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URGENT HELP WITH DISPATCH BRAKES ++FIXED+++

Posted By snap-on 2/27/2008 2:37:36 PM
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snap-on
 Posted 2/27/2008 2:37:36 PM
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As above if possible ? my dad has a citroen dispatch 1.9d on a xreg (01) . i have just done a service and replaced front brake discs and pads . once in the van started to pump brake pedal which was pumping up nice and hard then a thud and nothing - no pedal ?

Had similar problem last year after his mot was done and passed the brake pedal was soft and spongy just like the master was on its way out but soon came back ! wasnt like it before mot ?

Had a good look today and its as though the pedal is not connected to anything ! so i removed master cylinder to see if the rod inside the servo was moving when you pressed the brake pedal which it is ? also removed the rubber cover on the bulkhead to see that back of the pedal mechanism which all looks fine exept for a lot of free play which is adjustable on the rod (the pedal connects to a rod which then tavels in a tube across to the servo) . i then held an extension bar on the rod that sits in the servo to give it pressure and got my dad to see if there is a pedal at all which there was , so as far as im concerned nothing seems to have broken in the rod to pedal area .

I then fitted a new master and bled the system with plenty of fluid coming from each nipple . had a brake pedal but loads of free play in the pedal before it does anything ? start the van up and just a hard pedal right at the bottom of its travel , try moving the van and applying the brake and nothing just a hardish pedal right at the end of its travel ? removed pipe from vacumn pump and its sucking , refit and remove pipe from servo and its sucking and also looses its presure when i pulled the pipe out from servo ?

Has any one come across this problem before or could it be the servo ? i cant see why changing discs and pads would create a servo problem ? or has something in the rod to servo side broken ? i have never had one of these apart before and you cant even access behind the servo unless you remove it all !!!

Im hoping someone has had a similar problem or there is a common fault with the pedal set up as its similar to the fiat scudo , peugeot expert and its now doing my head in !! he needs it for work and i need it of my ramp !!

I know this forum is normaly for engine managment issues but im lost and thought i would ask as im sure these is a citroen expert on here !! many thanks

2/29/2008 2:49:19 PM by snap-on
K And R
 Posted 2/27/2008 3:57:19 PM
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Snap on.

Try doing a Forum search usng Fiat Scudo brake,sWinkWinkBigGrin

Kev.

"If you dont KNOW how it works, don,t try to test or fix it"

Chris Venning
 Posted 2/27/2008 4:32:19 PM
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Kev, there was something about this recently, I have a feeling it may have been on TBK, Steve & Phil, I thinkErmm

I could give up Stella, but I'm no quitter. Beer Drinker 
snap-on
 Posted 2/27/2008 4:49:19 PM
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Chris Venning (27/02/2008)
Kev, there was something about this recently, I have a feeling it may have been on TBK, Steve & Phil, I thinkErmm

????? BEEN ON TBK ??

K And R
 Posted 2/27/2008 4:55:29 PM
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Snap on.

Forget TBK do the Forum search as above.

Kev.

"If you dont KNOW how it works, don,t try to test or fix it"

snap-on
 Posted 2/27/2008 5:11:47 PM
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just read that post but i dont have a pedal at all really just at the bottom of the travel ! its as though something has snapped in the servo area as its just like putting your foot on nothing ! i dont even have half a pedal or servo working as such but i just cant understand why its just done this after discs and pads ? but the pedal did go with a bang after a few pumps to pump it up !

is it engine out to do the servo does anyone know ?? as it might be something behind the servo that has half snapped or something ? i will try and clamp the hoses tommorrow to see what happens and will let you know !!!!

Thema
 Posted 2/27/2008 5:59:12 PM
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I'm sure you have thought of this but you havent had a brake pipe or hose burst? Just the way you said it went with a bang made me think...
Chuck_Wagon
 Posted 2/28/2008 4:32:32 PM
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snap-on,

It's time to go back to basics here.

Clamp all front and rear brake hoses with whatever you've got - mole grips, brake hose clamps etc. When they are all clamped, does this make any difference, ie, do you now have a hard pedal?

If yes, then start removing the clamps, one at a time, starting from the rear and checking the pedal each time. When one clamp makes a difference, you have air in that circuit and more bleeding will be required.

If, when all the brake hoses are clamped, and you still dont have a hard pedal, then there could be air trapped in the ABS modulator. Does it have ABS?

Try the above and come back.

Chuck


To help and to serve

Speedy
 Posted 2/28/2008 7:12:56 PM
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As above ..............will identify where the problem is

Could be the seals pulling the pistons back

Halcyone
 Posted 2/29/2008 3:03:51 AM
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Hi

Not trying to be rude but are the front pads fitted correctly, I have seen this with incorrectly fitted pads !!!!

Cool 

I would rather be sailing                                                              


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