EE WAS INSTALLING TRACK ON A D10 DOZER. WHILE WAITING FOR AIR COMPRESSOR TO BUILDUP TO PUT FINAL TORQUE ON TRACK BOLTS, EE WAS WATCHING BOOM TRUCK OPERATOR AND RESTED HIS RIGHT HAND ON TRACK. THE TRACK MOVED AND TRAPPED HIS RIGHT HAND BETWEEN TWO TRACK PADS CAUSING A LACERATION AND BROKEN BONE.