What was the answer? Brakes "sticking" multiple choice!

[shithotfast]

Hi there....
There were a few topics which covered "sticking" brakes, IE when the pedal is released, the brakes can "stick on" for a short time, then release. Some said BIAS bar , some said SERVOs needed replacement, some that it was the master cly? then the topic went into A Level physics for a while.... Help? Problem just started with my ford brakes, (has servos) so what was the answer after all? Anyone find the cure?

Perhaps the answer should go into FAQ as it seems a few had had the problem?

[GTRMikie]

I originally had Ford brakes with servos and never had a sticking problem. However when I upgraded to AP brakes, leaving the servos connected, the rears used to lock on solid and would only free off by giving the brake pedal a hefty prod. I disconnected the servo vacuum pipe at the manifold and the problem disappeared, with no loss of braking efficiency, although that might not be the case with the Ford brakes!!

[menostig]

My AP racing brakes would quite frequently 'stick' on, say when I'd pull away from a junction or other stoppage which I'd pulled upto gradually, they'd release after a few metres making the car surge. Otherwise worked faultlessly in particular on hard-stops. Spoke to Factory, spoke to AP Racing, both asked this as the first question - have you got servos ? I said yes, they both independently said, "these brakes aren't designed to work with servos". I had the servos removed from the brake plumbing but left in the car cos awkward to remove, and hey presto no more sticky brakes. Sure I have to lift my heel to get the full-on braking effect now, but it's worth it because sticky brakes are rubbish. This also worked for another Sports owner on this forum who had exactly the same symptom.

regards
Roger

[martinlaw]

Hi,

I had exactly the same problem with my Sport (Willans brakes)

My rear kept locking on - I replaced the servo but no different so I took off the vaccum hose at the inlet manifold.

Brakes now are brilliant - ok you have to press a little harder but this is not a problem, particularily when they are warmed up.

Try this and see if it works (be careful as I am not sure how efficient Ford brakes are without servos)

[shithotfast]

UPDATE : Removed the servo pipe off the carb end and blocked the carb hole to see what happens.
Drove the car - sticking GONE. Brakes, feel much the same, just need a bit more of a push but not that much. Actualy "feel" better so all sorted.

So Sticky brakes = servos! (still dont know why but its fixed anyway!)