Hi I don't know alot about case combines.....but a friend of mine had a fire in his 1660,,,,,,seemed to start in right hand corner of of rotor cage,where a shaft goes thru.....nothing damaged except for paint burn
I had a fire-truck fire in my 2002 2388 on right side above feeder drive belt. I was in soybeans. What we found out the cotterkey was left out holding the top feeder chain drive-shaft,which worked over and rubbed against the big belt pulley, caused sparks, then starting the dust to burn. Once burning, fell on moving belt flinging back and up into hollow spot under hopper behind cab. lots of wires there. A hard place to get water into. Got it out with minor damage. I was lucky! Dakota