T250-Idle pulley overheats and leaks oil

[Acreage T250]

I heard a loud pop, saw smoke near the front of the track. I shut down and noticed oil leaking from the idle pulley. The pulley was very hot. I set track tension to 1/2" clearance on the center roller on a brand new set of rubber tracks the night before.

I did about 2 hours of back blading on the driveway. I just got this machine operational after about 3 months of fixing other issues. Kind of pissed another issues surfaced this soon.

Is this normal? I assume this is sealed unit and not rebuildable