How do I adjust the brush height on my lawn sweeper?

To adjust, please see the "BRUSH HEIGHT ADJUSTMENT" section at the link below: https://manualsfile.com/product/k21apdbv1o2.html?page=8

How to replace the brush?

1. Remove the hopper bag from the sweeper housing. 2. Loosen the nuts connecting retainers till the brush can be removed. 3. Remove the worn or damaged brush from the brush retainers. 4. Replace with new brush by inserting the brush rib into the retainers. Tighten the nuts to fix. https://manualsfile.com/product/k21apdbv1o2.html?page=9