breezecloe Posted June 30, 2007 Share Posted June 30, 2007 Hi When we apply the brakes on our discovery there is a loud hissing/whooshing type noise which sounds like its coming from the brake pedal itself. Also the brakes are not working very well now either. Does anyone have any ideas please? Im thinking servo, vacumn pump? Thanks Quote Link to comment Share on other sites More sharing options...
BogMonster Posted June 30, 2007 Share Posted June 30, 2007 internal leak in the servo would be my guess if it only happens when you press the pedal down, if it is whooshing all the time it could be the pump Quote Link to comment Share on other sites More sharing options...
breezecloe Posted June 30, 2007 Author Share Posted June 30, 2007 internal leak in the servo would be my guess if it only happens when you press the pedal down, if it is whooshing all the time it could be the pump It only happens when you depress the pedal, how can i test for an internal leak? or should i just go and buy a new servo? Thanks Quote Link to comment Share on other sites More sharing options...
BogMonster Posted July 1, 2007 Share Posted July 1, 2007 It only happens when you depress the pedal, how can i test for an internal leak? or should i just go and buy a new servo?Thanks The difference is if everything is ok it should be a gentle squish like a cowpat between your toes, if it sounds like you have just slashed a tyre it will mean there is a problem The servos are sealed units I think, so there is not really any way of proving the cause of the problem without sawing a hole in it to see if the diaphragm is split, and after that you will need a new one anyway... Quote Link to comment Share on other sites More sharing options...
JimAttrill Posted July 1, 2007 Share Posted July 1, 2007 Push on the pedal, start the engine. If pedal goes towards the floor, the servo is ok. If pedal stays where it is, it is stuffed. Quote Link to comment Share on other sites More sharing options...
breezecloe Posted July 1, 2007 Author Share Posted July 1, 2007 The difference is if everything is ok it should be a gentle squish like a cowpat between your toes, if it sounds like you have just slashed a tyre it will mean there is a problem The servos are sealed units I think, so there is not really any way of proving the cause of the problem without sawing a hole in it to see if the diaphragm is split, and after that you will need a new one anyway... Thanks,will give a try. Quote Link to comment Share on other sites More sharing options...
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