A HYDRAULIC LINE RUPTURED & SPRAYED OIL ON EXHAUST & INTO CAB OF D-9 DOZER. THE OIL IGNITED FROM THE EXHAUST & BURNED THE OPERATOR ON THE RT. ARM, APPROX. 2""X 4"" & ON THE FOREHEAD, APPROX. 1"" X 1"", ALONG WITH SEVERAL MORE MINOR BURNS. EE WOULD NOT GO TO THE DR. THE CAB DOOR WAS OPEN AT THE TIME OF ACCIDENT.