I have a LEGO 7865 Red 12 volt train motor from a LEGO 7730 train set. The motor has stopped working as it has been dropped on one of the wheels.
How can I open the motor case to effect a repair?
According to Bricklink, Set # 7730 has this motor :
For disassembly and repair you can look at this large post with pictures on Eurobricks by Andromeda