Change the blade disc on Automower 220AC and 230ACX
Here is a step by step guide of how to disassemble and replace the blade disc on the Husqvarna Automower 220AC and 230ACX. The same principle applies for both 260ACX and 265ACX.
A cracked or damaged blade disc causes an imbalance in the cutting system that can result in missing blades or noise from the robotic lawnmower.

Changing the blade disc is a simple process and doesn't require any special tools. See below for step by step instructions.
At the bottom of the page there is a list of the spare parts needed for the job.

Tools we use: Torx screwdriver T20, Allen key size 4.

Step 1: Turn your Automower over. Unscrew the four marked screws that keep the engine protector pkate in place.	Step 2: Lift off the skid plate and the cover. Loosen the centre screw that secures the bearing retainer. Use a size 4 allen key and hold the blade while loosening the screw. This screw can be tight and you may have to use a lot of force. This screw usually has a right-hand thread.
Step 3: When you've removed the centre screw, you can lift up the bearing holder. Then unscrew the three torx screws that hold the blade disc in place.	Step 4: Lift off the blade disc.
Step 5: Insert the new blade disc (assemble the new blades on it first). Screw in the three screws.	Step 6: Replace and tighten the centre screw holding the bearing holder.
Step 7: Put the engine protetor plate and the lid back on and screw in the four screws that secure the cover and skid plate.

Make sure all the parts can rotate freely after you have finished. Then just use your Automower as usual.