Screw the head of crank extractor into the dust cover hole by hand until it is snug.

Screw the handle of the crank extractor into the head.

Rotate the handle of the crank extractor clockwise until the crank arm is completely loose from the bottom bracket, then remove the crank arm.

Unscrew the handle and head of the crank extractor from the crank arm and repeat the process on the other side.