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Sinking Brakes
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norto
 


Member Since: 10 Apr 2006
Location: batemans bay
Posts: 1603

Australia 2005 Discovery 3 TDV6 S Auto Chawton WhiteDiscovery 3
Sinking Brakes

I dont know if this has been posted before, so apologies if it has

Everyone should check before their warranty runs to see if
when the engine is running and the brake pedal has a lot of pressure on it,
the pedal eventually goes to the floor. Under normal driving conditions
the brakes work fine.
It could be an expensive fix when the car is out of warranty.
 Peter
D3. The best 4x4 i have ever driven,
the worst car i have ever owned. 


Last edited by norto on Wed Jan 14 2009 8:54am. Edited 1 time in total 
Post #401960Wed Jan 14 2009 8:42am
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Discoeast
 


Member Since: 19 Feb 2008
Location: Boksburg
Posts: 774

South Africa 2007 Discovery 3 TDV6 S Auto Zermatt SilverDiscovery 3

norto Thumbs Up Good to know.
 D3 bullbar-spots-roof rack with spots-ladder-long range tank-swing out spare wheel carrier- upgraded tow bar-dash console-internal water tank-duel awnings-drawer system & T T.  
Post #401962Wed Jan 14 2009 8:48am
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Bill Wright
 


Member Since: 03 Nov 2007
Location: Glorious Devon
Posts: 1382

United Kingdom 2012 Discovery 4 3.0 TDV6 XS Auto Firenze RedDiscovery 4

Norto

I had similar symptoms after my last service. I took it back and the dealer installed a new master cylinder. That worked fine until yesterday (so about ten days worth) and then yesterday as I was nearing home (having been using the brakes a fair amount), the pedal went to the floor. A couple of quick pumps and it was okay again - but it'll have to go in for another check. It looks like a serious situation with my brake system at least. It looks it wasn't the master cylinder after all.

Bill Wright
 D4 TDV6 XS Firenze Red MY12  
Post #401972Wed Jan 14 2009 9:39am
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stapldm
 


Member Since: 11 Sep 2006
Location: Swine Town
Posts: 2302

United Kingdom 2007 Discovery 3 TDV6 HSE Auto Stornoway GreyDiscovery 3

Norto, I too have had this sinking feeling, but it has been intermittent. What exactly is the cause? I was informed by my dealers that it was not an issue.
 Dr. Ian Malcolm:
"Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should."
Transgenic tomato anyone? 
 
Post #402019Wed Jan 14 2009 11:00am
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norto
 


Member Since: 10 Apr 2006
Location: batemans bay
Posts: 1603

Australia 2005 Discovery 3 TDV6 S Auto Chawton WhiteDiscovery 3

I have only spoken to the dealer briefly and
he is concerned about the problen.
I think its brake fluid leaking past the piston in the master cylinder
caused by contamination in the vacuum cylinder
 Peter
D3. The best 4x4 i have ever driven,
the worst car i have ever owned. 
 
Post #402041Wed Jan 14 2009 12:08pm
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Flack
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Member Since: 06 Sep 2006
Location: Preston Lancashire
Posts: 1378

England 2007 Discovery 3 TDV6 XS Auto Stornoway GreyDiscovery 3
Brake Pedal

I have just noticed the same today on my car, the brakes work perfect but when you sit with engine at idle and press the brake pedal hard it goes down to the floor. I remember reading somewhere that this could be a leaking servo.. ???

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Post #413921Mon Feb 02 2009 10:33pm
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Bill Wright
 


Member Since: 03 Nov 2007
Location: Glorious Devon
Posts: 1382

United Kingdom 2012 Discovery 4 3.0 TDV6 XS Auto Firenze RedDiscovery 4

Mine has been taken in to the Taunton Land Rover workshop where it has been for 12 days. Big Cry They have been in touch with LR technical department who, after a week's head scratching have offered the problem to LR Engineering.

They have no solution so far.

Any other ideas from across the forum?

Bill Wright
 D4 TDV6 XS Firenze Red MY12  
Post #423082Mon Feb 16 2009 6:18pm
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DaveT
 


Member Since: 01 Aug 2005
Location: Cornwall
Posts: 1609

United Kingdom 2008 Discovery 3 TDV6 SE Manual Stornoway GreyDiscovery 3

Noticed this on my first D3. If you applied constant pressure to the pedal when stationary (not particularly hard, just constant), the pedal would reach the bulkhead. Always fine in use.

Service Mgr checked it & declared it normal. Something to do with the way the system works (insert TFC technical solution here please!)
 D3 number 3: 08 TDV6 SE Stormygrey /owlpacker
Evoque. Gone. Prefer the Disco. D4 next??
SIII Lightweight - neglected & rusting. Bulkhead now disintegrated - Next years project! 
 
Post #423230Mon Feb 16 2009 9:28pm
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