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Rock hard brake pedal !!!

Posted: Wed Nov 29, 2017 11:59 pm
by dirtydirtydiesel
As the title state's
Jumped in the old girl tonight after work, drove across the car park put my foot on the brakes :shock:
W.T.F rock hard brake pedal & no brakes :shock: , managed to get her to stop ( luckily I wasn't going very fast)
Pressed the brake pedal really hard & it worked :roll:
Pumped them a few time's before driving home very gingerly :?
I have no faith in them now, Anyone got any ideas / heard of this before

All advice appreciated, many thanks DDD.

Re: Rock hard brake pedal !!!

Posted: Thu Nov 30, 2017 8:08 am
by trem1
Was the vac pump on my first 407,scared the sh*t out of me when it first did it.

Sent from my K013 using Tapatalk


Re: Rock hard brake pedal !!!

Posted: Thu Nov 30, 2017 9:00 am
by frog
Same problem as this one?
Or would have except the pedal didn't move! Luckily I was going slowly and the handbrake managed to bring it to a halt. Moved off, very slowly and applied brakes again, pedal went down but I could feel it grinding a bit through the pedal. Managed to limp it home through the quiet backstreets and have left it there since, it was just downright bloody dangerous!

Re: Rock hard brake pedal !!!

Posted: Thu Nov 30, 2017 10:53 am
by PeterN
Yes sounds as though have no vacuum, the brakes aren't very good without it :shock: Either the vacuum pump as mentioned or the brake servo or a vacuum leak somewhere. If its an Hdi there won't be much turbo boost either, just changed mine for that reason and it improved the brakes as well. Check the solenoids on the bulkhead behind the top of the engine for leaking rubber pipes.

Peter

Re: Rock hard brake pedal !!!

Posted: Fri Dec 01, 2017 9:13 pm
by dirtydirtydiesel
Thanks for the imput guys,
No frog not like that,
Quite sure now having been reading up on the subject that the servo non return valve is fubared :roll:
Spoke to my local steelers, gonna order one in the morning.

I'll post up the results.

Re: Rock hard brake pedal !!!

Posted: Mon Apr 09, 2018 11:08 am
by DefTrap
Think the servo non return valve has gone on my HDI 90 as well.

These parts are hard to track down online or am I searching for the wrong thing?

Can anyone point me in the right direction? If someone has the p/n for a servo check valve for a 2002 HDI 90 that would be grand.

Re: Rock hard brake pedal !!!

Posted: Mon Apr 09, 2018 5:09 pm
by steve_earwig
Looks like
4599 31 BRAKE AMPLIFIER KIT
BOSCH. -
- EXCEPT EW10D INJECTION
vacuum valve.jpg
Not sure if this is right but it's where I'd expect to find it...

Re: Rock hard brake pedal !!!

Posted: Mon Apr 09, 2018 11:08 pm
by dirtydirtydiesel
Yup , that's what I bought steve :D

Re: Rock hard brake pedal !!!

Posted: Tue Apr 10, 2018 12:26 am
by DefTrap
steve_earwig wrote:
Mon Apr 09, 2018 5:09 pm
Looks like
4599 31 BRAKE AMPLIFIER KIT
BOSCH. -
- EXCEPT EW10D INJECTION
vacuum valve.jpg
Not sure if this is right but it's where I'd expect to find it...
Awesome, thanks.

Re: Rock hard brake pedal !!!

Posted: Tue Apr 10, 2018 11:29 am
by DefTrap
dirtydirtydiesel wrote:
Mon Apr 09, 2018 11:08 pm
Yup , that's what I bought steve :D
Was that the part that fixed the issue on yours in the end?

Re: Rock hard brake pedal !!!

Posted: Tue Apr 10, 2018 5:55 pm
by dirtydirtydiesel
It was this time round for me but it can also be the servo it's self and or the vacuum pump.
I just went for this first as it's the easiest and cheapest. :)

Re: Rock hard brake pedal !!!

Posted: Tue Apr 10, 2018 6:26 pm
by stevewalsh
Replaced servo on mine, Not an easy job with the engine in

Re: Rock hard brake pedal !!!

Posted: Wed Apr 11, 2018 10:48 am
by PeterN
Failure of the vacuum pump will affect the turbo boost as well, so if yours goes OK it will be a servo fault.

Peter

Re: Rock hard brake pedal !!!

Posted: Wed Apr 11, 2018 3:45 pm
by DefTrap
Well the garage diagnosed mine as a servo issue, so they're doing it today. ;)

Re: Rock hard brake pedal !!!

Posted: Wed Apr 11, 2018 4:54 pm
by steve_earwig
I hope they're trustworthy...

"Nah, sorry mate, you're gonna need a whole new car." :shock: