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Brake Problems!


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300tdi defender, non egr, non cruise, non abs.

I was getting Hiss and loss of servo assistance the other day, the Vacuum pump seemed ok (enough to hold the pipe to my finger).

So I went out and fitted a new servo and replaced all the rubber pipe with new, the brakes are now excellent under manoeuvring speeds, but from 30mph or so the pedal stiffens up and hisses nearing full stop.

As the new servo improved braking I can only assume that it is working well, as it the non return valve. So what could it be? Vac pump does not leak or make machine gun noises so is it at fault?


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