I had a large pile of dirt that had been sitting in my front yard for about 9 months since my new construction was complete. I rented a bobcat s185 to move the pile to the back of my split grade lot where I could use it as fill. Its mostly clay/brown dirt. Using the bobcat was easy enough from an operational standpoint, but I had a difficult time getting the bucket to dig into the flatter parts of the pile or to get the bucket to dig down on level ground. I would lower the arms and tilt the bucket down and drive forward but the bucket wouldn't dig in, just slide across the surface until it reached the more vertical part of the pile. The gound wasn't bone dry or anything, it was moist. And again, the dirt pile was a clay/brown dirt mixture. (mostly clay) This of course left me with a pretty sizeable mound that I couldn't get down into. Is the bobcat not the right machine? Do I need a bucket with teeth on it? Or is there a technique to get it to work better?