440 871 supercharger ?

not sure what happend, i was able to get it to turn by moving it back and fourth, there was one small spot on two of the rotors about an 1'' from the end that was hitting the case, was able to smooth them down so it would turn free, looks like the front end of the blower may have been tightned down to where the rotors touched the housing and built up material until it ceased..it turns free now both ways but not sure if i should run it ....calling dyer in the morning and ask them