TM  10-4320-344-24 2.21.7 Fuel Injection Lines and Fuel Leakoff Manifold Assembly Maintenance. This   task   covers: 2.21.7.1 Removal 2.21.7.3    Installation 2 . 21 . 7 . 2    R e p a ir INITIAL SETUP Tools General   Mechanic’s   Automotive Tool   Kit,   Appendix   B,   Section III,   Item   1 Goggles,   Appendix   B,   Section   III, Item  2 Gun,    Air   Blow,   Appendix   B,   Section III,   Item   2 Material/Parts Pan,   Appendix   C,   Item   19 Rags,   Appendix   C,   Item   20 Tags,   Appendix   C,   Item   31 Tape,   Antiseize,   Appendix   C,   Item   32 Lock   Washers   (TM   10-4320-344-24P) Equipment    Conditions Pumping   station   shut   down,   TM   10-4320- 344-10. Air   Cowling   removed,   TM   10-4320-344-10 (609-C  and  US636HCCD-1). Equipment  Conditions  (Continued) Fuel   Return   Line   disconnected   and   capped, paragraph   2.21.2   (609-C   and   US636HCCD-1). Hood   Assembly   removed,   paragraph   2.19.1 (609-A). Shield   Assembly   removed,   paragraph   2.19.3 (609-A). General   Safety   Instructions Do  not  work  on  equipment  that  is  not securely   stabilized   to   prevent   rolling o r    s l i d i n g. Diesel   fuel   is   flammable. Keep   sparks, cigarettes,   and   open   flame   away   from   fuel system   components. Do   not   work   on   equipment   without   follow- ing   standard   shop   safety   practices. • This  general  maintenance  procedure  applies  to  all  three  models  of  the 600   GPM   pumping   assembly. • Remove   pipe   tee   from   fuel   injector   and   nozzle   holder   assembly   when removing   both   the   fuel   injection   line   and   fuel   leakoff   manifold   line from   a   fuel   injector   and   nozzle   holder   assembly   on   Model   609-A. 2.21.7.1  Removal. Refer   to   figure   2-120   and fuel   leakoff   manifold   line   and   fittings   as 2.21.7.2  Repair. a . Inspect   all   fuel   injection   lines   and tag   and   disconnect   fuel   injection   line   or required. fuel   leakoff   manifold   lines   for   kinks, holes,    cracks,   blockages,   or   damaged   nuts. b. Inspect   fittings   for   cracks,    damaged   threads,   blockages,   or   distortions. To   prevent   foreign   objects   from   embedding   in   eyes,    wear   eye   protection   goggles when   using   compressed   air. Failure  to  obey  this  warning  may  result  in  personal i n j u r y . c . Using   compressed   dry   air   remove   any   blockages   in   fuel   injection   lines   and   fuel leakoff   manifold   lines   and   fittings. 2-277