There was a problem with the nose wheel and tug. tug removed ,gear inspected, castored at 90 degrees no damage , waited for another tug to complete pushback. It caused further chaos in addition to another tug broken on 207. Gnd controller at one point told the pilot of this 747 to "shut up", adding great mirth to the sojourn during our taxi in.
hope that helps
the callsign was snowcock or iceballs or something like that