Here are some pictures of Greens King IV reels being worked on:
In the above photo, you can see the groomer blades on the greens mower cutting units. The bearings and adjustment hardware are worn out making it very difficult to set them precisely and have them stay there. Grooming is tricky as it is without having the cutting depth change on you. Ideally we like the little vertical blades to go into the "canopy" of the turf just slightly and lift up leaf blades that are getting too long or running sideways (about .030" below height of cut on greens). Having groomers too deep could damage the green and would eventually break groomers -- for deep cutting we have verti-cutter units. Going too shallow will have no effect at all. Since accurate adjustment is so important, the bearings and hardware on these groomers needs to be replaced once in a while to produce a quality results.
Somebody once told me Superintendents swear by groomers; mechanics swear at them. This will most likely be true in our shop sometime in mid to late January when we take them apart and start fixing them up.