1. Use a 2mm wrench to slightly loosen the screws on the extruder handle.

1.Use a 2mm wrench to loosen the screw on the extruder handle and remove the handle. 2.Use a 2mm wrench to loosen the 3 screws on the extruder and remove the entire extruder. 3.Use a 1.5mm wrench to tighten the set screw. 4.Reattach the extruder and tighten the screws. 5.After reattaching the handle, tighten the screws.