EMPLOYEE ALLEDGED THAT WHILE IN THE PROCESS OF REMOVING A 40 LB. RADIATOR AT THE FM#3, HE FELT A SUDDEN PAIN IN HIS LEFT SHOULDER. THE EMPLOYEE CONTINUED WORKING HIS REGULAR SHIFTS. ON 4/19/04 EMPLOYEE REQUESTED MEDICAL ATTENTION FOR HIS SHOULDER PAIN. ON 4/22/2004 DOCTORS RECOMMENDED BED REST FOR 10 DAYS.