The Wingfield Flexible Harrow works very well to maintain a road, keeping pot holes and washboard from forming. However, it is a good idea to level the driveway with a scraper, then use the harrow to maintain the leveled road.
The harrow does a excellent job of preventing the formation of pot holes and washboard, but isn't ideal to get rid of existing potholes and washboard. The harrow is able to eventually level out these areas, but takes quite a few passes in order to do so. The key to using the harrow on a gravel road is to hit it right after it rains. You get the most settling of the rocks after a rain. A dirt road can be similar to the gravel roads depending on the depth of the "loose" material in the road way. Generally, you can pull over a dirt/gravel road wet or dry, but a gravel road responds the best to wet conditions.
We have sold a few harrows to Parks Departments that use the harrow to track the amount/types of wild life in the area. They use the harrow not only to maintain the dirt roads, but to also "erase" the tracks across the road every 5 days, in order to clearly see and count the animal tracks across the road.
You can use the harrow in the all aggressive setting (tines standing up) in order to get the most working per pass. Many people choose to keep the front section in the aggressive mode, and the rear section flipped on its back (front section with tines standing up, rear section with tines pointing up in the air). This setup works the ground up with the front section, and levels and dresses up the ground with the rear section, allowing you to work up and dress up all in one pass!
-Chris Wingfield
©2006
