72,
Boogie, a member here at Minn. Outdoors has parts for your machine. Send him a PM you need. If you look around the snow cat forum a bit you may find his posts, then click on his handle. From the page you bring up click on contact info and you will then be able to leave him a message. Or do a search for his handle...
Narrow tracks tells me you have sumer tracks, steel cleats like 31" wide? Tall grass that is not mowed should be no problem, but stay away from short or mowed grass. "rounded cleats" I am not familiar with, so cann't really say. At any rate it will be tough on the grass, tough enough not sure why anyone would do this to an area that they mow. Plus it may detrack on such surface.....don't want that. Now is the time to get it ready for snow!
Regards, Kirk