• 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.

Dogma's Caliper Piston PSA

Dogma

Dogma

Forum Sage
When using compressed air to remove the piston from a brake caliper, not only should you keep your fingers out of the caliper, you should make sure the piston is not aimed at a storm drain.
 
retrieve

retrieve

I had to reach behind a freezer with a magnet for one of mine:D
 
Is this what ebay is for, to get replacement calipers for old bikes.
 
I got one out the other day using compressed air at the local garage. It shot into the air, smacked off their ceiling (while everybody was covering their heads) and then bounced off under a lathe out of the way.
How we laughed.

I won't be going there again, they all point and laugh now :)

I need to get my own compressor, since piston firing could be an olympic sport in a few years, got to get some more practice in.
 
I just did two calipers yesterday...no problem...

Just wrapped a shop rag around it first...pop...caught in the rag....:p
 
Nessism said:
So you take off one set of old calipers and install another equally old set?:confused:
Click to expand...
Yup, but for those keeping bikes stock it is a supply for replacing hiding parts such as the ones that go scurrying behind lathes or cannon fire into storm drains.
 
questions...

Why was I doing this in the street? Because that's where I park my car. (Wifes' in the driveway, the GS in the garage.) My only compressor is a little portable job that I keep in the car, and it runs off the lighter.

Replacing old caliper with another old caliper? The parts bike had two calipers, one had a good piston. All four caliper bodies were nasty and in need of cleaning.
 
Well, to answer the 'replace old with old' question, I bought an old rear caliper off of ebay, so I could clean/repair one, while the other was on the bike.
Once done, I have a perfect rear caliper on the bike, a spare (off of the bike) and a bit more knowedge as to how brakes work.

This strikes me as a mighty efficient way to learn, it's inexpensive, there is little to no bike downtime and if it all goes horribly wrong it's not the end of the world.

Anyway, I'm off to fire brake pistons at something, I can only sympathize with Dogma, I bet your fingers are sore , hehehehe
 
Headphase said:
Anyway, I'm off to fire brake pistons at something, I can only sympathize with Dogma, I bet your fingers are sore , hehehehe
Click to expand...

Nah, fingers are fine. Someone else around here got one squished though. The pick I was using to dig junk out of the seal grooves might be sore, but not my finges.
 
Baatfam said:
I just did two calipers yesterday...no problem...

Just wrapped a shop rag around it first...pop...caught in the rag....:p
Click to expand...

I'm a fan of the rag method. Of course not many shops rebuild calipers anymore; so one isn't truly receiving a thorough brake job.
 
Baatfam said:
I just did two calipers yesterday...no problem...

Just wrapped a shop rag around it first...pop...caught in the rag....:p
Click to expand...

That's what I'll probably do next time. For now, my compressor options require both hands, so I can't hold the caliper in my hand. If I had to do it again, I think I'd at least put it in a cardboard box.

Bottom line, this procedure really needs at least as much care and consideration as a pellet gun.
 
Personally when a stuck piston comes free. It has allot more energy than a pellet gun. You do not want it hitting any tender parts or anywhere on your face or eyes. I have a good friend going into his second year of operations trying to keep an eye from the impact of the tip of a 2X4 that spit out of his table saw. He did have protective eyeware on. The injury was massive for a little chunk of wood.
 
You must log in or register to reply here.
Back
Top