think it makes much difference which one you bleed first (unlike front brake set-ups with 'antidive' units, which should be bled in a proper sequence).

What you have on the rear of your bike is a twin-piston caliper, hence the two bleed screws. Use both of them to flush fresh fluid into each piston cavity.

Mike.
 
I just did mine after changing my brake line to stainless steel braided. Yes, use both bleeders. I also kept awater spray bottle on hand to quickly wash off spilled brake fluid.
 
Just make sure you have clean fluid coming out of both screws :wink:
 
To minimise brake fluid spillage, you can use clear tubing pressed over the tip of the brake valve screw, with the other end into a glass jar or whatever, while you use an 8mm (or 10mm, depending on your bike) ring spanner to open and close the screw while pumping the brake lever, etc.

With the clear tubing, you can also clearly see when the fresh brake fluid has come through, as well as if there are any air bubbles still coming out or not.

There will still be a little mop-up of fluid needed, as a small amount will leak past the thread of the screw while it's being opened and close in the process. But you certainly don't have to put up with it dribbling everywhere, over the pads, the calipers, the disc, the floor... :wink:

Mike.
 
An additional bleeding technique that I used (on the front) was, after the usual flush and bleed procedure, to close the bleeder screw(s) and maintain pressure in the system for 12 hrs or so. I wrapped a small bungee around the brake lever and left it overnight. Wound up with a rock-hard lever and excellent response. That was 7 yrs. ago and the front brake is still firm and effective. No idea what this procedure does, except maybe percolate any remaining air out of the fluid. :wink:
 
You must log in or register to reply here.
Back
Top