shudder when braking

druist · Post by **druist** » 17 Jun 2005, 14:49

My citroen xantia diesel TDS has just started developing this problem, i have had a slow puncture in the front tyre, dont know if this contributes, but i am getting this sort of shuddering in the front when i brake, not so noticeable at slow speeds. any ideas?

Kowalski · Post by **Kowalski** » 17 Jun 2005, 14:56

This could be one of a few things.
Firstly, warped discs can cause shuddering under braking, usually accompianied by some sort of noise that coincides with the shuddering. The top slides on the front calipers can become dry and need occasional lubrication, I've had this on both cars I've had a little bit of oil makes it go away completely.
Lastly, if your accumulator sphere is flat or if you get air into the hydraulics that can cause pulsing of the brake pedal and brakes.

druist · Post by **druist** » 17 Jun 2005, 17:22

could it be the brake pads?

Kowalski · Post by **Kowalski** » 17 Jun 2005, 17:58

I don't think the pads can cause shudder, not unless there is something really badly wrong with them, i.e. very un-evenly worn or crumbling.

sooty · Post by **sooty** » 18 Jun 2005, 02:08

I had a problem like this on my ZX, where one of the pads parted from its metal backing (glue failed) and they were only half worn. A new set of pads cured the shudder.

jeremy · Post by **jeremy** » 18 Jun 2005, 02:45

Worthwhile putting another wheel on in place of the one with the slow puncture. It sounds as though its been leaking air for some time and you may have damaged the tyre itself due to overheating or some other cause.
Then having eliminated this possible cause let us know if it still does it.
Jeremy