EE STATED THAT HE WAS CLIMBING ONTO A DOZER TO ADD HYDRUALIC OIL TO THE DOZER. HE HAD THE OIL HOSE IN HIS L. HAND W/ HIS R. HAND ON THE HAND-RAIL USING IT TO PULL HIMSELF UPON THE DOZER. DUR ING THIS PROCESS, HE FELT A MUSCLE PULL IN HIS LOWER RIGHT SIDE. INJURY NOT REPORTABLE UNTIL INCURRING LOST TIME ON 11-29-01.