hello mate it mite be easyer to just replace the hole unit. my mate one has a leak so im putting a bias pedal box on there( which i made as a replica of a ford motor sport one).ive also removed my working abs pump/valve block/loom/sensors and so on to put a bias pedal box on my 3dr as it opens up a hole load of adjustments from front to rear and you can change the power of the brakes by the cylinders