caliper piston extractor

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flash2002

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Hi guys, I was working on my 1200 brake caliper and the pistons where stuck I mean really stuck. So I tried to pop them out with air like usual and no luck they where stuck. I decided to make a tool to extract the piston, see pictures. It works great, put the pipe in the piston turn the handle to spread the pipe, when the handle stops turning the piston brakes free and it starts turning and you just pull it out.
 

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"Necessity is the Mother of Invention".... :mrgreen:

Excellent! That's usin the ol noggin!! :clapping:
 
Parts I used, 1'' OD steel pipe about 12'' long a 5/16 rod and nuts some of the parts I made my self out of aluminium. On the pipe I cut 5 slots the length of the inside of the piston about 1 1/2'' I broke off 2 tabs so it wont be hard to spread. The aluminium parts I turn with a press drill and files, the handle was drill and tap to 5/16 .
 

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[url=https://classicgoldwings.com/forum/viewtopic.php?p=133677#p133677:1nn6tisr said:
flash2002 » Fri Oct 17, 2014 11:23 am[/url]":1nn6tisr]
Hi guys, I was working on my 1200 brake caliper and the pistons where stuck I mean really stuck. So I tried to pop them out with air like usual and no luck they where stuck. I decided to make a tool to extract the piston, see pictures. It works great, put the pipe in the piston turn the handle to spread the pipe, when the handle stops turning the piston brakes free and it starts turning and you just pull it out.

I used your idea today Flash. Instead of a pipe I used an old 3/4" R8 syle collet for a Bridgport mill. I ground the OD of the collet down until it fit snugly into the bore of the piston. Then I made a shaft with a taper and some threads on it. Came right out just like you said it would.

I made sure to give you credit when my students asked my what I was working on. Great idea :good:
 
[url=https://www.classicgoldwings.com/forum/viewtopic.php?p=139999#p139999:3s00rod0 said:
bronko37 » Thu Jan 29, 2015 3:43 pm[/url]":3s00rod0]
[url=https://classicgoldwings.com/forum/viewtopic.php?p=133677#p133677:3s00rod0 said:
flash2002 » Fri Oct 17, 2014 11:23 am[/url]":3s00rod0]
Hi guys, I was working on my 1200 brake caliper and the pistons where stuck I mean really stuck. So I tried to pop them out with air like usual and no luck they where stuck. I decided to make a tool to extract the piston, see pictures. It works great, put the pipe in the piston turn the handle to spread the pipe, when the handle stops turning the piston brakes free and it starts turning and you just pull it out.

I used your idea today Flash. Instead of a pipe I used an old 3/4" R8 syle collet for a Bridgport mill. I ground the OD of the collet down until it fit snugly into the bore of the piston. Then I made a shaft with a taper and some threads on it. Came right out just like you said it would.

I made sure to give you credit when my students asked my what I was working on. Great idea :good:
I'm glad it work's for you, :good:
 
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