EE AND CO WORKER WERE REPLACING THE ROLLER ON A DOZER. THE WELD THEY HAD MADE TO HOLD THE BOGGEY IN PLACE BROKE. THIS ALLOWED THE BOGGEY TO SLIP AND CATCH HIS FINGER. NBO BROKEN BONES BUT HE H AD A DEEP LACERATION ON HIS LEFT INDEX FINGER. SEVERAL STITCHES WERE REQUIRED TO CLOSE THE WOUND. HE RETURNED TO WORK THE NEXT SCHEDULED SHIFT WHICH WAS 8/26/01.