TIB654X on 966 (WLDEP 178)
has a horrible screeching sound while the bus is moving. Bus did
not breakdown, but the screeching sounds seem serious.
Is it the fan belt? I encountered it once before on a DM3500.
After screeching for more than a minute or two, white smoke started
billowing out the sides of the bus and through the floorboards. The
BC stopped the bus, turned off the engine and declared engine
overheat.