easier than it looks, remove all clip on parts handle, cylinder, hoses etc including brush and housing. all screws are torx type.
4 x torx head screws to remove on underneath of cleaner, you will need a long reach for one of the screws or use a small flat blade. simply pull apart, plenty of give in all plastics so are forgiving when being bent and don't snap easily.
new motors are easy enough, use a bit of fairy liquid or sinilar to help with rubber cover replacement onto new motor, line up notches and if it looks ok screw it al back together. note that power cord goes through correct hole to switch, a couple to choose from if you don't make a note. easy really
paul
September 2007