But then my question would be...what good are they?
As I stated, most TPH implement skids are for the protection of the sheet metal. They're intended to ride just above the surface, and to take the brunt when
the tractor encounters bumps/dips/rises.
if there just for protection then there should be a set of drag shoes also. Something on that blower has to be in contact with the ground.
Yup, the rear housing. Well, almost anyway. The B74 mounts on the tractor three point hitch, and faces rearward. You back into the snow. The housing scoops up the snow, and the auger blows it out the discharge chute. As part of the setup, you adjust the tractor lower lift arms so that the runners/skids are say 1" above bare ground - then adjust the tractor toplink so that the housing collection edge is just a bit lower. Not necessarily touching the ground, that would grind
it down too (there's no replaceable scraping edge on the B74). But as close as possible to gather as much snow as possible. If you're more daring (or rich) lower it even further. Personal choice. Anyway. From that point, as the tractor negotiates uneven ground, the skids - being slightly lower than the housing edge - hit first, thereby preventing the aforementioned sheet metal damage
I admit this is not an all-inclusive explanation, there will be situations when something or everything may hit. Actual operation involves a lot of operator common sense. So if ya'all will accept this as a generic explanation, we can hopefully minimize the "
what ifs".
//greg//