My Pump went a few months back , all it was , was the brushes needed a scrape , they are spring loaded , so be carefull if you dismantle it , not had a problem since ,, its fiddley putting it back together , with the springs , I used very small bogie sized bits of Blu Tak to hold them back whilst putting it back in the caseing , or rather we did , an junior apprentice on a job helped me out , I`m not that mechanically minded -- if we did it , anyone else can