X type brake problems

[Norman Hood]

I recently bought my beautiful xtype, 2.2 diesel sports, such a lovely car, however, I went out 2 nights ago & a brake pipe burst, so I got it home & called AA out.

turns out a pipe was corroded on the rear & burst.

i called a mobile mechanic who replaced both rear pipes with copper Ines & bled the brakes, took it for a test drive & felt fine, within half an hour & less than 5 miles, the brakes started binding to a point they have almost siezed on, what is the reason for this?

my mechanic said it's the master cylinder, is this correct & has it happened to anyone else & what's the cure?

thank you

[JOE-DOT-COM]

Hi

you need to find whether its the front or rear first, if its the rear, its more than likely something your mechanic has done, especially if you hav'nt had any issues prior

can't see it been the master cylinder, I've never seen one fail that makes the brakes stick on, they either leak or the seals fail and the pedal goes very low

If its the rear brakes that are binding, jack it up and find which side it is

I'd check if the adjusters have been set right, if they been set too tight they might seize as they get hot, if there's no enough clearance

also if the adjusters are set correct and the hand brake cables are free, Ive seen copper brake pipes crimped incorrect so that they trap the fluid

cheers

Joe
 

 

[Norman Hood]

1 hour ago, JOE-DOT-COM said:

Hi

you need to find whether its the front or rear first, if its the rear, its more than likely something your mechanic has done, especially if you hav'nt had any issues prior

can't see it been the master cylinder, I've never seen one fail that makes the brakes stick on, they either leak or the seals fail and the pedal goes very low

If its the rear brakes that are binding, jack it up and find which side it is

I'd check if the adjusters have been set right, if they been set too tight they might seize as they get hot, if there's no enough clearance

also if the adjusters are set correct and the hand brake cables are free, Ive seen copper brake pipes crimped incorrect so that they trap the fluid

cheers

Joe
 

 

Thanks for the reply.

im not sure about adjusters or where they are & my mechanic knows what he's doing.

it was read on a forum to release the master cylinder  which he did, & he cleaned it out & put it back on & it freed them, but not for long.

ive ordered a new unit which I will receive Monday, it was the rear wheels that locked on but now I think maybe all 4

[JOE-DOT-COM]

Hi

If its all 4 wheels, on the servo, there's a non return valve that allow vacuum in, only

if the non return valve has failed,if you car is a turbo diesel, it may allow boost, positive pressure to get trapped in the servo

pressure in the servo, will be like pressing the brakes

also make sure the brake pedal comes all the way backup, as that can cause the brakes to bind

cheers

Joe