I recently bought a 309a, 3-14" 3 point plow. I put ne shins, shares, and landslides on it, all ih parts. my problem is that it is pulling to the land side, I foxund part of an old manual, it says to set wheels @ 23" from center of tractor to inside of tire, I've got that and I have set the lead ( adjusted the bar for the lift arms), but it still pulls to the left. I am running it on a ford 4600su with 14.9x28 in tires. I cant see or measure that the plow is sprung in any way, I just can't figure this one out. Any suggestions would be greatly appreciated. thank you.