Rear Brakes

[Guest xantiamax]

hello

yesterday i took my 1999 xantia for a mot after its been sat on the drive for two years, and it failed on the rear brakes having on action at all, so i assumed they must be seized i started to strip them down and every thing looked free and clean. but when i had the calibre of the car and pressed the break pedaled down no fluid come for the pipe or only a few drips, i would think its should squirt out fast when i do this, so i'm guessing the problem must be else where.

any advice and help

 

thanks max

[Johndouglas]

On a Xantia most of the braking assistance comes from the front brakes. Also the rear brakes won't work well if the anti-sink sphere is flat. To bleed the rear brakes have the car standing on four wheels with the engine running. Open the pressure regulator screw under the bonnet and let the engine run for a few minutes. Close the screw, put the suspension on high and remove a rear wheel. Wedge down the brake pedal and with the engine running, fit a bleed tube and open a bleed nipple. Fluid should run out. Keep an eye on the LHM level in the reservoir.

 

It may help your MOT test if you go with a couple of bags of sand in the boot since the rear brakes respond to rear axle weight.

[Guest xantiamax]

On a Xantia most of the braking assistance comes from the front brakes. Also the rear brakes won't work well if the anti-sink sphere is flat. To bleed the rear brakes have the car standing on four wheels with the engine running. Open the pressure regulator screw under the bonnet and let the engine run for a few minutes. Close the screw, put the suspension on high and remove a rear wheel. Wedge down the brake pedal and with the engine running, fit a bleed tube and open a bleed nipple. Fluid should run out. Keep an eye on the LHM level in the reservoir.

 

It may help your MOT test if you go with a couple of bags of sand in the boot since the rear brakes respond to rear axle weight.

 

 

thank john,

i'l give that a go, but i've just looked and cant find the pressure regulator screw(dont know what it is) and is the anti sink sphere one of those green ball. i've trace is brake pipe to the abs box next to the lhm reservoir i think. should fluid come from here when the peddle is pressed?

 

thank from a novice

[Johndouglas]

i've just looked and cant find the pressure regulator screw

 

Under the bonnet. Down behind the radiator - you'll see the green accumulator sphere. On the block to which the sphere is screwed there's a 13mm hex. Undo it one turn only. Do NOT remove it completely.

 

The anti-sink sphere - which is really a brake pressure accumulator is the centre one between the rear wheels.

[Guest xantiamax]

Under the bonnet. Down behind the radiator - you'll see the green accumulator sphere. On the block to which the sphere is screwed there's a 13mm hex. Undo it one turn only. Do NOT remove it completely.

 

The anti-sink sphere - which is really a brake pressure accumulator is the centre one between the rear wheels.

 

 

well thats sorted, its hard to tell driving the car because i did even know the brakes were buggered in the first place but jacked up i cant turn the wheel with the wheel brace, the problem i originally had must have been not raising the suspension before trying to bleed the brakes.

 

thank alot john if your ever in the warrington area I'll buy you a pint