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post #10 of (permalink) Old 18th March 2007
Technical Supremo

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REar brakes

Hi Jonny G Looks like you’re getting sorted out – the sound you hear could be coming from the brake servo which is quite normal. To test - run the engine for about a minute switch off and then press the brake pedal a number of times you should hear the “hissing” sound but after several pumps of the brake pedal the sound should cease – this process empties the vacuum reservoir in the servo. Start the engine again and the sound should return when pumping the pedal. Sometimes the hub nut can be quite difficult to remove (maybe some mechanic in the past has used the dreaded air-gun). You either need a really long bar to get sufficient leverage to get it undone or take it your friendly tyre depot and see of they could undo it for you. It is recommended the hub nut be replaced each time and torqued to 118 lb/ft. As a matter if interest was the drum contaminated with brake fluid and if so did you replace and if cleaned how did you do it.
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