How often do you replace the impeller? I'm just a home owner and i still seem to go through at least 1 impeller per year because of wear on the offset circle that interfaces with the agitator to make it wobble. I've checked all the potential sources of friction to see if that might be causing it, but everything moves nicely. I do have the permagreen agitator so thinking that might cause extra friction/force when the hopper is full. Do you grease/lube this part of the impeller (I hesitate due to fertilizer sticking to it)
the part that is on the impeller that makes the agitator move is it parallel to the ground flat not angled down? Your impeller should last longer I think the agitator assembly may be lifting up went under load from your agitator and it won’t do this if it’s flat or parallel to the ground.
I only use those keys to get all my spreaders the same after one is calibrated. Then from there if one guy walks faster you can calibrate that spreader to that technician.
