Firstly, disconnect the machine from its power source
Disassembly procedure:
Toole needed:
M3/M4/M5 Allen Wrench
Tips: Loosen in anticlockwise, tighten in clockwise.
1. Loosen two upper screws on the buckle then take out the belt;
2. Unscrew and remove four screws from the blue base;
3. Unfix two screws on coupling
After that, please remove this drive shaft, like below.
Reassembly procedure:
Tips: put four screws and the belt into the blue base firstly, like below.
1. Insert the shaft into coupling then fix the blue base with four screws;
2. Slide the coupling to proper position as the right sides shown, then fix it.
3. fix the belt, like below.
This video is for reference:
End.