I have a new L3200. I have a box scraper on it. When I move the 3 point lever to the raised position, the box only lifts 6" off the ground. It hits constantly when driving around the property. The 6" is when on level ground with the box level. It won't even go high enough to remove the scarifers. For reference on the lever position, highest point is position number 9, and the box hits the ground at position number 7. Thank you in advance for your help!