2. Disassemble the cracked case.
2.1 Disassemble the black base.
2.2 Disconnect the motor cables, switch wire, and the 5-pin front end signal cable.
2.3 Disassemble the motherboard PCB.
2.4 Disassemble the base encoder board.
2.5 Disassemble the base reducer.
3.1 Replace the base bearing to the new case part.
3.2 Put the motor cables and 5-pin cables through the case.
3.3 Assemble the reducer.
3.4 Assemble the encoder board.
3.5 Assemble the motherboard.
3.8 Assemble the black base.