i have an accentra pellet stove and i love it. lately it seems the pellets get jammed up. i can leave the slide plate open and suck out the pellets with a vacuum(on a cold stove, lesson learned). after that it will work for a while but jams again. every rotation of the auger produces a clunking noise. i think there is a buildup in the auger tube or on the auger and want to remove the auger to check this. i took off the chain tension wheel but cannot get the auger sprocket off. i loosened the bolt that protrudes from the side of the sprocket. it is loose put will not come off. can anyone tell me how to get this sprocket off or point me to any site that has repair info? the standard brochure doesn't have any info about this. thanks.