How do you unblock filter on Indesit WG1130d, and where is it?

Its usually a blockage in the pump body, I have removed coins, buttons etc, and yes this does stop it going to the spin cycle because the water is not drained low enough for it to go to the next part of the programme. The pump is under neath the front of the machine, the white plastic thing with a couple of hoses going to it.

Paul Stimpson
August 2007