Like the others in the 8000 and 9000 series tractors, it will be a ceramic button clutch. But there are no access holes. Check the clutch linkage on the left side of the bell housing. It may be that the fire created enough heat in this area to melt the bushing on the clutch throwout shaft. A little slop in that bushing means a big amount of wasted motion on the throwout fork. There should be an adjustable clevis for adjusting the clutch free play. I think I'd adjust all the free play out so the throwout bearing is in constant contact with the clutch fingers and take the tractor out to do some heavy tillage. Keep your clutch pedal pushed down until it breaks free. Shut it down and readjust the free play until it seems normal. I have also found that clevis and clevis pin to be worn and need replacement.
Paul in MN