Replace wheel motor of Husqvarna Automower 320, 330X, 420, 430X, 440 or 450X

Tools we use: Torx screwdriver T20, ring spanner size 24.
Spare parts used: https://www.gplshop.co.uk/en/motor-ki...
https://www.gplshop.co.uk/en/seal-chassi

Here is a step by step guide of how to disassemble and replace the wheel motor on the Husqvarna Automower. This guide applies to Automowers 320, 330X, 420, 430X, 440 and 450X. A faulty wheel motor can often generate the error code "Wheel motor blocked" or you notice that the robot goes in circles because only one motor is operational. Before starting to change the wheel motor, you should ensure that it's actually the motor that is at fault, as a damaged motherboard could be the cause of the problem. For example, if you see the error code "Right wheel motor blocked", you can try moving the right wheel motor to the left side (or vice versa). If the error is still present on the right side, the most likely cause is a defective motherboard, so replacing the drive motor will not fix the error.