My family farm runs a 5400 spfh. The main gearcase went out in it three years ago and I rebuilt it. Put a new clutch in it the old one looked good but didn't feel like taking a chance. I also put new cutter knives in it they are just the old j-knife style is what I call them. I used the special height tool to set them went to set the shear bar or cutting bar and on both ends of the knives I have a large gap but in the middle I can get it to its .005 to .015 range. I took a straight edge and the new knives have a arch to them the old ones where straight across on the cutting edge. Has anybody seen this before and what have you done to fix it?
Yeah I ran it for about 5 minutes, right now I can set the middle of the knife to have .005 clearance with the bar and both ends of the knife will still have 1/16" gap or lil more. And the bar is new also. Do I just need to keep grinding?