TM10-3930-660-20 5-12. HIGH PRESSURE FUEL LINES - REPLACE (Cont’d) If removal of lines (2) as a unit is desired, skip step 2 and go on to step 3. 2. 3. REMOVE SIX CAPSCREWS (4), SIX FLATWASHERS (5), THREE BRACKETS (6), AND SIX MOUNTS (7) SECURING FUEL LINES (2). REMOVE THREE CAPSCREWS (8) SECURING BRACKET (9) AND TWO BRACKETS (10) TO ENGINE . Hold delivery valve (11) stationary when loosening nuts (12) on fuel lines (2) at injection  pump  (13). 4. LOOSEN NUTS (12) ON FUEL LINES (2) AND REMOVE FUEL LINES (2) FROM INJECTION PUMP  (13). INSTALLATION CAUTION To ensure proper engine operation, do not weld or substitute lines (2). Fuel lines (2) are not interchangeable. Connect fuel lines to fuel injectors and fuel injection pump ports as noted during removal. Use tags for identification. 5-26