 Front brake calipers dragging, Fresh rebuilt, just bled |
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| VaccaRabite |
 Jul 18 2008, 10:48 PM
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En Garde!  Group: Admin Posts: 13,729 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region 
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So, using the long tubes method, I got my brakes bled tonight. The pedal is *really* solid.
But, when I went to each caliper, the Drivers front caliper was tight against the rotor. Passenger front was dragging, but not as much. Both rears were dragging a little. On each rotor I was able to turn it, and it started to come free. However, especially the drivers front, they are not free wheeling. The rears are easy, I just re-vent them. The fronts, though. Whats going on there? I was really stomping on the brakes getting the prop valve bled. I can't imagine that I damaged something. According to Haynes there is no front adjustment. What is to keep them from dragging? The pedal cluster has also been rebuilt and bushed with bronze bushings. Everything with the brakes has been renewed (rotors, pads, calipers [ E.Shea in the back, I rebuilt the front] hard lines, soft lines) except the prop valve (which does not need it). Zach |
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| Eric_Shea |
Jul 19 2008, 01:51 PM
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PMB Performance Group: Admin Posts: 19,304 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains  |
QUOTE The fronts, though. Whats going on there? Can you describe your rebuild process? Did you clean out the knock back mechanism's in the pistons? The fronts will rely on a bit of runout to knock the pads off the rotor. Are you driving this or is this just garage testing at this point? Make sure you adjust the rears on the high side of the runout and adjust to .004" |
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| VaccaRabite |
Jul 19 2008, 01:59 PM
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En Garde! Group: Admin Posts: 13,729 Joined: 15-December 03 From: Dallastown, PA Member No.: 1,435 Region Association: MidAtlantic Region
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QUOTE(Eric_Shea @ Jul 19 2008, 03:51 PM)  Can you describe your rebuild process? Did you clean out the knock back mechanism's in the pistons? I got a rebuild kit from Pelican and followed the instructions it had. I did not pull the pistons out, as the instructions said it was not required. Calipers were split. All the rubber bits removed. All passages were throughly cleaned with brake cleaner and compressed air. All the kit parts put in as per the instructions. QUOTE(Eric_Shea @ Jul 19 2008, 03:51 PM) The fronts will rely on a bit of runout to knock the pads off the rotor. Are you driving this or is this just garage testing at this point? Make sure you adjust the rears on the high side of the runout and adjust to .004" Just garage testing. Engine is still sitting on the test rig waiting for me to finish syncing the carbs and getting the electrics fully installed in the engine bay. What is "run out?" Does that mean that the fronts are designed to get knocked free by the wheel spinning? Zach |
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Posts in this topic
Vacca Rabite Front brake calipers dragging Jul 18 2008, 10:48 PM
ejm Is the pedal push rod free play correct? Had a car... Jul 19 2008, 01:49 PM Eric_Shea
HUH? :confused: You mean the knock back mechani... Jul 19 2008, 02:03 PM
Vacca Rabite
HUH? :confused: You mean the knock back mechan... Jul 19 2008, 02:11 PM Eric_Shea Let's start with the pistons. If you did not ... Jul 19 2008, 02:20 PM Vacca Rabite I did the rebuild over the winter, and I know that... Jul 19 2008, 03:29 PM Eric_Shea Hard to say. It sounds like they're hanging u... Jul 19 2008, 03:50 PM Rav914 Mind if I jump in? Eric, how do you clean the kno... Jul 19 2008, 08:16 PM Eric_Shea For 914 pistons I recommend brake cleaner and comp... Jul 20 2008, 02:16 PM Rav914 Thanks Eric. I ask because I just ordered a rebui... Jul 20 2008, 04:00 PM melnyk
Hard to say. It sounds like they're hanging ... Jul 26 2008, 06:38 AM davep The size of hone depends on the bores you are work... Jul 26 2008, 07:08 AM melnyk well im redoing all of my calipers do you know wha... Jul 26 2008, 07:22 AM davep 42 & 33mm I'd guess; you don't say wha... Jul 26 2008, 09:46 AM melnyk
42 & 33mm I'd guess; you don't say wh... Jul 26 2008, 11:31 AM davep Please add the VIN and other data to your profile.... Jul 26 2008, 12:00 PM Eric_Shea Get the hone here:
www.mcmaster.com
6713A12
Cle... Jul 26 2008, 04:34 PM rdauenhauer
Is the pedal push rod free play correct? Had a ca... Dec 18 2011, 03:41 PM Cap'n Krusty Looking over the responses, unless I missed it, no... Dec 18 2011, 03:57 PM rdauenhauer Cap'n its an old thread I resurrected it to as... Dec 18 2011, 04:11 PM Cap'n Krusty OOPS1 Sorry about that. The Cap'n Dec 18 2011, 05:43 PM |
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