 How to set brake rear pressure regulator preload?, I have two and they are set differently. |
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| GeorgeKopf |
 Jun 27 2025, 10:31 PM
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Member  Group: Members Posts: 230 Joined: 9-February 21 From: Princeton, NJ Member No.: 25,186 Region Association: MidAtlantic Region  |
Time to figure out my braking system. I have two old and crusty rear pressure regulators. I'm going to tear them down and refurbish one. I noticed that their adjuster screws are set at different depths.
Is there a way to determine proper preload? Thanks. George |
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| mepstein |
Jun 28 2025, 11:37 AM
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914-6 GT in waiting Group: Members Posts: 19,953 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region 
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The late Brent Brock / bbrock had a pretty comprehensive write up on his build thread.
http://www.914world.com/bbs2/index.php?sho...mp;hl=Regulator “Just to close this out, I emailed PMB about setting the regulator or sending it in to have them do it. I got an email from the man himself saying that if I didn't have a gauge and hydraulic pump, I could just adjust the adjuster so it protrudes 10mm out of the spring housing as that's close to where they all seem to be set from the factory. I'm going to take it to the local European car specialist that does most of the German car work around here and see it they can set it. If not, I'll just follow Eric's suggestion.” |
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Posts in this topic
GeorgeKopf How to set brake rear pressure regulator preload? Jun 27 2025, 10:31 PM
930cabman :popcorn: Jun 28 2025, 04:59 AM Geezer914 Take note of how many threads are exposed so you c... Jun 28 2025, 05:21 AM
Superhawk996
Better yet, send it to PMB for a rebuild.
:agre... Jun 28 2025, 10:50 AM GeorgeKopf I measured both of my adjustment screws and one is... Jun 28 2025, 11:29 PM zulu33
George, this ist what the manual said.
Use only... Jun 29 2025, 04:28 AM 930cabman Achtung to you too Jun 29 2025, 09:30 AM Montreal914 There is a thread with related information but no ... Jun 29 2025, 12:00 PM 930cabman Mine is 12MM, PMB is the right answer Jun 29 2025, 03:49 PM |
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