I have what "appears" to be a Ford 4000 tractor. I just bought a county line 5' rotary cutter and I have used it a few times. The problem is that it is not straight behind the tractor. When I lift it off the ground I can straighten it but when it lowers it veers to the right. Is there a way to tighten or adjust the lower lift arms to hold an implement straight. It is causing the cutter to vibrate when engaged if it is to the side. While the cutter is straight it is fine. Sorry for my ignorance. I am a newbie. Thanks.