If you are just wanting to clean off the surface and are not worried about trying to level it, just drop the rake and go to work. The tines my bend a bit, but they seem to be pretty durable from my experience.
You may want to consider gage wheels for the rake. After I got mine I could see how great they are. Better than I expected when trying to level things out, or drag crushed stone on your driveway, things like that.
The gage wheels I got for my KK rake come off in about ten seconds for the pair, so I can use the rake without them if I want.
More than you asked for I guess...I suppose worst case you could break some tynes on the rake if you catch something, but with my 30hp tractor I have yet to do that. I do have a couple that are bent back a little though...
Just to be sure I am expressing myself clearly. If you lower the 3PH all the way, the weight of the rake will put some pressure on the tynes. The only way you could get more than that would be to put extra weight on top of the rake.
If you are just skimming off small branches, twigs and leaves, you will not have a problem... /forums/images/graemlins/smile.gif
I just realized I don't know for sure how to spell tynes. Or is it tines...I'm /forums/images/graemlins/confused.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif /forums/images/graemlins/blush.gif