TM10-3930-660-34 5-3.  RADIATOR - REPAIR (Cont’d) INSPECTION 1.   INSPECT CORE AND UPPER AND LOWER TANKS FOR SMALL HOLES, OR FOR OTHER EVIDENCE OF MINOR LEAKS.  REPAIR MINOR LEAKS BY SOLDERING OR BRAZING. 2.   CHECK FILLER CAP OPENING PRESSURE IN A SUITABLE TESTER.  OPENING PRESSURE MUST BE A MINIMUM OF 7 PSI. 3.   CHECK DRAIN PETCOCK (4) FOR DAMAGED THREADS OR SIGNS OF LEAKAGE. ASSEMBLY 1.   INSTALL DRAIN PETCOCK (4). 2.   ASSEMBLE SHROUD (2) TO RADIATOR (3) AND SECURE WITH EIGHT SCREWS (1). 5-4