Late model 8N. I bit the bullet last week and replaced the front axle pin. A job getting it out, but got 're done finally. Took it for a brief drive and no problems. Attached the mower and after hitting a fairly shallow dip, I heard the fan blade hit the shroud lightly. Continued mowing with no more tings. Well yesterday, the tings were back in full force. The blades are hitting the shroud without the tractor being in motion. I rev the motor and the noise starts. Can't tell where the blade is hitting the shroud, but can see a fan blade or two with dings on the tips. Think I've got to take the hood assembly off to fix this problem, but once it's off, what do it do once I find where it's hitting the shroud? Do I try to grind the shroud, bend the edges of the shroud, or even grind the tips of the fan blades? Thanks, Spencer in Tallahassee