Mine was an older version that had big heavy harrow spikes, seed box, then spiked roller on the back. I did a quick check, and found some pics from an equipment site, of one like it. I was the Gill/Woods SU660.
Woods SUPER SU66 Air Seeder MGD TRACTOR & EQ., INC. LEBANON Pennsylvania | Fastline This model I found, was definitely made for new seeding. I had in mind, using it when the dirt was pretty dry, but yet, not bone dry. Enough moisture, but not too wet, to scuff up. It basically collected grass on those spikes, and got a pretty decent buildup, instead of ripping through the sod, and opening up, with grass rolling around, like I had pictured how I thought it would work.
That one with the dual angled rollers would probably work a lot better, IF soil conditions were near perfect. I just kinda' question how well they would clean themselves in sod, when not running at a decent clip, to throw it off. I would venture to say, the drier the dirt, the better it would work in sod.
I don't know how large of a lawn you have in mind to repair, but, there are several push slit seeders on Columbus CL right now, for reasonable prices.
Toro 2 inch Slit Seeder - farm & garden - by owner - sale overseeder - billygoat - farm & garden - by owner - sale eXmark Ground Logic Bluebird Turfco lawn landscape - farm & garden - by owner - sale Classen Seededer - farm & garden - by owner - sale
It may not be the way you want to go, but if not all that large of an area, it may be easier to use something like this, than all of the work cleaning up the larger unit, as far as vacuuming out seed, etc.
Found a couple more pics of my seeder, saved in my files here. As you can see, the underneath is in pretty decent shape, as far as the slitting knives, drop tubes, and cover disc's. It originally belonged to Pickerington High School. They used it to reseed their football field, until they went with astro turf. The guy I bought it from ,bought it at the school surplus auction, to seed the lawn, for his new house he had built. He never used it in the few years he had it, and it needed to find a new home. The seed box did have a couple holes in it from leaving seed in it, so welded a patch of sheet metal on, to close those spots. The upper part of the box inside, still looks near new, with the seeding rate chart still near new under the lid. It just sat out in the weather for the time they had it. It's in the barn now, and unless there is a catastrophic disaster with it, should last me, the rest of my life.
