MKI / MKII S type 240 340 & Daimler 1955 - 1967

Mark 2 brakes not release after new system installed

 
  #1  
Old 04-15-2019, 02:34 PM
Junior Member
Thread Starter
Join Date: May 2016
Location: US, RI
Posts: 23
Liked 1 Time in 1 Post
Default Mark 2 brakes not release after new system installed

Haven't done much troubleshooting yet but figured I throw the issue out here anyway. I recently finished rebuilding/replacing the brake system on my Mark 2. Drove out of the driveway and after a few taps realized brakes were not releasing. The work completed to date includes new master, new lokeed booster, wilwood front upgrade, rear cylinder/handbrake refurbishment, and some new lines. Had to crack a line coming out of the booster to release pressure to get it back in the driveway. Thanks for any two cents in advance.

John
 

Last edited by GGG; 04-17-2019 at 10:45 AM. Reason: Edit typo in thread title
  #2  
Old 04-15-2019, 07:45 PM
Glyn M Ruck's Avatar
Senior Member
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 415
Liked 74 Times in 66 Posts
Default

If Auto check the anti creep valve & circuit.

Can also be the servo. Sticking/tight main vacuum piston seals or air valve sticking.

Good luck!
 
The following users liked this post: Glyn M Ruck
JohnnyMacc (04-16-2019)
  #3  
Old 04-16-2019, 05:53 AM
Junior Member
Thread Starter
Join Date: May 2016
Location: US, RI
Posts: 23
Liked 1 Time in 1 Post
Default

Last night we did some more troubleshooting and when we removed the vacuum hose no locking so definitely something with the booster. I might put the original booster back in as it may be fine.
 
  #4  
Old 04-16-2019, 06:43 AM
Glyn M Ruck's Avatar
Senior Member
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 415
Liked 74 Times in 66 Posts
Default

Funny ~ when I got up this morning I was thinking about it & was going to suggest you pull the vacuum hose but you beat me to it.
 
  #5  
Old 04-17-2019, 06:20 AM
Junior Member
Thread Starter
Join Date: May 2016
Location: US, RI
Posts: 23
Liked 1 Time in 1 Post
Default

Good News! Removed the Lockeed booster and replaced with one of the original units I had, bled the systems and I now have functioning brakes that don't lock up on their own. Guess the old saying if it aint broke dint fix it rings true again. I may send out another original unit I have to be rebuilt at some point. Test drive planned after work.

Thanks
John
 
  #6  
Old 04-17-2019, 06:27 AM
Junior Member
Thread Starter
Join Date: May 2016
Location: US, RI
Posts: 23
Liked 1 Time in 1 Post
Default

 
The following users liked this post: JohnnyMacc
S-Type Owner (04-17-2019)
  #7  
Old 04-17-2019, 09:42 AM
Glyn M Ruck's Avatar
Senior Member
Join Date: Jul 2012
Location: Llandudno, Cape Town, South Africa
Posts: 415
Liked 74 Times in 66 Posts
Default

Good news! Damn servos/boosters.
 
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Gaelic 12
UK & Eire
1
04-30-2018 05:49 AM
klintous
XJ XJ6 / XJ8 / XJR ( X350 & X358 )
8
07-16-2017 11:46 PM
mikchek
S-Type / S type R Supercharged V8 ( X200 )
2
05-31-2013 11:04 AM
S-Type / S type R Supercharged V8 ( X200 )
3
08-24-2009 07:09 AM
XJ6 & XJ12 Series I, II & III
2
05-07-2007 05:06 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 

Thread Tools
Search this Thread
Quick Reply: Mark 2 brakes not release after new system installed


Advertising
Featured Sponsors
Vendor Directory

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: