Proper lawn care starts with proper mowing. Bermuda grass lawns are typically mowed to a height under 1 1/2 inches because of the cutting preference of that particular grass cultivar. Cutting bermuda grass even lower-- to between 3/4 and 1 inch high--is easiest with a reel mower. Adjusting the mower's cutting height requires few tools.
Find where the roller attaches to the reel mower. On each side you'll notice a bolt and nut that hold the roller at a particular height setting.
Loosen the nuts on each side of the roller, using an adjustable wrench. Remove the nuts completely from the bolts and pull the bolts out.
Slide the roller up to lower the cutting height of the reel mower; slide it down to raise the cutting height. Once you reach your intended height setting, slide each bolt through its respective hole to set the roller into place on the reel mower.
Check to make sure each side of the roller is at the same height and screw the nuts back on to the bolts. Tighten the nuts with your adjustable wrench.