EE WAS REMOVING A BRAKE UNIT FROM AN EIMCO SCOOP. HE HAD UNBOLTED THE UNIT AND HAD PRYED IT LOOSE TO RELEASE THE TENSION. THIS ALLOWED THE BRAKE TO TURN A COUPLE OF REVOLUTIONS. SEEING THAT TH E UNIT WAS LOOSE, HE ATTEMPTED TO REMOVE IT WHEN IT TURNED ANOTHER 1/4 REVOLUTION. WHEN THAT OCCURRED, HIS LEFT THUMB WAS PINCHED BETWEEN THE BRAKE UNTI AND A MOTOR PULLEY. THIS RESULTED IN A