Do the grates come off the top of the burn plate on my older Hyfire I? I took the blowers off the back to vacuum out under the plates. It didn't look like they were removable? maybe just years of gunk sealed them down?
I can see where the whole stoker unit is removable with the 4 bolts and seals on the back.
Do you have a pic or sketch of them and how/if the grates are removable?