Member Since: 01 Nov 2007
Location: Northumberland
Posts: 66
Brake pedal to floor (eventually)
I have just been checking my rear brakes for the source of an intermittent squeak. Usual thing, wheels off, forced calipers opened slightly, checked that pads were free etc.
As the caliper pistons had been pushed back into their cylinders I ran the engine and pumped the brake pedal to re-seat the rear pads. After three presses of the brake pedal to the floor it was back to normal. Except that because I was consciously standing on the pedal to make sure that there was no further movement I became aware that the pedal was slowly moving down. (without the engine running it is rock solid)
I have discovered that (with the engine running) if I push the brake pedal hard the pedal will reach the floor after about 15 seconds continuous pressure. Is this normal?
The brakes are operating well. I have just tested them on the road. Emergency stops no problem.
Anyone else experienced this?
21st Aug 2010 3:57 pm
crwoody
Member Since: 09 Mar 2009
Location: Littleborough
Posts: 2109
Yes I found this too, a bit disconcerting at first but seems normal - to a degree.
Consider how hard you're pushing the pedal to get this to happen though - in comparison to normal braking, you're face would be through the screen of you were driving.
Its worth checking for the "oil in the vacuum pipe" syndrome though, (the subject of a recall for cars of a certain VIN range.)
This has been quite well covered before.
Member Since: 01 Nov 2007
Location: Northumberland
Posts: 66
I have had the recall done on the vacuum pipes. So I expect it is not that.
I am not convinced that this behaviour is unusual.
I agree, I cannot imagine any situation where I would have to apply that much pedal pressure for so long. As I said in the original post, the brakes work fine.
Thanks for your response.
21st Aug 2010 5:51 pm
catweasel
Member Since: 05 May 2006
Location: Bundaleer
Posts: 4805
manual wrote:
Worn pads may make the pedal travel excessive, new pads may
make the pedal spongy. Check after bedding in the pads. Check
the pedal travel. If the pedal "pumps-up", suspect air in the system.
Check for a cause for air ingress, rectify as necessary. If the pedal
sinks to the floor when held under pressure when there are no
external leaks, suspect a master cylinder fault. Refer to the relevant
section of the workshop manual.
for safety's sake, might pay to get a professional to look at.
22nd Aug 2010 2:36 am
Bill Wright
Member Since: 03 Nov 2007
Location: Glorious Devon
Posts: 3254
I had this on my D3 and I have it my D4. I had both vehicles brake systems checked by the dealer and am told that it is perfectly normal. It's a function of the servo assist according to LR.
Some on this site have commented that it is not normal and unsafe so perhaps all models do not do it for some reason. I had a loaner RRS and that was the same.
Disconcerting as it is, it appears to be just another characteristic of our beloved Land Rover.
Bill WrightNever take life too seriously. Nobody gets out alive anyway.
D4 SDV6 SE Tech Kaikoura Stone MY15.
22nd Aug 2010 7:23 am
Matty 2332
Member Since: 02 Dec 2008
Location: West Yorkshire
Posts: 670
First noticed this behaviour on mine where it failed to stop me at a T junction. Took it to the stealers who stated everything was fine, didnt need the vacuum pipe upgrade neither, hasn't done it to this degree since, but does still travel to the floor in 20 secs, bizarre
22nd Aug 2010 8:28 am
Disco_Mikey
Member Since: 29 May 2007
Location: Dundee, Scotland
Posts: 20732
Its happened in all the Disco 3's and RRS's I have driven. Wouldnt worry about it My D3 Build Thread
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