Hi waikphys,
I knew that's what you were going to ask next LOL !!!
You have to undo that nut that holds the cutter sprocket on and remove the sprocket off the reel shaft, you will probably have to place a length of timber into the reel to lock it up and stop it from rotating and then just place a socket with a breaker bar attached on the nut and give it a blow with a clench fist downwards. from there you may require a 3 legged puller on the sprocket or it may just slide off easily. How many times have I attached my puller and wound in the centre screw shaft only to have it slide straight off.
The rest is pretty much self explanatory about disassembling the reel bearing carriers and then maneuvering the reel out of the chassis.
Cheers,
BB