Take your time splitting the casing once you've removed the screws. If you need to pry the casing apart please be careful with how you use your screw drivers! Start by taking off the casing at the front (pulley end)...
...and you should be able to see the rotor inside. If you can, lift the rotor out. Mine was a bit stuck so I had a little bit more trouble removing the back part of the casing. With care you can “ping” the stator away from the back casing...
...and access four 7mm hex head screws that hold the plastic electrical assembly housing (which contains the diodes etc) in the back cover.
You need to be careful at this stage otherwise you'll have to do some soldering! Three wires run from the armature to this electrical assembly – don't break them!
You should now be able to pull the stator (and rotor if it was stuck) away from the back casing.
