Steering wheel vibrating when brakeing

[N50pug]

Hey iv got a citreon berlingo 2 litre hdi cracking wee van had it about 4 months the pads and discs have been renewed on the front before I bought it for sum reason ther is a bad vibration in the steering wheel when brakeing iv took the sliders out and greased them and its still doing it anyone had this problem am going to check the ball joints today or could it be that the discs are warped any help would be great

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Forgot to say its a 2003 and the mileage is 114 thousand

[addo]

Check VERY carefully, the hub flange and inside of the rotor hat; corrosion here is common and induces brake judder. They need to be bright bare metal and then lightly protected with high melting point grease.

[N50pug]

Okay thanks il try that just now av not a clue what it could be am thinking it might be a sispion part but il be having a good look tonight treid another set of wheels on the front as well

[N50pug]

Treid that no difference seems to get worse the warmer the brakes get so thinking it could be the discs but the discs are like new that's on it has any1 ever had new discs that have warped in short time like 4 month old

[finny]

jack the wheel up one at a time and spin it, sometimes you can here it chaffing if its badly warped, and as what addo said if its not been cleaned properly before new discs fitted it can cause this, also have real good look over the tyres, ive seen some delaminating and causing all sorts of problems

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if the discs are chaffing that would produce heat which will make them expand and make it more noticeable, I did read its not always the disc, it could be brake pad friction material on the disc after heavy braking, you might notice a pad shape on the disc.