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Brakes dragging & not releasing
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kidney wiper
 


Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4
Brakes dragging & not releasing

My D4 has developed a problem where the brakes are nor releasing fully. This does not happen all the time but does happen at some point on every journey now.
If you give the pedal a hard press & release it this makes the brakes release fully. During a journey small presses on the pedal can cause the brakes to start dragging again. Not every time though.
The N/S front brake seemed to be consistently warmer than the rest so i have replaced the caliper. This made no difference.
Then it seemed that they were all tight so i have replaced the master cylinder, again this has made no difference, if you are in traffic on a dual carriageway & cannot give the pedal a full press the dragging does go away but it takes a while.
Any help greatly appreciated. Thank you.
  
Post #199383222nd Oct 2018 12:12 pm
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Dave T
 


Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6626

England 

start with a good clean of the callipers, pads and sliders and work from there
 2015 RRS Corris Grey/Black roof
1994 Defender 90

2016 D4 Graphite Santorini Black
2012 D4 XS Orkney Grey
2005 D3 S Maya Gold

Convoy for Heroes 2011 
 
Post #199383322nd Oct 2018 12:22 pm
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kidney wiper
 


Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

Front pads & discs replaced 3000 miles ago. Brembo discs & TRW pads. All caliper sliders are free. Rear pads replaced 6000 miles ago, again, all sliders are free..
  
Post #199383922nd Oct 2018 12:53 pm
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Pete K
 


Member Since: 15 Jan 2016
Location: GL
Posts: 7646

England 2005 Discovery 3 TDV6 HSE Auto Rimini RedDiscovery 3

what about the handbrake shoes at the rear?

As you say monitoring wheel temp after a journey is good
  
Post #199390722nd Oct 2018 5:30 pm
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kidney wiper
 


Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

The park brake is never applied. Also, i cant see how the full depression of the brake pedal that releases the dragging brakes would effect the park brake if that were to be the problem.
  
Post #199391222nd Oct 2018 5:41 pm
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 6793

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

Only things that links them all is the master cyl and abs unit, I would start at the master cyl as had a few seize up on old series landrover from lack of use, the std get you home fix was a hammer to the master cylinder Thumbs Up
 Give them just enough.  
Post #199392322nd Oct 2018 6:18 pm
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kidney wiper
 


Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

Master cylinder has already been replaced.
  
Post #199392722nd Oct 2018 6:44 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: IN A HOME FOR THE BEWILDERED🙄
Posts: 3107

Ireland 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Were all calipers bled through completely last time the system was opened?
 EVER TRIED. EVER FAILED. NO MATTER. TRY AGAIN. FAIL AGAIN. FAIL BETTER.  
Post #199393322nd Oct 2018 7:00 pm
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lynalldiscovery
 


Member Since: 22 Dec 2009
Location: Maidstone
Posts: 6793

United Kingdom 2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti GreyDiscovery 3

kidney wiper wrote:
Master cylinder has already been replaced.


Is there any means of adjustment on the pushrod?
 Give them just enough.  
Post #199397022nd Oct 2018 8:08 pm
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kidney wiper
 


Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

When N/S front caliper was replaced the hose was clamped & then the caliper was bled through until the fluid ran clear of any air.
  
Post #199399022nd Oct 2018 8:53 pm
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kidney wiper
 


Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87

United Kingdom 2011 Discovery 4 3.0 SDV6 HSE Auto Nara BronzeDiscovery 4

No means of any adjustment that i know of.
  
Post #199399122nd Oct 2018 8:54 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: IN A HOME FOR THE BEWILDERED🙄
Posts: 3107

Ireland 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

You might want to consider a full bleed through all calipers, there could still be air in it as the symptoms you describe suggest expanding air lock. Also, as Dave T says it would be no harm to strip out pads and make sure everything is clean and free moving.
 EVER TRIED. EVER FAILED. NO MATTER. TRY AGAIN. FAIL AGAIN. FAIL BETTER.  
Post #199400222nd Oct 2018 9:04 pm
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Batfink
 


Member Since: 31 May 2017
Location: Isle of Sheppey
Posts: 1275

United Kingdom 2006 Discovery 3 TDV6 HSE Auto Zermatt SilverDiscovery 3

What about the front flexi hoses? LR recommend they are changed every 6 years. Could be the hose partially collapsing inside causing this?
 2006 TdV6 HSE.  
Post #199402622nd Oct 2018 9:38 pm
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PROFSR G
 


Member Since: 06 Mar 2017
Location: IN A HOME FOR THE BEWILDERED🙄
Posts: 3107

Ireland 2009 Discovery 3 TDV6 Commercial XS Auto Stornoway GreyDiscovery 3

Indeed Thumbs Up
 EVER TRIED. EVER FAILED. NO MATTER. TRY AGAIN. FAIL AGAIN. FAIL BETTER.  
Post #199405622nd Oct 2018 11:19 pm
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Brover
 


Member Since: 05 May 2020
Location: Pembroke
Posts: 1

United States 2006 LR3 4.0 V6 Petrol Base 5 Seat Auto Barolo BlackLR3
I am having this same issue both front calipers locking up

Did anyone find I fix for the intermittent front brake lockup? I have changed the Master Cylinder and both calipers and a full bleed with a foxwell tool and still getting occasional brake lock up?
  
Post #214806022nd May 2020 11:50 am
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