Rear Brake Caliper Questions |
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Rear Brake Caliper Questions |
ljubodraz |
Apr 28 2017, 02:26 PM
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#1
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Member Group: Members Posts: 64 Joined: 4-May 14 From: Chicagoland Member No.: 17,312 Region Association: Upper MidWest |
Firstly, many thanks to Eric Shea and the rest of you who have written threads that are helping me rebuild my rear brake calipers on my own.
I've got a few questions so far as I wait for parts: 1. What is the purpose of the mechanism within the brake pistons? Does it allow the piston to extend and retract beyond the limits of the adjustment bolt that threads into it? 2. Is there anything I should do to test that it's working properly? 3. I see that Eric Shea recommends and uses Permatex Ceramic Extreme Brake Parts Lubricant for assembly purposes. I've also seen other threads saying to only use some hard to find $$$ ATE paste. Aside from lubricating the parking brake mechanism that pushes the internal bolt, can't I (should I) simply use brake fluid to lube the pistons and seals during assembly? Unlike Eric's calipers, mine won't be sitting around too long before being installed preventing the brake fluid from absorbing water. |
ljubodraz |
May 22 2017, 11:07 AM
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#2
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Member Group: Members Posts: 64 Joined: 4-May 14 From: Chicagoland Member No.: 17,312 Region Association: Upper MidWest |
Jeff, I greatly appreciate your response. The thing is, "knock-back" is only one function of the mechanism in the rear pistons. One of the next things I am contending is that the design is intended to auto adjust venting clearance with pad wear. All I have ever read here is that we must regularly check the clearance and manually adjust because they don't auto adjust like the fronts.
Please read post #5 (IMG:style_emoticons/default/headbang.gif) The knock-back is achieved by two wavy washers in the mechanism that get compressed when you apply the brakes. When you release the brakes the washers expand pushing the pistons back. My theory for auto adjustment of how venting clearance is supposed to work is explained in my post #5. I'm trying to get the collective wisdom here to either confirm or deny whether they are supposed to auto adjust venting clearance. |
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