Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87
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.
22nd Oct 2018 12:12 pm
Dave T
Member Since: 03 Jul 2009
Location: Glasgow
Posts: 6902
start with a good clean of the callipers, pads and sliders and work from thereJoined the BMWX5 45e group
1994 Defender 90
2015 RRS Corris Grey/Black roof
2016 D4 Graphite Santorini Black
2012 D4 XS Orkney Grey
2005 D3 S Maya Gold
Convoy for Heroes 2011
22nd Oct 2018 12:22 pm
kidney wiper
Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87
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..
22nd Oct 2018 12:53 pm
Pete K
Member Since: 15 Jan 2016
Location: GL
Posts: 10368
what about the handbrake shoes at the rear?
As you say monitoring wheel temp after a journey is good
22nd Oct 2018 5:30 pm
kidney wiper
Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87
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.
22nd Oct 2018 5:41 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
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
22nd Oct 2018 6:18 pm
kidney wiper
Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87
Master cylinder has already been replaced.
22nd Oct 2018 6:44 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4666
Were all calipers bled through completely last time the system was opened?yµ (idµ - eAµ) ψ=mψ
22nd Oct 2018 7:00 pm
lynalldiscovery
Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274
kidney wiper wrote:
Master cylinder has already been replaced.
Is there any means of adjustment on the pushrod?
22nd Oct 2018 8:08 pm
kidney wiper
Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87
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.
22nd Oct 2018 8:53 pm
kidney wiper
Member Since: 15 Aug 2010
Location: In the Mere
Posts: 87
No means of any adjustment that i know of.
22nd Oct 2018 8:54 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4666
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.yµ (idµ - eAµ) ψ=mψ
22nd Oct 2018 9:04 pm
Batfink
Member Since: 31 May 2017
Location: Isle of Sheppey
Posts: 1510
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.
22nd Oct 2018 9:38 pm
PROFSR G
Member Since: 06 Mar 2017
Location: Lost
Posts: 4666
Indeed yµ (idµ - eAµ) ψ=mψ
22nd Oct 2018 11:19 pm
Brover
Member Since: 05 May 2020
Location: Pembroke
Posts: 1
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?
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