I have been asked to look at a friends zanussi jetsystem 1200-it looks as though the impeller is jammed-it looks like the pump should unclip,but i am worried about breaking a tag or something,as i can't see an obvious method of detaching the clips-it must be simple,there does seem to be a triangular socket head screw in the base of the moulding the pump is attached to,-or should i just undo the three screws which hold the motor to the pump body? Any help much appreciated