Used to fix the belt and adjust the belt tension.
The spring is loose and the belt can no longer be tightened.
H3.0 Allen wrench
New belt adjustment kit
¶ 4. Install the new belt adjustment kit and install the belt on the pulley.
¶ 5. Fix the belt adjustment kit, re-adjust the belt tension, re-level the hot bed and re-compensate for vibration.
https://youtu.be/GahToSlKlMo