Question about 1987 Peugeot Liberte

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Peugeot expert van with stuck on brakes

Had new pads and discs fitted 2 weeks ago and since then front brakes stuck on, very hot and smelly. Garage have replaced....
Pads (again), calipers, hoses, master cylinder and now talking about replacing servo(?), not quite sure what this is, but also want to charge me for extra work. Went in for pads and discs came out with new problem that's taking over 2 weeks to fix, was something damaged when the original work was done? or just a huge coincidence?

HELP!

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It's the rod that runs from your brake peddle to the marster cylider the links seized up. need To take off and free it up

Posted on Sep 28, 2009

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I got similar porob.. new calipers and pads/disks. they tried ABS pump, new master cylinder... have replaced fluid... my brakes are fine when vehicle is cold but as it warms up the front brakes are sticking on badly. Drivable.. yea.. but a nusance.

Posted on Jan 26, 2010

  • michaelec Jan 26, 2010

    they said they did that

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The power brake servo / booster is what multiplies the pressure from the brake fluid in the master cylinder and uses it to make it easier to stop your car. If your car was stopping fine before you went in for pads and discs, it was most likely NOT at fault before the work was done.

I am not taking sides on this issue, but I have seen this problem rear its ugly head when the pistons in the calipers are retracted incorrectly to put the new pads in (say, by using a c-clamp). Most German and Swedish cars I work on (in the U.S., very few French cars here) require a tool to retract the pistons to avoid cocking them in the caliper cylinder. If the piston or cylinder gets damaged while retracting the piston, OR the boot around the piston gets torn, letting debris/contaminants into the caliper cylinder, you will for sure eventually have a siezed caliper, which is most likely what happened in your case.

At the very least, the pads and calipers were required to be replaced. All the other parts might be you being taken for a ride.

I would advise you to seek out another workshop and ask them what the problem could be, and tell them what you had done. Have your car towed to the other shop if need be.

I hope this helps you, and that this issue is resolved soon. It is very frustrating to keep throwing parts at a car without success.

Bilal Hassan
Clarksville, MD

Posted on Jun 03, 2009

  • mike_purden Feb 08, 2011

    It is a result of the caliper pistons being forced back in correctly. You must first crack the bleed nipple and then push pistons back. you will loose a little fluid. Back pressure caused by forcing pistons back with out cracking bleed nipple will cause servo pressure regulator to fail. Way to be sure this is the fault is pump brakes to seize then remove air box under bonnet and pull out vacuum pipe from servo (black circular shaped drum) you will hear a pressure releived sound and check brakes are free. If this is the case garage have been incompotetent and have damaged servo.

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Servos on these vehicle do fail.there was a recall on some.
i cannot quite see how pushing back caliper piston can damage a brake servo...a master cylinder perhaps.

if you check the psa forums this is a very common fault oft caused by sticking cross rod joints etc. have a read up.
good luck
roger

Posted on May 11, 2015

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