 M rear calipers, What is this? |
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| smrz914 |
 Aug 9 2005, 02:11 PM
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#1
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Soon to be brightening the life of the person behind you.  Group: Members Posts: 456 Joined: 21-April 03 From: Pleasant Hill, CA or Chico, CA Member No.: 596  |
So I'm wondering what the post is for inside the bores. It's making it hard to get the pistons back in. Inside the pistons is a circlip holding something in. That something seems to grab the post inside the caliper.
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| smrz914 |
Aug 9 2005, 02:13 PM
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Soon to be brightening the life of the person behind you. Group: Members Posts: 456 Joined: 21-April 03 From: Pleasant Hill, CA or Chico, CA Member No.: 596 |
closer
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| smrz914 |
Aug 9 2005, 02:14 PM
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#3
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Soon to be brightening the life of the person behind you. Group: Members Posts: 456 Joined: 21-April 03 From: Pleasant Hill, CA or Chico, CA Member No.: 596 |
the something
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| davep |
Aug 9 2005, 03:18 PM
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#4
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914 Historian Group: Benefactors Posts: 5,143 Joined: 13-October 03 From: Burford, ON, N0E 1A0 Member No.: 1,244 Region Association: Canada  |
That is a piston retraction mechanism. Along with the rubber seal, they pull the piston back to allow venting clearance between the pad and rotor. The rotor wobble pushes the pad back. That way the pads don't rub all the time resulting in unwanted friction.
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| Krieger |
Aug 15 2010, 11:58 AM
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#5
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Advanced Member Group: Members Posts: 4,712 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None 
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Old post brought back. So I got two rear m-calipers from Parts Heaven. One had this set-up. The other does not have this set up, and is just your standard piston that looks like a cup. I need to send one back. So I can have two of the same. (I think) Which one. The one I have with the penis thingy is in not as good of shape.
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| Krieger |
Aug 16 2010, 08:52 AM
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Advanced Member Group: Members Posts: 4,712 Joined: 24-May 04 From: Santa Rosa CA Member No.: 2,104 Region Association: None
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(IMG:style_emoticons/default/icon_bump.gif) for Mr Shea.
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| charliew |
Aug 16 2010, 02:34 PM
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#7
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Advanced Member Group: Members Posts: 2,363 Joined: 31-July 07 From: Crawford, TX. Member No.: 7,958 |
Or you could buy new ss pistons without the retractor mech.
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